If you are looking for an opportunity to build a warm home for little money, consider building a house from SIP panels. The cost of a two-story house 10 * 10 meters without finishing is about 17-20 thousand dollars. In this case, there is no need for additional insulation; the house can be occupied immediately after construction (if communications are connected) and finishing can begin immediately.
What is a SIP panel
The construction of houses from SIP panels began in the second half of the twentieth century in Canada. The technology is simple, it takes very little time to build a house (from two to three weeks, depending on the complexity of the project), only a frame house can be cheaper.
Houses are built from thermal insulation panels, which themselves are sufficiently strong. In English these panels are called SIP, which is an abbreviation of the following name: Structural Insulated Panel. This translates to "structural insulated panel". It turns out that the idea is that in Russian the name of this material should sound like CTU. In fact, normal transliteration is used (replacing English letters with Cyrillic). As a result, the name "SIP panel" is used.
SIP panel and installation method with beams
This material consists of two OSB boards, between which a layer of insulation (foam) is laid. The result is a kind of sandwich (a construction “multi-layer sandwich”). Hence another name - sandwich panels.
When building a house, there are two types of assembly:
- With a frame (frame-panel technology). In private housing construction, wooden beams are used; in the construction of high-rise buildings (there are such), the frame is made of steel. In frame technology, panels are connected using wooden beams
- Frameless technology involves connecting panels using thermal keys - strip inserts made of SIP panels of smaller thickness.
In our country, the first option is most popular. The wooden frame gives the structure additional strength. The load-bearing capacity of sandwich panels without a frame is more than enough for the construction of one or two-story private houses. But knowing that the house is built on solid timber is reassuring. This technology has another advantage - maintainability. If problems arise, you can remove the damaged panel and replace it with a new one, which is impossible with frameless technology.
Construction from SIP panels
When comparing different construction technologies it is now impossible not to take into account thermal protection . And it is around the walls that the most controversy usually flares up; houses made of sandwich panels are no exception.
When using traditional technologies, only multilayer structures are created, which are not without their drawbacks. For example, timber or brick necessarily require addition in the form of at least one layer of insulation. These products differ quite significantly from ordinary walls made of the same materials.
Additional insulation means increased prices and is fraught with many other problems. In some cases, state representatives prohibit choosing this option, since it is absolutely not suitable for the current weather conditions.
Durability, environmental friendliness and flammability are properties in which brick outperforms other materials. But these characteristics disappear as soon as insulation is used. Such a decision would be risky, complex and expensive. But everyone can easily create sandwich panels with their own hands, and their quality will be in no way inferior to the factory one, and many difficulties can be avoided during individual construction. It is not necessary to invest large sums of money.
Problems most often arise at the layer boundaries in multilayer structures. It is necessary to follow several rules when arranging warm walls.
First of all, there should be no unventilated air gaps between the finishing or load-bearing layers , as well as the insulation itself. Otherwise, moisture will accumulate inside the structure and the thermal protection will be impaired. Which, in turn, leads to the formation of mold, rapid destruction, and so on.
The insulation must be glued over the entire surface if a ventilated gap is not provided. But there are objective and subjective reasons why it becomes almost impossible to follow this rule. Therefore, Russian new buildings often suffer from low quality. The technology for installing sandwich panels is a completely different matter.
There are no air gaps in the SIP panel, which is glued together under a special press in the factory. In this case, additional vapor and wind barrier is not required. The problems that arise inside multilayer structures are absent in this case. This is the main advantage for the builders themselves. In this sense, SIP panels are similar to products made of stone, concrete, brick and other materials, made in one layer. True, these same products cannot be compared with SIP panels in terms of thermal conductivity.
Construction from SIP panels has excellent potential when it comes to energy-efficient technologies. These houses are really very warm. You can compare their ability to retain heat with a thermos.
Advantages and disadvantages
Like any new technology for our country, building a house from SIP panels has its adherents and opponents. Opponents have the most important argument - the unnaturalness of the materials and the possibility of releasing harmful substances. Indeed, these boards consist of foam and OSB. Polystyrene foam is a common material and is only dangerous when it burns. OSB has also been on the market for a long time; it is made from pressed large shavings and wood chips. Resins containing formaldehyde are added as a binder. It is this binder that raises the most questions: formaldehyde is a strong poison and its presence in the atmosphere in large quantities causes poisoning.
