The top layer of the roof should no longer be waterproofed

Comparison with rigid waterproof materials: General rigid waterproof materials.

Dear, that's for sure The top floor decoration must do a good job of waterproofing, and the top surface must not be waterproof in order to save money, otherwise once the roof appears to prevent the water layer of the macro bureau car is not firm and leaks, it will cause very serious consequences. Therefore, when the top floor is decorated, the waterproofing work must be done. So what should be done to decorate the top floor waterproof?

The specific construction methods are as follows: 1. Clean the roof base layer and clean the dust on the surface of the top floor. 2. Brush nano-level sealing primer to resist acid, alkali and salt.

3. Flexible waterproof material with an elongation of more than 300% at break. 4. Lay waterproof cloth and choose a rainproof cloth that is environmentally friendly and has super tensile strength. 5. Brush the waterproof material on the cloth, at least twice.

If the waterproof requirements are relatively high, you can repeat the second to fifth steps and do it again, and there will be no problem for about 25 years. The above is the top floor decoration to do waterproofing, and how to repair the top floor waterproofing. For the owners of the house purchased on the top floor, it is necessary to do a good job of waterproofing the house as soon as they leave.

The indoor roof of the top floor does not need to be waterproofed, and the general waterproofing is to sit on the waterfront surface, and the backwater surface does not need to be waterproofed, and the effect of backwater waterproofing is not very good. Generally, it is enough to have the waterproof of the roof, and as long as it is regularly maintained, the waterproof layer of the top floor will generally not leak.

Exterior wall waterproof construction step 1, clean up the base, the old and new surface layers must be cleaned, there must be no debris and dust, so as not to affect the bonding strength, the base layer should be dry when brushing waterproof coatings. After the completion of the grassroots cleaning process, next, clean up the dead corners, that is, the so-called yin and yang corners, construction joints, expansion joints and other more important parts for treatment, especially pay attention to the drain holes to strengthen the treatment, need to be painted 2-3 times waterproof base coating.

2. Prepare waterproof membrane, waterproof coating, base coating and adhesive membrane coating must be distinguished, in order to improve the adhesion of waterproof membrane and base layer, the bottom layer can be repeatedly brushed, evenly brushed, and completely covered.

3. The waterproof coating must be proportioned in accordance with the product instructions, according to the ratio of a:b=2:1, the stirring time is about 3--5, and stir until the mixed liquid of the two components of A and B is uniform.

4. The waterproof coating that is stirred evenly will be painted according to the area to be painted on the site, and the base layer should be larger than the area of the adhesive coil, not more than 30. Before brushing the second coating, you must wait for the paint to completely solidify before you can paint again, and the bottom coating is about 4-8 after the brushing.

5. When bonding the coil, it is necessary to wait for the second coating to completely solidify before construction.

What is the cause of water leakage on the exterior wall 1, in the construction process of the building wall, the mortar of the leveling layer and the plastering layer is not configured in accordance with the standard collapse design, which then causes the change of mortar strength, and the leakage of the wall is caused by the occurrence of dry shrinkage cracking problem, and the leakage caused by the loose sealing around the door and window openings, most of the doors and windows of the building are made of aluminum alloy, plastic steel, and white steel due to temperature changes. Leakage due to lack of sealing material or poor sealing and poor quality of sealing material.

2. Because of the uncoordinated brick masonry and concrete components under the action of temperature, the external wall cracks are caused, resulting in water leakage, which mainly occurs in the window wall, gable wall and parapet root of the top floor of the long building.

3. The uneven settlement of the foundation will also cause water seepage in the wall, which also occurs in the case of temperature changes, especially in the cold winter, which is prone to this kind of problem.

4. Leakage caused by poor exterior wall decoration construction, the exterior wall plastering lattice joints are not intersected, uneven or the mortar residue is not cleaned so that the rainwater accumulates in the lattice joints, and the lattice strips are embedded too deeply, so that the plastering thickness at the bottom of the lattice is not enough, and the rainwater seeps into the wall; The holes and gaps in the wall were not carefully blocked before the bricks were glued to the exterior wall; The joints between the facing bricks are not serious or the mortar is low to form capillaries, and leakage occurs under the action of wind pressure.

Roof waterproofing practice steps:

1. Grassroots treatment.

Check the quality and dryness of the screed floor and clean it, and apply the base treatment agent after meeting the requirements to ensure that the size of the brushing area can meet the construction needs of the day. After 4 hours of painting, the coil can be laid.

2. Construction process.

Cleaning and repairing the surface of the base layer Coating the base treatment agent Additional enhancement treatment at the node Positioning, elastic line, trial paving Paving coil Closing treatment, node sealing Cleaning, inspection, trimming Protective layer construction.

3. Construction sequence.

During the construction of the waterproof layer, the nodes, additional layers and roof drainage should be treated first, and then the construction should be carried out from the lowest elevation of the roof. When paving the gutter and cornice membrane, it is advisable to follow the direction of the gutter and cornice to reduce lapping. During the construction, the construction is carried out according to the principle of high and low, far and near.

4. Lap method.

When paving the coil, the lap joint method is adopted, the lap joints of the adjacent two coils should be staggered, the lap joints of the sloped roof at the steel roof truss are lapped in the direction of the flowing water, and the joints perpendicular to the direction of the roof ridge are lapped in the direction of the dominant wind.

How to choose roofing waterproofing materials:

1. The material has good weather resistance (can withstand the test of climate), and has a certain bearing capacity to light, heat, ozone, etc.

2. The material has water penetration resistance and acid and alkali resistance.

3. It has certain adaptability to external temperature and external force, and the tensile strength of the material should be high, and it can withstand the deformation caused by temperature difference changes and various external forces and the expansion and cracking of the base layer.

4. Good integrity, which can not only maintain its own cohesiveness, but also firmly bond with the base layer to form a stable impermeable whole.

Summary. 1. Use cement mortar to level the roof base. 2. After the ground is cleaned, paint the base layer more than twice with polyurethane waterproof coating.

3. Use a large roller brush to apply the base treatment agent on the base layer. 4. Four hours later, the waterproof membrane is paved on the roof base, and at the same time, a flame spray gun needs to be used to heat the connection between the membrane and the base layer. 5. Use a spray gun to heat the coil at the connection position to make it firmly bonded, and apply sealing paste at the end to keep it tight.

6. Carry out water storage test.

How to make a waterproofing layer for a roof?

1. Use cement mortar to level the roof base. 2. After the ground is cleaned, paint the base layer more than twice with polyurethane waterproof coating. 3. Use a large roller brush to apply the base treatment agent on the base layer.

4. Four hours later, the waterproof membrane is paved on the roof base, and at the same time, a flame spray gun needs to be used to heat the connection between the membrane and the base layer. 5. Use a spray gun to heat the coil at the connection position to make it firmly bonded, and apply sealing paste at the end to keep it tight. 6. Carry out water storage test.

If the roof waterproof layer construction is carried out in summer, then when the weather temperature exceeds 35 degrees, the roof waterproof layer construction cannot be carried out, because if the weather temperature is too high that day, it will cause the water to volatilize too quickly, so that the waterproof layer will crack the painting.