How does the vapor barrier work, the way to do the vapor barrier

First, the practice of moisture barrier.

1) Waterproofing mortar.

Moisture-proof layer: Wipe a layer of 20mm or 30mm thick 1:3 cement mortar at the position of the moisture-proof layer.

waterproofing mortar prepared with 5 waterproofing agent; It is also possible to use waterproof mortar to build 4-6 skin bricks, which are located above and below the indoor floor. The use of waterproof mortar as a moisture-proof layer is more suitable for buildings with seismic fortification requirements.

2) Linoleum.

Moisture-proof layer: Wipe a 20mm thick mortar screed layer on the moisture-proof layer.

Then dry lay a layer of linoleum or stick a felt and two oils with hot asphalt. Linoleum is the same width as the wall thickness, laid along the length, lap length loomm. Linoleum moisture-proof layer has a certain toughness, extensibility and good moisture-proof performance, but it is easy to age and fail over time, and at the same time, because the linoleum layer reduces the adhesion between the upper and lower brick masonry, thereby weakening the seismic ability of the brick wall.

3) Fine stone concrete.

Moisture-proof layer uses the characteristics of good concrete compactness, certain waterproof performance, and can be combined with masonry, and commonly used 60mm thick reinforced fine stone concrete moisture-proof belt. This practice is suitable for buildings with high overall stiffness requirements.

4) Vertical moisture-proof layer For the vertical wall surface of the indoor floor of the room, in addition to the upper and lower horizontal moisture-proof layers, this vertical wall (on the side of the fill) is first plastered with cement mortar and brushed with cold bottom oil.

one, and then brush two hot asphalt; It is also possible to use the practice of plastering with mortar mixed with waterproofing agent, and the other side of the wall requires the plastering of the wall with cement mortar.

Second, the construction of the moisture-proof layer:

1. Waterproof mortar moisture-proof layer, using 1:2 cement mortar and cement dosage 3% 5 waterproofing agent, thickness of 20 25mm or waterproof mortar to build three bricks as a moisture-proof layer. This method is simple in structure, but when the mortar is cracked or not full, it affects the moisture-proof effect.

2. The fine stone concrete moisture-proof layer is made of 60mm thick fine stone concrete belt, which is equipped with three 6 steel bars, and its moisture-proof performance is good.

3. Linoleum moisture-proof layer, first wipe 20mm thick cement mortar leveling layer, and lay one felt and two oils, which has a good waterproof effect, but there is linoleum isolation, which weakens the integrity of the brick wall, and should not be used in the high stiffness requirements or ** area. If the base of the wall is made of impermeable material (such as stone or concrete, etc.), or if it is made of reinforced concrete.

When the geosphere beam, there can be no moisture-proof layer.

According to the location: there is a horizontal vapor barrier, and a vertical moisture barrier.

There are rigid and flexible.

Rigid, often use cement mortar or waterproof powder for plastering, located at the elevation of the wall masonry, is a layer of mortar similar to the screed layer of the practice. Set it on the exterior wall, and do 20 thick plastering directly on the wall.

Flexible, commonly used linoleum, vertical, paved on the vertical plane, horizontal paved on the horizontal plane, but the seismic fortification of masonry is limited.

Hope it solves your problem.

The bottom gravel, the gravel is covered with fine carbon, and then a layer of asbestos is made of bitumen and linen to make face.

There are four ways to do the vapor barrier, which are:

1.Waterproof mortar moisture-proof layer: a layer of 20 mm or 30 mm thick is smeared at the position of the moisture-proof layer, and the waterproof mortar prepared with 1:3 cement mortar mixed with 5% waterproofing agent is suitable for spine buildings with seismic residual fortification requirements;

2.Linoleum moisture-proof layer: first wipe a 20 mm thick mortar screed layer at the moisture-proof layer, and then dry the cherry blossom cloth and lay a layer of linoleum or paste a felt and two oils with hot asphalt, which has a certain toughness, extensibility and good moisture-proof performance;

3.Fine stone concrete moisture-proof layer: using the characteristics of good concrete compactness, waterproof performance, and can be combined with masonry, 60 mm thick reinforced fine stone concrete moisture-proof belt is commonly used, which is suitable for buildings with high overall stiffness requirements;

4.Vertical moisture-proof layer: for the vertical wall of the indoor floor of the room, in addition to setting up the upper and lower two horizontal moisture-proof layers, this vertical wall is first plastered with cement mortar, brushed with cold bottom oil, and then brushed with hot asphalt twice, and can also be mixed with waterproofing agent Mortar plastering, and the other side of the wall requires the wall plastering of cement mortar.

Vapor barrier to the wall.

Function: Prevent the moisture in the soil from rising along the foundation, so as to prevent the ground water located at the foot from seeping into the wall and causing the wall to become damp. It can improve the durability of the building and keep the room dry and hygienic. In the structural form, there are two forms: horizontal moisture barrier and vertical moisture barrier.

Location: 1) Prevent rain from splashing the wall;

2) When the ground cushion is a permeable material (such as gravel, slag, etc.), the position of the horizontal moisture-proof layer should be level or higher than the indoor floor.

where there is a skin of bricks, i.e. at +0 060m;

3) When there is a height difference between the indoor ground between two adjacent rooms, two horizontal moisture-proof layers should be set up in the wall, and a vertical moisture-proof layer should be set on the side of the soil, so as to connect the two horizontal moisture-proof layers to avoid the moisture in the backfill from invading the wall.