Formaldehyde emissions should be controlled by the SES (sanitary and epidemiological station), and only safe building materials should be on sale. So if you are planning to build a house from SIP panels, carefully choose the manufacturer - the quality of the material depends on his integrity. Panels assembled by the German company OSB Egger (EGGER) are recognized as the highest quality and safest. Their formaldehyde emissions are E1 (safe).
Excerpt from GOST R 56309-2014 (date of introduction 2015-07-01): “Depending on the content (emission) of formaldehyde, slabs are manufactured in emission classes E0.5, E1 and E2.”
| Formaldehyde emission class of slabs | Application of slabs |
| E0.5; E1 | As structural elements of residential and public buildings, including for public premises, as well as products and structures used inside residential premises |
| E2 | For industrial products used outside residential premises |
At the same time, they easily tolerate high humidity, do not absorb water and are not deformed.
SIP panel Egger E1 2800x625x174 (Romania) - the best option for walls
German Glunz Agepan panels are also good, but few people use them. If we talk about Russian manufacturers, then you should pay attention to the products. Only safe and high-quality materials are used in production:
- OSB-3 Kalevala Russia emission class E1;
- Glue - TOP-UR (Russia);
- Expanded polystyrene - PSBS - 25C Knauf (Russia).
Speaking about the advantages of construction from SIP panels, it is necessary to pay attention to the fact that the technology has been developed for a long time. Elements for various elements of the house are produced from SIP panels: external walls, partitions, interfloor ceilings, etc.
Each part of the building has its own panels
Why do people build houses from SIP panels? Because such a house has solid advantages:
- Light weight, which allows you to save on the foundation. Pile or pile-grillage foundations are ideal for this type of building.
- Low heat loss, low heating costs. Expanded polystyrene is an excellent insulation material, and it is sandwiched on both sides with OSB sheets. This is what makes a sandwich panel house very warm.
- Low cost per square meter.
- Short construction time. The box of a two-story house can be assembled in a month.
- No shrinkage. There may be settlement at the foundation. The structure made from SIP panels has no settlement.
- Finishing work can begin immediately after the box is assembled.
It is this set of properties that attracts people to choose a house made of SIP panels. They build both permanent houses and dachas. So, with a limited budget, building a house from SIP panels can be a very good solution.
Installation of sandwich panels
Two-story cottages built from SIP panels have a huge margin of safety. Adding a third or other floors usually does not affect this indicator. The exterior decoration of a house made from SIP panels can be absolutely anything. Moreover, this additional strength is achieved without additional costs. We can say that this is a design feature of this particular technology.
Sometimes technology from this group is called frameless to emphasize the role of panels as load-bearing elements. There is no mistake in this either. For such structures it is not necessary to have an external or internal frame. To connect the main elements in many situations, special thermal inserts or dowels made of OSB-3 .
Installation of sandwich panels, video:
In most cases, the supporting structure of the house is assembled from panels. This applies to the roof, ceiling and walls. But the production of sip panels allows them to be used both as insulation for enclosing structures and for arranging internal partitions. The power frame is also often sheathed with this material.
If we are talking about individual construction , then when constructing floors and roofs, a special support frame is often used. Purlins are the supporting beams on which panels in different parts of the house rest.
We can say that in such houses both classic options and modern solutions are often used together.
It is customary to classify frame houses in our country according to the material of the walls. For example, classic rafter roofs are present in almost all brick houses. This means that they will be wood frame. To make it easier, we should call “Canadian” houses where the walls consist entirely of SIP panels. After all, it is when they are used in walls that most of the advantages of the material are revealed.
You will be interested in this article - Construction of frame houses, reviews from residents.
In addition, it is worth noting the properties of thermal insulation , which allow it to be used even in the construction of an attic or zero ceiling in the roof. Interior decoration of a house from SIP panels will never cause problems.
SIP technology is not an alternative to traditional frames, but an extension of them. If you use this technology wisely, the characteristics of your home will improve significantly.
Construction of houses from sip panels, video:
We list the main advantages:
- Absolutely safe for the environment. By deciding to build a house from sip panels with your own hands, its owners will protect their health.
- Extremely robust construction.
- Easy to maintain, reliable.
- No need for air conditioning or powerful heating systems.
- The house itself cools down slowly, but warms up quickly.
- It will be as comfortable as possible inside both in the heat and in the cold.
- The surrounding landscape changes minimally.
- Construction can be carried out at any time of the year.
- Defects are reduced to a minimum; only factory equipment is used for the production of sip panels.
- There is no need to use special equipment, everything is assembled very quickly and simply.
