Qualitatively insulating the floor in a wooden house, you will simultaneously make the room more comfortable for living and reduce the cost of heating. Familiarize yourself with the available assortment of thermal insulation materials, learn three basic workflows, select the appropriate option for you and proceed.
Thermal insulation in a wooden house
What material should I choose for insulation?
Content of the article
- 1 What material should I choose for insulation?
- 1.1 Mineral wool
- 1.2 «Dry screed»
- 1.3 Fiberglass
- 1.4 foam
- 1.5 Styrofoam
- 2 instructions for the thermal insulation works in different situations
- 2.1 Warming low underground
- 2.2 sex Warming over a high cellar
- 2.3 Arrangement of a double floor
- 2.4 Video - Warming of a floor in a wooden house
Before proceeding to study the properties of existing insulation, remember: to perform heat insulation slaveyou are recommended only after the wood will shrink, ie,not earlier than six months after the erection of the building. Otherwise, shrinkage may damage the insulation.
Insulation for wooden house
When selecting the material for floor insulation, it is necessary to pay attention to the following characteristics of the insulation:
- thermal conductivity;
- resistance to moisture;
- mounting method;
- thickness;
- weight;
- fire resistance;
- service life;
- environmental friendliness;
- price.
In the case of wooden structures, the most important characteristics are fire resistance and service life.
Upgraded insulation
Mineral wool
Excellent material for floor insulation.
Mineral wool
Advantages:
- low thermal conductivity;
- good fire resistance. Minvat successfully prevents the spread of flame;
- high noise insulation properties;
- vapor permeability. Mineral wool "breathes", which is very important in case of its use for the warming of wooden surfaces;
- simplicity of arrangement;
- is a good environmental friendliness.
It is produced in the form of mats and coils, which makes it possible to choose.
Mineral wool
Main Mineral cotton wool is a low resistance to water. Upon contact with moisture, the heater is deformed and loses its quality characteristics, so the waterproofing layer needs to be given special attention.
| Tech.characteristics of mineral wool | Indices |
|---|---|
| Density | 115 kg / m3 |
| Absorption at full immersion, no more | 1% |
| Average fiber diameter, no more | 0,2 μm |
| Content of non-fibrous inclusions in mass, no more | 4,5% |
| Thermal conductivity at 283 + 1 K, not more than | 0,044 W / m * K |
| Shear strength, not less than | 50 kPa |
| Compressive strength, not less than | 100 kPa |
| Tensile strength, not less than | 150 kPa |
«Dry screed»
Dry screed
The red version of the floor insulation in a wooden house. It can only be used after the shrinkage process has passed through the wood. Screed is made on the basis of gypsum fiber.
Dry screed structure
Key advantages:
- high thermal insulation performance;
- resistance to fire;
- easy installation;
- possibility of use in combination with any finish flooring;
- small thickness;
- good sound insulation performance.
Disadvantages of dry screed
The main lack of is a relatively high cost. Twenty-kilogram bag of the mixture is enough to heat up no more than 1 m2 of surface.
Also, the material does not tolerate the effects of moisture. Because of it, it deforms. On the heat-insulating properties of the material, such deformation is not reflected in any way, but the finish flooring can deteriorate.
Steklovata
Steklovata
Popular material for floor insulation. Advantages of are as follows:
- incombustibility;
- simplicity of arrangement;
- environmental safety.
Characteristics of glass wool
The main disadvantage of is substantial shrinkage. In just a year of service, the meter glass wool band can be reduced by 10-15 cm. As a result, the integrity of the thermal insulation layer is disrupted. Also to number of lacks it is necessary to carry weak resistance to influence of water and not the best теплоизоляционные properties.
Polyfoam
Structural structure of PSB-C 35
One of the most popular heaters. It is characterized by an optimal ratio of cost and quality.
The material is not deformed under the influence of temperature jumps and high humidity. Even with a relatively small thickness( up to 10 cm), the foam provides high-quality thermal insulation.
The main lack of is brittleness. To ensure that the material has served as long as possible, the arrangement of the insulating "pie" must be done perfectly.
Characteristics of the foam
Important! Polyfoam does not let air through. This may not have the best effect on the condition of the wood. Be sure to consider this nuance.
Expanded polystyrene
Styrofoam
Technical characteristics of plates from extruded polystyrene foam
This insulation has many advantages, including:
- resistance to fire, moisture and temperature changes;
- incredibly low thermal conductivity;
- high noise insulation properties;
- excellent strength.
The main lack of is a relatively high cost.
