How to insulate the foundation on screw piles yourself
In any home, the main condition for a comfortable microclimate is a warm floor. The main negative feature of the foundation is the presence of space under the floor, which leads to the flow of cold from below. Given the rise of warm air upwards, it is necessary to insulate the foundation of the house, high-quality basement insulationto protect the house from the influx of cold air through insufficiently insulated floors and basement.
Insulation of the foundation from piles with mineral wool
Since the insulation (for example, mineral wool) will be in contact with the ground, you should choose a foundation insulation using screw piles, which is not afraid of moisture and in which rodents will not start. There is also a need to create a structure (frame) that replaces the missing basement of the house and its subsequent insulation with mineral wool or foam plastic. Therefore, work is carried out from the outside and from the inside.
If you choose mineral wool, then it should be carefully protected from moisture with a layer of waterproofing. When using inexpensive foam, the insulation should be additionally protected from rodents. When insulating the foundation from screw piles (pile screw foundation) with foam plastic, these additional works are not needed, since foam plastic is not afraid of moisture, rodents will not settle in it, and it is also much stronger than foam plastic.
What insulation to choose for a pile screw foundation
The method of fastening foam from the outside and the subsequent installation of DSP boards.
Now you need to choose a material for insulating the base of the pile screw foundation. A lot of moisture comes from the ground, which means that you need to choose a heater that is not afraid of water and does not lose its thermal insulation characteristics, even when wet. At the same time, it must be taken into account that the thermal insulation will be in contact with the ground and perform its tasks in quite extreme conditions. It is also easier to insulate the foundation on screw piles with high-density sheet material or liquid thermal insulation.
Therefore, you need to choose among the following materials:
- Styrofoam;
- extruded polystyrene foam;
The thermal conductivity of foam plastic and extruded polystyrene foam is 0.032 W / m * C. Penoizol has approximately the same characteristics, only unlike polystyrene, it allows steam to pass through. Moisture does not pass none of the above materials. From mineral wool, even from
, it is better to refuse. The latter, although resistant to moisture, is still not as much as polymers. In addition, installation will be quite difficult.
Pile foundation insulation technology
The whole process of warming a screw pile foundation for a wooden house can be divided into the following works:
- implementation of waterproofing;
- construction of a frame mesh for the basement;
- installation of insulation on the frame;
- external finishing on a heater;
- internal insulation of the foundation.
Performing waterproofing
Regardless of what material the piles are made of, they require the right protection. If the installation of waterproofing under the insulation layer depends on the material chosen, then the main foundation structures must be protected from the aggressive action of moisture.
Metal piles are coated with a primer, wooden piles are impregnated with special antiseptics.
It is important to carefully treat all exposed surfaces to prevent their early destruction.
The construction of the frame mesh for the plinth
The frame mesh is made of wood or metal. These structures also need to be protected from moisture.
The principle of operation is simple. A crate is created for the selected insulation so that the cells are smaller than the insulation boards. This will make it possible to attach the insulation to the frame.
An impromptu basement is being built all over the outer part of the house, which will keep the heat inside. For strength, the metal frame is welded and slightly deepened into the ground.
It is necessary to achieve the strength of the structure so that it can withstand significant wind loads and not collapse in bad weather. To further strengthen the frame, sometimes concrete is poured over the base of the frame along the perimeter of the building.
The second version of the basement is built of brick. The process is more time-consuming, but the result is a really solid structure, which you don’t have to worry about during operation.
We warm the pile foundation with brickwork
Under such a base, you definitely need to build your own. Then laying is carried out in half a brick, followed by insulation.
Installation of insulation on the frame
If the frame is built correctly, the installation of insulation will not cause problems. Insulation plates are stacked and tightly pressed against the frame. You can make additional fastening with retaining bolts.
All formed joints should be carefully sealed. Mounting foam works well for this.
If a material is used that is afraid of moisture, it is necessary to perform a waterproofing layer. This will protect the insulation from attack by rodents.
In this regard, it is not recommended to use foam, which is a favorite material for mice and rats. Over time, they find how to get into this warm place and create whole labyrinths there, weakening the effect and effectiveness of the insulation.
Exterior finish with insulation
For exterior decoration, any available facade system is suitable. Most often, siding or decorative PVC panels are used that imitate brick or natural stone.
Basement siding "burnt brick"
You can also pick up external protective panels that look like wood. This will make the wooden house stylish.
Installation of any outdoor system is carried out taking into account the requirements specified by the manufacturers. Work should start from the very bottom, installing a guide profile. Further, the rest of the strips are laid on it, which are closed by snapping.
When choosing an exterior finish, it is necessary to look for not only a beautiful material, but also sufficiently durable and moisture resistant.
Internal insulation of a pile-screw foundation
The inner part of the foundation is insulated with expanded clay. It is necessary to dig a small trench near the piles around the entire perimeter of the house, fill it with expanded clay and, if possible, pour a small layer of concrete on top to prevent contamination of this strip of insulation with soil and plant impurities, which eventually destroy the effect of using expanded clay.
