One way to insulate the floor is to use sawdust. This method has a number of advantages. However, when creating such insulation, you must adhere to certain norms and requirements. Otherwise, the result will not be satisfactory. How to properly insulate the floor with sawdust will be discussed later.
Features of insulation
In your own house during the cold period, a significant part of the heat leaves through the floor. To reduce the amount of heat carriers consumed, the owners should pay attention to creating a high-quality thermal insulation layer. For these purposes, many different materials are used. They differ in the degree of thermal conductivity, durability and cost.
Insulation of the ceiling, floor with sawdust in your own house allows you to get a good result at minimal cost. It is this fact that makes the presented type of thermal insulation popular.
Sawdust is a woodworking productindustry. These are production waste, so their cost is relatively small. At the same time, sawdust has a number of characteristics that allow the use of this material as a heater. However, the material also has disadvantages.
Sawdust quickly absorb moisture and lose their thermal insulation qualities. At the same time, it is a combustible flammable material. Therefore, it is not used in its pure form. They are mixed with other compounds. To get high-quality insulation, you will need to study in detail the installation features.
Varieties of sawdust
According to reviews, floor insulation with sawdust is very effective. However, you need to choose the right material to create thermal insulation. Sawdust may be different. This is recycled wood. Its appearance depends on the chosen processing method. This can be sawing, drilling or planing.
If wood is sawn, it turns out dust. When drilling or planing, chips are produced. Its size is approximately 3-5 cm.
Sawdust fraction can vary significantly. For insulation, material ranging in size from 0.5 to 3 cm is suitable. Such sawdust can be purchased at woodworking enterprises at an affordable price. In this case, the buyer receives an environmentally friendly material. It weighs very little, which reduces the load on the foundation.
Experts note that sawdust of wood species such as pine, oak, ash or spruce is suitable for creating a layer of insulation.
Insulation requirements
Creationfloor insulation with sawdust in a block, frame, wooden or other buildings requires the right choice of materials. It is also important to determine in what conditions the floors will be used. In this case, it is worth considering the purpose of the room, the level of humidity and temperature. It is important to pay attention to the total load on the base of the room.
Before starting construction work, you should also determine how high the thermal insulation layer can be. If the house has already been built, and additional insulation is required, not only the size of the sawdust layer is taken into account, but also all other materials that will be used in the work. Otherwise, the height of the ceilings will be greatly reduced.
Sawdust must have a certain set of characteristics. It is necessary to choose completely dry material. The smell of such sawdust should not be unusual for wood. It is extremely important to treat them with antiseptics and flame retardants before use. After that, the sawdust should dry again with high quality. At the same time, copper sulfate and lime (10%) are added to the composition.
Types of insulation
There are several options for floor insulation with sawdust. Most often, wood blocks are used for these purposes. This is floor insulation with sawdust and cement. These components are mixed in a certain proportion. Copper sulphate is added to the composition. This option is suitable for a new house that is just being built.
Another option is to use pellets. In thatsawdust is mixed with flame retardant, antiseptic and special glue. This is a carboxymethyl cellulonic compound. The result is a granular filler that has high thermal insulation characteristics. Thanks to impregnation, natural material does not ignite, does not rot. It is not susceptible to pest attacks.
Another option for creating insulation from the material presented is the use of sawdust concrete. In this case, coniferous sawdust is mixed with cement, water and sand. The thermal conductivity in this case will be the same as that of cinder concrete.
Other types of insulation
In some cases, the floor is insulated with clay and sawdust. This option is less durable than cement flooring varieties. But the thermal insulation properties of this material are high.
Another option for creating a layer of insulation is the use of wood concrete. It is obtained by mixing sawdust and cement with organic additives. At the same time, plates are created that are characterized by high heat and sound insulation performance. This material does not ignite, but does not like exposure to moisture. The coating is strong and durable. It is used for dry rooms. This requires the use of high-quality hydro and vapor barrier.
A common option is to use sawdust in its pure form. This is a special technology. In this case, you need to take into account a number of nuances.
Insulation reviews
According to reviews, floor insulation with sawdust in a wooden houseor any other structure will be effective only if the installation technology is accurately performed. If you plan to mix wood waste with cement or clay, the work will need to be done quickly. The composition quickly hardens.
One of the most popular ways is to use dry backfill. In this case, it is extremely important to properly prepare sawdust for installation. The fact is that bugs, rodents and other pests can start in natural material. Therefore, in this case, you can not do without an antiseptic. In order for the insulation to meet fire safety requirements, it is treated with a fire retardant.
Also, the material in a humid environment begins to rot. To protect the sawdust from moisture, you need to apply waterproofing. If the fraction was very large, it may compact over time. The thermal insulation properties of the material in this case will noticeably decrease. Therefore, you need to adhere to the established rules for creating an insulating layer.
