How to insulate an attic with his own hands - step by step guide

By Admin | Construction & Tips
12 April 2016

If we neglect the warming room, located under the roof of the house, or do not, as it should, then the trouble will not be gathered.The cold winter wind will blow in the gap, and the moisture will accumulate in the form of condensation on the rafters and ceiling.As a result, the tree will begin to mold and rot.And still have to sink more because the heat will be partly to escape through the roof.Therefore it is better to provide for all in advance, knowing how to properly insulate the attic and did not make mistakes in the process.So, read on.

Warming of the attic with his own hands


  1. What material is better to use
  2. insulation attic stages
  3. produce the formation of solid insulated circuit
  4. Protecting insulation from the wind, rain and evaporation
  5. Video: Design and attic insulation

What material is better to use a good thermal insulator

produced today is not so little.The most popular are, fiberglass and mineral wool.That is, they are us

ed more often when the attic insulation.

fiberglass material - the cheapest.It is good because it does not burn, does not contain harmful ingredients and organic substances.If the glass tight to the bottom, it retains heat very well.But this happens only if the installation of the design made in compliance with all intricacies of technology.

Have a glass wool and material weaknesses.First of all, it is the presence of fine dust from the debris of glass fibers.It is very dangerous if such dust gets in your eyes.It is not necessary to prevent splashing it on your skin - it will start to itch and scratch appeared to be a long time to heal.And when glass shards floating in the air, nothing good comes out of it.That and look, inhale the dust.But if you put on a respirator or mask construction, nothing terrible will happen.And uncomfortable glass wool used for insulation of walls arranged at an angle - because after a while the heater stops tightly against him.

wool mineral basalt fibers in many respects shows better results than wool.Its natural ingredients effectively supplemented with synthetic, and as a result achieved the necessary balance.This material is lightweight and can inflict injury such as fiberglass.Therefore, for private home attic insulation to use this rather than glass wool.And it is very well insulated for noise protection plasterboard partitions.After all, it is much better to delay the sound than the wool of the glass filaments.

experienced professional builder who has long been lagging, not a long time to think.On the question of how to insulate the attic with his hands, he will say that it is best to use rock wool of basalt fibers.Let it be a bit more expensive, but safer and more reliable operation.So often there is a sense is still not considered a penny, and choose the best option.

Mineral wool is manufactured generally in the form of plates or square shape, or in the form of webs rolled into large rolls.That carpet is convenient to insulate the horizontal surface, and plates are well used where a vertical surface are arranged at an angle.

attic insulation gradually

First we need to insulate the structure around the perimeter of the room.The next step will be necessary to make the protection of insulation against moisture and vapor barrier organize and ventilation around the heater circuit.

  • See material: Vapor - a party to a heater it correctly install and use other features of membranes

produce the formation of solid insulated circuit

layer of insulation should be laid on the roof, floors and walls.If there is a pediment, it is necessary to insulate him.

# 1. roof insulation.

Since the eaves at the attic under a slope, they should be laid material does not change with time, shape and size.Therefore, when deciding how to insulate the roof attic, better not take continuous web basalt wool, and sliced ​​(for example, in the form of plates).They are in the process of isolation can be easily interconnected.In order to reliably insulate the roof, plate heat insulator tightly inserted between its rafters.In addition, insulation is placed under the rafters or above them.At the same time it keeps the crate as shown.

Picture 1

If the width of the plate insufficient and remains a gap, then it is filled with the cut on the line with a knife strip of material.This adds 2 centimeters or 2.5 with the expectation that the stone wool may eventually shrink slightly.The resulting piece is necessary to force to drive into the space between the slab and the rafters.

is very important to carefully consider and implement such complex insulation elements such as horse, overhangs, valley.There, where the plane of the roof changes its form, we must try to dock well all the details of a heater.Since closure of the thermal insulation provided by the circuit.Details shown on these two figures.

Warming near the ridge

Warming of the valley

also should be treated very carefully to the point of connection of the roof to the walls and openings for windows.To avoid freezing, the windows of the attic should be insulated with material of sufficient thickness, as shown in Figure 4.

Warming of the attic window

Regarding the eaves, then it provide moisture protection, as well as ventilation holes.How do you see the following figure.