- It is quite possible to install a screw foundation; this will take a maximum of one day.
- The weight of the house is very small.
- Immediately after assembly, finishing work can begin; the material does not shrink.
- The box is prepared at home in just one to two weeks. Construction time is minimal.
- The total costs of such construction are also minimal.
- You can save several times more on heating than using other materials and solutions.
- Thermal protection is truly unique. And the house itself is one and a half times cheaper than other varieties.
Regarding our country, we can say that the material of the walls has always determined the overall quality of the house. Wood and stone have always been considered traditional options for creating high-quality structures
Prefabricated buildings made of sandwich panels, video:
How to build it yourself
There are two ways to build a house from SIP panels with your own hands:
- Buy a house kit for a specific project from a company that deals with this, and assemble it yourself. Not all companies agree to this, but many have a supervising installation service. This is when a company specialist supervises your installation.
- Buy slabs. Cut them to the required sizes, purchase timber, do it all yourself. In this case, all responsibility for the quality of construction will fall on you. If you have carpentry skills or have someone to help you with, you can choose this option.
Briefly about what a house kit is. This is a set of ready-made SIP panels, wooden beams of the required size and fasteners for building a specific house. All components are factory cut and numbered. During construction, you use the resulting blocks in a certain order. The process is similar to building a house from a children's construction set, only you are building a real house.
Building a house from SIP panels when ordering a house kit is like playing LEGO
A house kit is good if everything is done accurately. This is not only about the quality of SIP panels (it must be checked separately), but also about the use of dry wood (chamber drying), and about the accuracy of the cut. The edges of the panels must precisely “grab” the beam, the two panels must be joined with an expansion gap of about 3 mm - all this is achieved using precise equipment.
The expansion gap is the required distance that is left between building materials that are subject to expansion (dilatation). If a house is being built in a region with a humid climate (for example, the Leningrad region), then it is imperative to leave an expansion gap, otherwise the OSB will swell. In dry climates, there is no need for a gap between OSB.
Finishing a house from sip panels
The finishing of sip panels (internal and external) can be chosen to your taste - any will do. There are no restrictions here, except financial ones, since sip panels perform equally well when finished with wooden materials, when using tiles or stone, and in all other options.
Construction stages: photo report
Construction of a house from SIP panels, like any other, begins with the selection and construction of a foundation. A pile foundation is considered optimal for a lightweight house. This is exactly what is done in most cases when starting the construction of a house using SIP technology. Sometimes it is impossible to install a pile foundation:
- on hard soils that are too expensive to drill (rocks);
- on unstable soils with low bearing capacity (peat bogs);
- in the presence of cavities in the rock mass.
In these cases, they make a strip or slab (more often USHP is an insulated Swedish stove). They are much more expensive, but more reliable.
A strip foundation or in the form of a slab is also suitable
Once the foundation has been selected and calculated, its construction can begin.
Making a pile foundation
Since foundations are most often made from screw piles, we will illustrate exactly how they are made. Piles are screwed into the ground manually (if the soil and strength allow) or using special equipment. The height of the heads is 80 cm above ground level, the distance between the piles is no more than 2.5 meters.
Screwed piles and caps welded to them
The heads are welded to the installed piles, and the strapping beam is attached to them (in this example, 200*200 mm).
The joints of the timber must be located on the heads. When laying the strapping beams, do not forget to coat the locks with a protective compound (bitumen mastic) before joining.
There is no support under the joint - this cannot be done
To protect against rotting and insects, the strapping beams are impregnated with a protective compound. Roofing material was laid in two layers under the timber (on the heads).
We attach the timber to the heads and coat it with a protective compound
This stage takes from 3-4 days to a week. It depends on the complexity of the soil, whether you work with the equipment or turn it yourself. Now you can start laying the floor slabs, but before that you should familiarize yourself with the methods of connecting them.
How to connect SIP panels: basic principle
When connecting panels, a wooden dowel (timber) or thermal key (SIP panel of smaller thickness) is inserted between them. As mentioned above, in our country the technology using a frame is more popular, i.e. the key is a dry timber. It is this option that we will focus on.
The beam is inserted into the groove and fixed using self-tapping screws or nails, which are twisted and driven through the OSB into the body of the beam. If you have a nail gun, we first recommend gripping the panels with wood screws 40-50 mm long, and then punching the joints with white nails 50-65 mm long in increments of 10-15 cm.