Dry backfill
Floor insulation with sawdust in a wooden house most often occurs when using dry backfill. In this case, two types of sawdust are required. The first layer is created from a material with a large fraction. Small sawdust will fit on it. In this case, there will be no dust in the house, which constantly appears when using fine-grained backfill.
Also, you can not use only large sawdust. In this case, they cannot be qualitatively compacted. The layer of large sawdust should be about 15 cm. They are rammed, and then covered with a fine fraction. This layer should be the same thickness. To materialbetter compacted, it is permissible to moisten it with a small amount of moisture. When it dries, slag or sand is poured on top. This prevents the processes of decay and the spread of pests inside the insulation.
Instructions
To insulate the floor with sawdust in a wooden house, you will need to perform a number of simple steps. First, woodworking waste is poured with an antiseptic and mixed thoroughly. While this material dries, you need to process the logs with the same composition.
When all the processed materials are dry, a rough floor is laid from the boards. It is waterproofed. Sawdust is poured onto polyethylene with a layer of at least 10 cm. Experienced builders advise soaking sawdust with a solution of lime before this. It is diluted to a liquid state. This procedure prevents decomposition processes.
Also, you can not lay a screed on the sawdust. This material is not strong enough to support her weight.
Insulation dries for at least 2 days. During this time, the sawdust will settle. You will need to add more of them. Some builders simply pour at once a layer 14 cm more than necessary. It is also worth considering proper ventilation. Without this, after a few months, the material will lose its thermal insulation qualities.
Sawdust with cement
If you plan to create a mixture for insulation of cement with sawdust, you need to choose slightly damp shavings for this.
It should be stored for at least a year. The material should not contain foci of fungus, bacteria, decay. Next, the floor is insulated with sawdustlime. Treatment with this antiseptic extends the life of the thermal insulation.
Preparation of backfill with cement
To prepare the mixture, you need to add 20 parts of pre-treated sawdust, 3 parts of dry cement and 2 parts of water. The result is a semi-dry granular insulation. It is necessary to add cement and water in small portions. The solution must not be allowed to solidify. First mix the dry ingredients. Then water is gradually added to them. Undermixed areas should be avoided.
Next, a sand substrate is created. It should be about 10 cm. Waterproofing is laid on it. You also need to treat all wooden elements with an antiseptic. Prepared chips are poured from above. The sand must first be wetted and compacted. When it dries, pour sawdust with cement. The base must mature. It can be covered with boards when the material becomes elastic. In this case, the layer may crackle a little when pressed. It must not fail.
Other options
Floor insulation in a private house with sawdust requires high-quality tamping. The material must not sag after installation. For this, other materials are added to the composition. In addition to cement, there are other compounds that can give sawdust density. For example, it could be plaster.
To prepare the right backfill for the floor, you will need to mix about 85% sawdust (shavings) with 5% gypsum. In the same composition, you need to add 10% lime. If lime paste is used,it will take 2 times more than dry powder. It must be remembered that gypsum crystallizes quickly. Therefore, you can cook a very small amount of filling at a time.
It is for this reason that cement is more often used. It is more plastic, hardens more slowly. If gypsum is used, it is not necessary to dry the sawdust. Insulation will need to be prepared in small portions. It is extremely important to mix the composition thoroughly. Water is added in small portions. After mixing, its sufficiency can be checked by squeezing the backfill in your hand. If it holds its shape after the fingers are unclenched, the material is ready. But at the same time, moisture should not stand out from it in drops.
Clay application
Floor insulation with sawdust can be done by adding clay. In this case, it is important to pay attention to high-quality waterproofing. The plastic film will not be enough. It is better to use special bituminous mastics. If you plan to lay the film, its thickness should be at least 220 microns.
Such material should be well ventilated. At the same time, it should not accumulate condensate. Otherwise, the backfill will not perform the functions assigned to it. Waterproofing must fit snugly to the floor. The film is glued with a special compound. It is overlapped.
Creating a backfill layer from clay and sawdust
Next, the clay is mixed with water. For 100 liters of liquid, you need to add about 5.5 liters of clay. It must be clean, without foreign components. Mixing is carried out by the constructionmixer. To prepare one serving, you need a bucket of clay. Water is added to it. Then sawdust is mixed into the composition to the desired density. This backfill is laid in a layer of 10 cm.
When the floor is insulated with sawdust and clay, the surface cracks when it dries. She needs to be smothered. To do this, use all the same clay. After 13-15 weeks, the layer will mature. It is covered with boards. They must be wide enough. Wooden shields are best suited for these purposes.
Having considered the features of floor insulation with sawdust, you can make high-quality thermal insulation that will last for many years.