Method: 1) Waterproof mortar moisture-proof layer: it is suitable for earthquake-resistant areas, independent brick columns and brick masonry with large vibration, its integrity is good, seismic ability is strong, but mortar is brittle and easy to crack material, in the foundation uneven settlement caused by the wall cracking or mortar paving is not full will affect the moisture-proof effect.

2) Fine stone concrete moisture-proof layer: it is suitable for buildings with high overall stiffness requirements, but it is better to combine waterproof requirements and structural practices.

3) Replace the moisture-proof layer with reinforced concrete foundation ring beams.

4) the practice of vertical moisture-proof layer: on the wall surface (by the backfill side) that needs to be set up with a vertical moisture-proof layer, first plastered with 1:2 cement mortar, 15 20mm thick, and then brush a cold base oil, brush two hot asphalt; It can also be directly used with doped 3 5

Waterproofing agent mortar plastering 15-20 thick practice.

The horizontal moisture-proof layer is generally arranged in the outer wall wall, and the cement mortar is generally mixed with 5% waterproof powder 20mm thick or the membrane waterproof layer is used to make it in the wall, higher than the outdoor floor, located in the middle of the indoor stratum dense material cushion (such as concrete cushion), and the indoor floor (below 60mm; The vertical moisture-proof layer is generally set on the waterfront surface of the exterior wall, and the cement mortar is mixed with 5% waterproof powder 20mm thick, and then painted with asphalt oil twice, and the membrane waterproof layer can also be made on the waterfront surface.

There are three types of placement of the vapor barrier:

1) When the indoor ground cushion is an impervious layer (such as concrete), it is usually set at the elevation. And it is at least 150mm higher than the outdoor floor to prevent rain from splashing the wall.

2) When the indoor ground cushion is a permeable layer (such as gravel, slag, etc.), it is usually set at the + elevation.

3) When there is a height difference between the indoor ground between two adjacent rooms, two horizontal moisture-proof layers should be set in the wall, and a vertical moisture-proof layer should be set on the first layer near the soil.

Indoor flooring refers to the floor construction layer after leveling (excavation or filling) on the original foundation. The construction layer is divided into the original soil layer, the base layer, the middle layer, the surface layer, etc.

In order to prevent the moisture in the soil from entering the wall due to the action of capillaries, the continuous waterproof layer set in the wall is called the wall moisture-proof layer. The construction methods of the moisture-proof layer include waterproof mortar moisture-proof layer, fine stone concrete moisture-proof layer and linoleum moisture-proof layer. The location of the vapor barrier is related to the ground conditions.

When the indoor ground is a solid paved structure, the position of the external wall moisture-proof layer should be located above the outdoor ground and between the upper and lower surfaces of the concrete cushion of the first floor of the indoor ground, generally 60mm below the indoor ground. When there is a height difference between the ground on both sides of the inner wall, the moisture-proof layer is set at 60mm below the ground on both sides, and a vertical moisture-proof layer is added on the soil side of the wall between the two moisture-proof layers.

According to the current housing construction standards, the location of the waterproofing layer should be mainly located in the toilet and balcony. Generally, it is necessary to go to the ground meters, which is the height that can make an effect.

What house? If it is a ground floor house, make a moisture barrier layer where the foundation is out of the ground.

If you want to lay bricks, you can make a few bricks.

According to the local humidity to determine, the damp one is made in two more layers.

Cement mortar with a few percent waterproof powder, there is a manual.

1. If it is only a partition moisture-proof, in many cases, it is not possible to completely isolate the moisture outdoors, in fact, the most popular method is the practice of external moisture-proof and partition moisture-proof, the specific method is to make mortar waterproof on the wall, the moisture partition is not uploaded, and the exterior of the wall is smeared with waterproof mortar or waterproof membrane.

2. There are many ways to divide the inside and outside, the outside is easy to do, the outside is waterproof, and the inside is easy to do the inside waterproof. Generally, the internal waterproof is mainly anti-groundwater, and the external waterproof is waterproof and rain-proof.

How to make the vapor barrier, the instructions are as follows:

1. There are roughly four ways to make the basic moisture-proof layer.

2. Wipe 20mm thick 1:2 cement mortar (mixed with appropriate amount of waterproofing agent).

3. M10 cement mortar masonry two bricks and three joints; 60mm thick C15 or C20 concrete ring beam.

How to make a moisture-proof layer, described as follows: 1. The foundation moisture-proof layer should be laid with 1: cement mortar plus 3% 5% waterproofing agent, and its thickness is generally 20mm.

Non-seismic fortification areas can also use waterproofing membrane as the basic moisture-proof layer. 2. For buildings in seismic fortification areas, linoleum should not be used as the horizontal moisture-proof layer of the foundation wall, because this will form a separation phenomenon between masonry there, which will have an adverse impact on the seismic ability of masonry. 3. The horizontal moisture-proof layer is arranged at the concrete structure layer of the indoor floor.

Related instructions: waterproof coating can not be used as the basic moisture-proof layer, because the cement in the masonry mortar on it releases a strong alkali in the process of hydration heat and the acid in the waterproof coating to cause a chemical reaction, which destroys the waterproof coating layer and does not play a moisture-proof role. Vapor barrier, a layer of material that is set up to prevent moisture from the soil below the ground from entering the brick wall.

Moisture-proof layer structure scheme: vapor barrier film + insulation layer + waterproof and breathable membrane. The vapor barrier film slows down the rate of indoor water vapor discharge to the insulation layer, and effectively prevents the formation of condensation, so that the waterproof vapor permeable membrane can effectively discharge the water vapor of the insulation layer quickly, protect and maintain the thermal performance of the structure, so as to achieve the purpose of saving energy consumption.