It is important to make ventilation holes in the formed basement that will ventilate the underground. This will eliminate the appearance of fungus, rot and early destruction of structures.
Openings must be closed with a grate so that rodents and other pests do not get inside. During the winter, ventilation is usually completely closed. In some cases, it is additionally necessary to take care of the installation of hoods in order to exclude the appearance of moisture in the subfield.
Grillage
As we have already said, a grillage is a tape connecting piles. Rostverk can be:
- metal,
- Concrete.
In the pile foundation there is a grillage, this is, in fact, part of the floor, which means that it must be insulated along with the floor, both from the inside and outside. But waterproofing is carried out at the construction stage. Roofing material, mastic is laid on the grillage or liquid rubber is sprayed. If this is done while not yet under construction, dampness in the house can be substantially avoided.
However, the real insulation of the pile screw foundation is still ahead, because it means the insulation of the floor from the outside and the decorative basement.
Which heater to choose
Insulation is installed only after the construction of the basement.The effectiveness of insulation depends on the correct technological sequence of work
It is important to insulate the pile foundation both from the outside and from the inside.
The thickness of the insulation and its type are assigned after a thermal calculation, which will show the conditions and intensity of cold penetration through the foundation structure.
Most often, mineral wool is used as a heater. When choosing this material, it is necessary to perform an underlying layer for waterproofing.
Roll waterproofing, for example, roofing material, is quite suitable. More advanced insulation can be installed without waterproofing.
If you choose a material that is not afraid of moisture and rodent attack, for example, penoplex, you can significantly reduce the time and cost of installing additional layers. However, penoplex is an expensive material, although it lasts a long time.
Penoplex
Styrofoam is better not to use. It has a rather low strength and, given the features of operation, such insulation will not last long. This will result in additional repair costs.
Work on the base of the pile screw foundation. Part 2 warming
19.09.2017
When building a house on screw piles, an unheated area is formed under the floor of the first floor.
Therefore, the insulation of the foundation on screw piles is an important and necessary process, which is carried out in several ways, based on the type of construction and basement material.
With the help of a warmed plinth, an optimal microclimate in the room is ensured, and energy costs are also significantly reduced.
Thermal protection technology is a simple process that you can do yourself.
To know how to insulate the foundation on screw piles, it is important to study the technological process and follow some recommendations.
Features of insulation
When wondering whether it is necessary to insulate a structure of this type, it is worth considering a number of problems that may arise in case of refusal to carry out work:
- Freezing of water and sewer pipes under the building;
- sweeping snow that melts underground in the spring and forms dampness, which will lead to mold;
- strong cooling of the floor, due to constant drafts.
To make living more cozy and comfortable, it is important to make thermal protection, which will help to eliminate the above problems. What to know how to close the foundation, it is recommended to follow the instructions below
Warming methods
The foundation of a wooden house is insulated with the following options:
- Basement insulation from the outside along the entire length. First, the base frame is constructed from the ground to the base of the walls, then the screw foundation is insulated.
- Lining the base with insulation from the inside. Thermal insulation is carried out from the outside of the floor.
- Solid wood floor insulation on the ground floor.
Before warming, a number of some structural features are taken into account, including the location, the height of the pile columns and the material used.
Process Technology
The work is carried out in the following sequence:
- Arrangement of a brick base or pick-up on a frame with cladding.
- External or internal basement insulation.
It is important to have ventilation products, the functional purpose of which is to constantly ventilate the ceiling.
Material used
Expanded polystyrene is often used to insulate a pile-screw structure, due to its high thermal insulation and sound insulation. The technology of thermal protection provided by panel ceilings using this material is carried out as follows:
- Elimination of cracks from the surface, treatment with a primer mixture, for reliable fixation of insulation sheets.
- After you need to sew up the sheets from the inside, using an adhesive composition or glue-foam.
- Careful "foaming" of the joints of the sheets.
- In order to provide better insulation, the panels are glued in several layers.
- Installation of a metal mesh that will protect the material from various rodents.
If you don’t know how to close the area under the house in order to exclude the possibility of blowing, you can pour soil or expanded clay under the insulated basement. In addition, the insulation of the foundation with foam plastic, foam glass, foam plastic and polyurethane foam is widely known.
Practical Tips
Experienced experts advise adhering to some recommendations on how to properly insulate the base:
- upon completion of the insulation work, it is advisable to wait at least 7 days and only then begin the installation of waterproofing;
- equip ventilation, with a hole distance of 1.5-2 m;
- in order to protect the structure from resolution, the pile supports of the insulated foundation should not move or unscrew;
- to increase the level of strength and reliability of the base, you need to additionally close up a layer of reinforcing mesh;
- with proper work, the space in the middle of the SVF can be used for your own needs;
- work on sheathing a pile screw foundation must be carried out with strict adherence to technology.
Asking the question of how to insulate a pile screw foundation, an experienced builder will answer that strengthening the foundation through thermal insulation is a simple procedure that everyone can do. There is no need to use specialized equipment or learn special skills.
