Before the construction of waterproof layer, hot-melt modified asphalt coiled material should be used as additional layer in parapet, impinges mouth, pipe root, cornice, yin and yang angle and other details.

Second, the material transportation

Materials are transported to the construction site and transported to the roof construction site by crane. You can also use pulleys. It is estimated that manual processing is terrible. Try to use mechanized operation to save time.

Third, the shop is stuck coil

The coil thickness meets the design requirements. Cut the asphalt waterproofing membrane into corresponding sizes. When laying, use a flame spray gun to heat the joint between the base and the coil. After heating evenly back and forth, roll and paste the coil forward when the material surface of the coil just melts.

The coiled material parallel to the roof is spread from the cornice to the upper berth, and the coiled material with two-way flowing water slope meets the downstream direction. Starting from the downhill of flowing water, the coiled material shall be laid according to the specifications of coiled material, and the long side of coiled material shall be perpendicular to the slope of flowing water. The coiled material connected between the paving plane and the facade should be carried out from bottom to top.

Fourthly, hot-melt edge sealing.

Use a spray gun to heat the lap joints of the coils, so that they can be firmly bonded while it is hot. Taking the asphalt extruded at the edge as the degree, the end of the coil is embedded with sealing paste.

Five, brush waterproof coating for the first time

Before construction, ensure that the construction site is clean and dry, waterproof coating should be fully coated without omission, firmly combined with the base, and free from cracks and bubbles.

Six, brush the waterproof coating for the second time

Note that there needs to be a certain time interval between the first pass and the second pass of waterproof coating, and the second pass of coating can only be carried out after the first pass of coating is dried, and the specific time depends on the coating. If the interval is too short, the waterproof effect will be greatly reduced.

Seven, laying protective layer

In order to prevent the subsequent construction from damaging the waterproof layer, it is necessary to lay a protective layer on the surface of the waterproof coating. The protective layer shall completely cover the waterproof layer without omission, and be firmly combined with the base layer without cracks, bubbles and shedding.

Extended data:

In the closed water test, the water storage depth should be not less than 20mm, the water storage height is generally 30- 100mm, the water storage time is 24 hours, and there is no obvious drop on the water surface. This kind of test is usually carried out on the roof, bathroom or room with waterproof requirements.

Check the downstairs every 1 hour in the early stage of the closed water test and every 2-3 hours in the later stage. If water leakage is found, the water storage test should be stopped immediately and the waterproof layer should be improved again. The water storage test shall be carried out after the treatment is qualified.

References:

Baidu Baike Roof Waterproof