Roof waterproof, need to consider all aspects of factors. Generally speaking, to prevent roof leakage, design is the premise, material is the foundation, construction is the key, and maintenance management is the guarantee. Only strict control of materials, careful design and careful construction can ensure the quality of roofing waterproofing and create a good life or work for users. The following will give you a detailed introduction of the most commonly used construction methods of top floor waterproof (3 kinds of construction scheme comparison).

The most commonly used construction method for 1. top floor waterproofing (comparison of 3 construction schemes): coiled material roof waterproofing practices

(Although this method is common and simple, the coil is easily lifted by windy weather under thermal expansion and cold contraction over time)

1. The construction of coiled material waterproof layer shall be carried out after the completion of masonry, installation of equipment and pipelines.

2. When paving houses with high and low spans, they should be carried out in the order of first high and then low, first far and then near.

3, in a single span paving, should first paving drainage more concentrated parts (such as water mouth, cornice, inclined ditch, gutter, etc.), according to the elevation from low to high, slope and elevation of the coil should be from bottom to top, so that the coil overlap according to the direction of water flow.

4, coil parallel ridge paving, long side lap is not less than 70mm, short side is not less than 150mm, adjacent two coil short side lap seam should be staggered not less than 500mm, in order to ensure coil lap width and paving straight, paving coil should pop up marking.

5, the slope of more than 25% of the arch roof and the slope under the sunroof, should try to avoid short side overlap.

6. Before the coil is paved, the leveling layer should be dry. The general field test method is to cover 1m2 coil from evening to morning the next day or within about 1-2h on sunny days. If there is no condensation on the inside of the coil, the leveling layer is considered to be basically dry.

The most commonly used construction method of 2. roof waterproof (3 kinds of construction scheme comparison): coating roof waterproof practice

1. Check the leveling layer

1) Check whether the quality of the leveling layer meets the regulations and design requirements, and clean and clean it. If there are defects such as unevenness, sanding, peeling, cracks, and the embedded parts are not firmly fixed, they should be repaired in time. 2) Check whether the dryness of the leveling layer meets the requirements of the waterproof coating used. 3) The next process can be carried out only after it is qualified.

2. Leveling layer treatment

(1) the preparation of leveling layer treatment agent: for solvent-based waterproof coating can be diluted with the corresponding solvent to facilitate penetration.

(2) coating leveling layer: first on the roof nodes, perimeter, corners and other parts of the coating, and then large area coating. Pay attention to uniform coating, thickness is consistent, not to miss coating, in order to enhance the adhesion between the coating and leveling layer.

3. Preparation of waterproof coating

(1) When using two-component waterproof coating, component A and component B shall be stirred evenly before preparation, and then accurately measured in strict accordance with the material mixing ratio provided by the material supplier; The quantity of each preparation shall be calculated and determined according to each coating area, and shall be prepared as required. When mixing, first pour component A liquid into the barrel, then pour component B powder into the barrel, use a portable electric stirrer to stir well and then use it.

(2) Before using the one-component waterproof coating, it can be used only by stirring evenly.

4. Additional enhancement treatment for special parts.

5. Coating waterproof coating

(1) to be leveling layer coating curing after drying, should first carefully check the coating has no pores, bubbles and other quality defects, if not can be coated; if there is, it should be immediately repaired, and then coated.

(2) The facade and node shall be coated first, and then the plane shall be coated. The coating shall be applied according to the requirements determined by the test.

(3) The coating shall be applied in the manner of slitting interval or in the manner of reverse sequence, and the width of the slitting interval shall be consistent with the width of the carcass reinforcement material. After coating, it is strictly forbidden to trample on the coating.

(4) The coating film shall be coated in layers and repeatedly. After the previous coating is dried or cured to form a film, and the surface of each coating layer shall be carefully checked for defects such as bubbles, wrinkles, pits, scratches, etc. before the coating layer can be coated again. The coating direction of each coating layer shall be perpendicular to each other.

(5) The laying of the carcass reinforcement material should be carried out at the same time as the second coating or before the third coating. The former is a wet spreading method, I .e. spreading the carcass reinforcement material while applying waterproof coating and rolling it evenly with a roller brush. The latter is a dry spreading method, I .e. directly laying the carcass reinforcement material after the previous coating is formed, and uniformly scraping the waterproof coating with a rubber scraper on its flattened surface.

(6) According to the design requirements, the second or third layer of carcass reinforcement material can be paved according to the above requirements, and the surface is coated with waterproof coating.

6. Close-up processing

(1) All coating film endings shall be coated with waterproof coating for many times or sealed with sealing material, and the width of the pressing edge shall not be less than 10mm.

(2) The carcass reinforcement material at the closing position shall be trimmed neatly. If there is a groove, it shall be pressed against the groove, and there shall be no defects such as edge warping, wrinkling, whitening, etc.

7. Coating film protective layer

(1) The protective layer of the coating film should be coated with a waterproof coating at the same time, that is, the edge of the coating of waterproof coating evenly spread fine sand and other granules.

(2) When spreading fine sand and other granules on the water emulsion type waterproof coating layer, rolling should be carried out immediately after spreading, so that the protective layer and the coating film can be firmly bonded.

(3) When using light-colored paint as a protective layer, it should be coated after the coating is dried or cured.

8. Inspection, cleaning and acceptance

(1) After the construction of the coating waterproof layer, a comprehensive inspection should be carried out.

(2) After the coating is dried or cured, the fine sand and other powder that is not firmly bonded to the waterproof layer should be cleaned up.

(3) Check whether the drainage system is unblocked and whether there is any leakage.

(4) Acceptance.

The most commonly used construction method for 3. top floor waterproofing (comparison of 3 construction schemes): rigid waterproof roof

1. Construction of clay mortar isolation layer

2. Lime mortar isolation layer construction

3. Cement mortar leveling layer laying coil isolation layer construction

4. Construction of steel mesh

5. Fine stone concrete waterproof layer construction