Comparison of insulation
Instructions for carrying out thermal insulation work in different situations
The design of the floor of a wooden house can have a wide variety of views. Therefore, the order of carrying out thermal insulation works will also differ. Your attention is offered instructions for warming in the most common cases.
Insulation at low underground
Insulation at low ground
Due to the limited height of the subfloor, the insulation can not be fixed from below on the lags. This leads to the need to dismantle the available flooring, which makes this method the most laborious.
In general, the work is done in this order.
The first step. Remove the skirting boards and flooring elements. If the replacement of the flooring is not included in your plans, work as carefully as possible. For more convenience, sign the boards to avoid problems during their reverse installation.
Learn the status of the
log. The second step. Study the status of the log. Remove the decayed and deformed areas.
How rotten lags look like
Instead of the removed elements, install pieces of the same size. For bonding parts of the structure, use wooden boards and galvanized screws.
Wood floor support and logs
Third step. Attach a support bar from the bottom of each leg.
How to repair lags
Fourth step. Prepare the lumber for the arrangement of the rough flooring. Good unedged board. Saw it into pieces 10-20 mm long less than the lag mounting step - the flooring elements should be laid fairly freely.
Uncut board for rough floor
Fifth step .Collect the rough floor. You do not need to fix the boards to the support bars.
Mounting the rough floor
The sixth step .Cover the floor and lag with vapor barrier material. If the structure is located on the territory with high groundwater, instead of the vapor barrier, lay the waterproofing - pergamin or roofing material. Isolate with a 10-15-cm overlap on the walls. Joints of individual strips of material should be glued with adhesive tape.
Steam insulation
The seventh step. Install the lagging floor. Place the selected insulation material. Eighth step.
. Cover the insulation with a second layer of steam or waterproofing.
Cover the insulation with a second layer of steam or waterproofing
Ninth step. Fit the slats of the counterbridge to create a ventilation gap between the insulation "cake" and the finish flooring. The recommended gap thickness is 20 mm.
Floor device
Tenth step. Carry out a reverse installation of the previously dismantled floorboards or mount a new flooring.
| Thickness of the floor board, mm | Distance between the lags, cm |
|---|---|
| 20 | 30 |
| 24 | 40 |
| 30 | 50 |
| 35 | 60 |
| 40 | 70 |
| 45 | 80 |
| 50 | 100 |
Laying of the dowel board
Fastening the parquet boards to the ladders
Warming the floor above the high cellar
In this case, you can go for a trick and perform insulation from the cellar.
Principle of thermal insulation
The first step. Go down to the cellar. Attach a moisture barrier film to the ceiling.
The second step is .Nail to the sides of the beams thin rails or a support beam. If the cellar is wet, use a zinc-plated profile instead of the bar.
The third step. Cut the heater( it is best to use mineral wool) in parts with a width of 20-30 mm more than the pitch of the installation of the log. Due to the increased width of the insulation plate, the gyroscopes will be placed and additionally fixed.
Fourth step. Fit to the previously fixed beam( profile, slats) cross bars to maintain the insulation layer.
How to insulate the ceiling with foam in the basement
The fifth step. Attach a waterproofing foil to the slats.
The sixth step. Fit the finish coat to your liking.
If you want to insulate the floor from the living area, work in the same way - the "pie" will consist of the same layers.
Double floor installation
Suitable for rooms with high ceilings. The insulating structure will take 12-20 cm of useful space.
Work in the following order.
The first step. Remove the skirting boards, replace the damaged wooden support elements, fill the existing slots with mounting foam.
The second step. Fix wooden logs in increments of up to 90 cm. Optimal is the installation step of the order of 60-70 cm.
Schematic diagram
Third step. Make sure that the top edges of the logs are horizontal. If there are deviations from the horizontal line, dispose of surplus timber with a plane. In places with missing height, place pieces of wood, roofing material or other suitable material under the beam.
Fastening the log to the concrete floor
Fourth step. Cover the surface of the base with steam or moisture insulating material with a 10-15 cm overlap on the walls.
The fifth step. Place the selected insulation in the space between the lags.
Heater
The sixth step. Cover the thermal insulation layer with a waterproofing film.
The seventh step is .Mount the flooring elements.
The eighth step. Lay the selected cover and mount the skirting boards.
Double floors in the
cut Important! If the wooden house is on a screw, bored or pile foundation, it is necessary to additionally mount windproof material. It is installed on the outside of the thermal insulation layer.
Now you have all the necessary knowledge to independently perform the insulation of the floor in a wooden house.
Have fun!