Thermal insulation of the roof overhang

# 2. Warming floors.

When building a house with a loft can be used three types of floors.Therefore, in this place of the attic insulation is carried out with their hands in one of three ways.

  • If the floors are made of reinforced concrete floors - self-leveling or tiling, it requires the use of highly durable thermal insulator.Not only that - he should also possess a good sound insulation.Therefore, in this case, the best option is to use a foam polystyrene material.

Floor insulation polystyrene

  • If floors are made of reinforced concrete floors - wooden, roofed by a lag, it can be used for warming plates from basalt fibers.In the corners of the room leaves a hole for ventilation.To other sounds did not penetrate through the ceiling, put the logs on special gaskets made of soundproofing material, see figure.


  • If the floors are made of wooden beams, some of these beams or under them do subfloor.The insulation material, in turn, is placed on the floor.In addition, it is necessary to provide moisture protection layer, as shown in the figure.


on a flat surface placed horizontally, it is best to use rolled insulation.He rolled across the plane at the same time plugging the gap between the rafters.

# 3. Warming pediment.

For gable also used three methods of thermal insulation, which depend on the structure of the building.

  • So, if the house is built using a layered masonry, the thermal insulator lay inside of masonry.Outside, he is facing, and inside - bearing wall.This is best used in the form of basalt wool slabs.Vapor barrier lay in the case when calculated according to the insulation will absorb water.
  • Technology "ventilated facade" also provides for the use of slabs of basalt fiber.Between them and the liner must be space from 4 to 15 centimeters.That in the attic did not blow, and the insulation does not get wet, assemble a special membrane.It protects from the rain, wind and see. Figure 8.

Insulation of ventilated facade

  • If we have a plaster facade, it is possible to take the insulation or expanded polystyrene or tiled stone wool.In this case, the important geometrical stability and strength forms.

In the absence of external insulation of walls frantonov can apply the internal wall insulation, how to do it correctly, see the article:

# 4. Warming partitions.

Wondering what to insulate the attic from inside and think about the isolation of its walls.The best thing to do is mineral wool slabs - will design light enough non-combustible, perfectly preserves the heat.These partitions typically make the chassis with runners, which perform the role of bearing shell parts.This facilitates the laying of insulation.Plates of mineral wool or placed along these rails or vraspor.It should be noted that this works out well and the sound is muted.For better sound suppression between the wall and the floor is placed a layer of soundproofing see. Illustration.

Thermal insulation of walls

Protecting insulation from the wind, rain and evaporation

To insulator served long without losing its properties, it is necessary to build both above and below the waterproofing layer.Do not forget about ventilation.To layer of insulation does not get wet from the condensation of vapor in contact with the cold surface provides for a vapor barrier.It does not allow diffusion of the vapor outside.As a result, the insulation remains dry and the walls from the rafters do not rot and moldy.Waterproofing layer not only protects against moisture, but the wind does not blow warm cm. Illustration.


Water trapped on the roof after the rain or snow, it is expelled by a two-level ventilation.Its first level is located between the waterproofing and roofing material, and the second - between the insulator and the waterproofing layer.Intakes made on the overhang, and the output - on the ridge of the roof.To insulation material is well ventilated, in the water-resistant film has a special ventilation device, see. Illustration.


distance between the roof and the waterproof film should be not less than 2 centimeters, otherwise condensation will wet insulation.To fix mounted special kontrbrusy film, the height of which is not less than 2.4 centimeters.The film should not be tight, otherwise it when the temperature of air can burst under the weight of falling water.

very convenient to use special superdiffuzionnye membrane - making their use more than one level of ventilation.In this case, only one layer of hydro and wind insulation, which is located above the heater.A layer of air between the membrane and thermal insulator is no longer needed.

And now another tip for those who want to know how to properly insulate the attic from inside.The inner walls of the room, which is located under the roof, you need to cover the film to the vapor barrier.Fastened it for staplers, and the joints carefully sealed with a special tape designed for such a film.

Basalt wool covered with vapor barrier membrane.

So, when you consider all of these recommendations, to choose the right material and fulfill everything in the correct sequence, the result is sure to please.And you can be sure that your attic or the cold wind did not penetrate, nor sleet her not promochat.

Video: Design and attic insulation

  • reviews and experience in the use of insulation basalt wool

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