The following can be used to fasten SIP panels: “yellow” wood screws, galvanized screw nails, galvanized rough nails. Do not use “black” hardened screws - they break off and quickly corrode
There is always a risk that the connection will be leaky, and the entire construction technology of SIP panels is based on the thermos effect, that is, on maximum tightness. Therefore, before assembling this unit (and any other), foam is applied to the side surface of the panel. It fills all the voids, providing the proper level of heat and moisture insulation.
The main unit when connecting SIP panels: joining two panels end-to-end
The picture above shows a dowel made from double timber. Often such recommendations are perceived incorrectly, and in order to save money, unplaned edged boards 50x150x6000 mm of natural humidity are purchased. Once the board dries, the joint is unlikely to remain sealed.
If you are not limited on funds, we recommend using solid timber from dry planed wood, chamber dried
When making a composite wooden dowel 100*150, in our opinion, it is preferable to use three dry bars with a cross-section of 50*100 mm - in this case the connections overlap (see video below).
If we are talking about wall panels, then it makes sense to insert and secure the dowels in advance.
The foam was applied, the beam was inserted, and secured with self-tapping screws. Foam was applied to the side edge of the second slab, the groove was placed under the protruding part of the beam, an expansion gap of 3 mm was set, and secured with self-tapping screws. The foam that came out of the seams during the installation process is cut off after polymerization.
This is what it looks like
This technique, with minor modifications, is repeated in any connection of SIP panels. The diagram of this node is presented above.
After cutting the slabs, it becomes necessary to remove polystyrene foam to the required depth. For these purposes, an electric thermal knife (cutter) for foam rubber is used. They come in different designs, but the thermal knife must be equipped with a limiter. Only in this case will you be able to remove polystyrene foam exactly to the required depth. An incorrect cut can cause cold bridges to appear at the joints of the panels.
Electric foam cutter with installed cutting depth limiter
You can make the cutter yourself, but you should not forget about safety precautions when working with electric current.
First overlap
The first floor is nothing more than a floor that does not require insulation. As melted, it is assembled from SIP panels with a thickness of 224 mm and a width of 625 mm. With such a width of the slabs, the wooden beams are spaced at intervals of about 60 cm, which is enough to withstand the load.
If you have slabs with a width of 1250 mm, then they need to be sawn lengthwise into two equal parts.
When installing the ceiling, the panels should be laid like bricks in masonry - with the seams mismatching (staggered). This is necessary to ensure that the seams do not warp when humidity increases.
These are the pieces that floor blocks should be cut into when using 1250 mm wide slabs
To protect the bottom OSB board from moisture, each of the boards is coated on one side with the same bitumen mastic. You can use other compositions with similar properties.
Assembly of SIP floor panels for the first floor
When connecting the slabs, a mounting beam is laid between them (diagram in the previous paragraph). The beam is attached at the edges to the frame (with long nails), and the edges of the slabs are attached to it using self-tapping screws.
We cover the side sections of the slabs (all floors) with an edged board of a suitable size. We apply foam to the side surface of the slab using a snake, then we place a board and fasten it through the OSB with self-tapping screws into the end of the board.
Closing the floor sections
A starting (crown) board is laid on top of the sandwich along the perimeter, on which the SIP wall panels will rest. It is laid around the perimeter and in those places where partitions will be installed.
Method of fastening the first floor and thrust beam
The crown boards are fastened with nails or self-tapping screws, but to be sure, they were secured through and through with pins to the pile heads. Holes were drilled for the studs. A pin is driven into them and tightened with nuts.
Walling
We continue the construction of a house from SIP panels: we are installing the walls of the first floor. For this work, it is advisable to have two assistants, then the process will go faster and easier.
We place the first panel so that it “fits” onto the crown board
Wall installation begins from one of the corners. When installing the panel, the notch at the bottom rests on the installed starter board (first apply a layer of foam to the board or end of the sandwich). The panel is placed, aligned vertically, attached to the starting board on both sides with self-tapping screws in increments of 10-15 cm.
Assembly of the wall slab to the strapping beam
Foam is applied to the side surface of the installed slab, and another slab is set at an angle of 90°. An embedded board (end block) is pre-attached to its side part, the thickness of which is equal to the depth of the groove. Like the first one, this panel is attached to the strapping starting board.
We fasten the corner from sandwich panels
In addition, we fasten the corner using long self-tapping screws.
As a rule, self-tapping screws with a length of 220 to 280 mm are used
The length of the self-tapping screw must be such that it passes through the slab and the entire thickness of the embedded board. The installation step of this fastener is 40-50 cm.
The principle of assembling the first floor wall
Next, the walls from SIP panels are assembled according to the same principle: we place a beam between the slabs (if it was not inserted previously), and attach the next slab to it and to the bottom frame. Simple and fast.
In window and door openings, for more reliable fastening, you can install metal perforated reinforced corners. The element is optional, but adds rigidity and inspires confidence.
External walls and partitions are immediately erected
The installation of partitions from SIP panels follows the same principle: we attach a crown board and partition blocks to it. They can be the same thickness as the outer walls, but thinner ones can be used. The decrease in sound insulation properties is compensated by the interior decoration.
To save money, partitions can be made using frame technology. Then you can initially install only the frame, and its cladding can be transferred to a later period. It is more convenient to do this when the roof is already installed.
In a house, frame partitions can be made from SIP panels
Interfloor ceiling
To install floor slabs in the grooves of wall panels, boards are installed on foam and self-tapping screws. They create a harness for installing the ceiling.
Preparing the piping for the interfloor ceiling
Next we lay the floor slabs. If the partitions are assembled from SIP panels, their load-bearing capacity is quite high and no additional reinforcement measures are required. If the partitions were assembled using frame technology, we make the upper beams reinforced: they are assembled from three boards glued together. For greater strength, the beams can also be fastened on both sides with self-tapping screws.
Reinforced beams
Floor slabs made of SIP panels are laid on the finished frame. They should be no more than 625 mm wide and should be laid staggered (with the seams mismatched). Since the panels are narrow, there is a lot of wooden beams in the ceiling. Due to this, such a floor can withstand loads in places where there are no floor beams.
This is what it looks like from above
We fasten the laid slabs to the framing beam with self-tapping screws or nails. The edges of the OSB are at the top and bottom to each intermediate beam. After securing the installation of the ceiling, we close the open side sections along the perimeter of the building according to the same principle: foam + edged board. For greater rigidity, in those places where the floor beams pass, we fasten the floor panels with long self-tapping screws (220 mm) all the way through.
A couple more angles
This stage after assembling the first floor does not seem difficult. Everything is the same, only the work is at height, tightening the sandwich panels takes longer and is more difficult than installing them.
Second floor walls
The second floor in this project is an attic, so the wall panels are low. We also install partitions at the same time as the external walls. Before installing the roof, an embedded beam is installed in the upper open groove; roofing SIP panels will be attached to it.
The outside is much taller
Standard panels will have to be cut to fit the gables, since the shape is non-standard. The installation and connection of the wall panels themselves on the second floor is no different.
Roof made of SIP panels
Special sandwich panels are used for the roof. Under them, the ends of the slabs are cut at a certain angle, which is determined by the angle of inclination of the roof slope. Here, just as with flooring, you can get by with a minimum of beams, because each connection has its own beam. Therefore, the rafter system is not assembled.
For a roof made of SIP panels, beams need a minimum
Skate decoration
The roof of a small to medium sized house is made of SIP panels and usually has a central ridge beam. Here two planes of the roof converge. This node can be designed in two ways (in the pictures below). The first one is symmetrical. The sandwich panels are cut at an angle, and the top of the ridge beam is cut at the same angle. Two planes are fastened with long self-tapping screws through the panel to the beam on both sides. The fastener installation step is 30-40 cm.
Method of connecting two roof planes on a ridge beam with slabs sawn at an angle
In this method, there is no regular strip between the two plates, they are connected only with foam. After polymerization of the foam, the excess is cut off, the seam is treated with a waterproof sealant, after which a protective strip, made of metal or plastic, is put on the ridge. There is another way to connect SIP roofing panels on the ridge. The second method does not require cutting the panels at an angle, but one part of the panels must be longer (by the thickness of the roofing slab). The beam is still cut at an angle, the plates are joined at right angles and secured to the beam with long screws.
Docking without undercuts
This connection uses embedded end bars. They are installed as usual - using mounting foam and self-tapping screws. To block the access of moisture to the under-roof space, the junction of the two panels is also additionally coated with a waterproof sealant.
There is an option to install a roof from SIP panels without a central beam. There are roofing options with two load-bearing beams that are located off-center. These can be either specially laid floor beams, or partitions assembled from SIP panels or using frame technology. In the second case, it is better to strengthen the beams (make them prefabricated with glue and nails).
If there are two rows of partitions or two load-bearing beams
The most difficult thing in this unit is to cut the embedded beams at the right angle. This can be done on the ground, which greatly simplifies the task. The panels are fastened through the slab with long self-tapping screws to the floor beams or mortgages in the partitions. Also, two planes are fastened together at the junction point - on opposite sides with long self-tapping screws.
Roof and wall panel connections
For laying SIP roofing slabs, wall slabs are cut at the required angle. The inner part of the OSB is higher than the outer part. The foam plastic is “cut” at the same angle, and the edges of the embedded beam are trimmed. It is this part that is the most difficult if you did not buy a house kit, but are building a house from SIP panels using standard panels, cutting them to the required dimensions with your own hands.
How to connect wall and roof SIP panels
If you have the right equipment, they can be cut at an angle. The problem is cutting the foam between the OSB boards to the correct depth. You can extract the core using a thermal knife, and then remove the remains purely mechanically. Chances are the cut won't be smooth anyway, so you'll have to add more foam to fill in any uneven spots.
If the roof overhang is made without insulation
In the pictures, the roof overhang is also made of slabs with insulation. This is easier to implement, but it is an unreasonable expense. To save money, the length of the SIP panel is taken up to the intersection with the walls, and then only the timber goes (as in the photo). In this case, the beam is made composite: one part is longer by the amount of the overhang, the second is shorter and ends where the wall ends.
Features of joining roofing slabs
The connection of two roofing slabs occurs in the same way as others: timber, foam, self-tapping screws. But since precipitation is possible here, it is advisable to seal all seams.
Assembling a roof from sandwich panels
To improve the tightness, all seams on the roof are additionally coated with waterproof sealant. First, the hardened foam is cut into a plane with the roof, then a sealant is applied. After filing the overhangs, we can consider that the construction of a house made of SIP panels is completed. Install windows/doors, connect communications and the home is already suitable for habitation. Finishing can be done immediately after installing the box.
Mice and other troubles
To save our readers from unnecessary headaches, we decided to talk about the mistakes made during the construction of one residential building. First of all, the material is intended for those who hire contractors for construction. However, it will also be useful for those who build a house on their own.
The facility was built under the “Rural House” program, and the local team acted as the contractor - “uh”. Unfortunately, the future residents did not pay due attention to the quality of the work. The result is natural - a large number of significant “jambs”.
Brief information about the house:
- Commissioning date: 2021
- Number of floors: 2
- Foundation type: strip
- Technology: frameless
- Panel sizes: 2740x1220x224 (floors), 2740x1220x174 (walls), 2740x1220x145 (dowel for connecting wall panels)
Problems appeared quite quickly and were associated with the most important part of any structure - the foundation. The strip foundation was filled with low-quality concrete, which led to the fact that when moisture entered, it began to crumble.
Under the influence of moisture, the foundation began to crumble
In extreme cold (below -30 °C), another “jamb” was discovered - part of the plastic floor plinth in the kitchen froze.
It was decided to remove the bottom panels of the vinyl siding, remove the cold bridges where the wall slabs adjoin the first floor ceiling, and sheathe the foundation with corrugated sheets to look like stone.
After dismantling the lower siding panels, signs of field mice appeared.
Installed pieces of plywood with large distances between them
Introduction to roofing felt. At the time the house was built, vapor-permeable membranes had not been heard of in a particular locality. The contractor was going to lay plastic sheeting on the walls. The customer opposed this, and as a result, roofing felt was used.
It is clearly visible that the mice did not waste any time...
When the baseboard froze, mouse holes were found and the seam between the OSB was not foamed
As a result, the owner of the house had to mitigate the consequences using his modest construction experience.
The possibility of mice accessing the polystyrene foam was previously blocked, then the foundation was sheathed with corrugated sheets
Related errors:
- The lower part of the first floor ceiling has not been treated with bitumen mastic.
- SIP panels with a width of 1220 mm were laid on the floors of the first and second floors (they had to be cut in half lengthwise).
- Raw wood was used.
- The panel for making thermal keys is thinner than the polystyrene foam layer.
- The corners of the house are not tightened with long screws.
- Self-tapping screws are exclusively black.
There were other mistakes, but we do not talk about them, as they do not directly relate to the technology of constructing SIP houses.
Alas, the case discussed above is not the most severe - the fatal option is discussed in the video below.
The conclusion is very simple: you should not blindly trust the customer. All stages of construction must be supervised personally, or seek the help of a knowledgeable person from the outside.
If the construction is carried out by contractors, then the quality of their work can be assessed already at the stage of acceptance of the first floor slab.
