Before the construction of root blocking copper base, the roof needs to be treated, mainly to clean the roof garbage and remove the redundant cement lumps on the roof. There are two situations for the cleaning of the old house roof: the old roof surface has a waterproof layer and the old house surface has no waterproof layer. The two kinds of roofs have different treatment methods before the construction of hot-melt waterproof coiled materials.

There is no waterproof layer on the surface of the old house, so it is only necessary to clean the roof and clear the uneven cement lumps. After the roof is cleaned, a layer of cold primer shall be painted on the roof, and a waterproof coating with auxiliary bonding made by equipment with a variety of additives as auxiliary materials. The cold primer can increase the adhesion between the roof and the waterproof roll.

The roof of the old house has a waterproof layer, which is also to clean the roof first. Then check the original waterproof layer to see if there is any bulge, and cut it with a wallpaper knife. According to the waterproof construction experience, the hot-melt waterproof coiled material is mostly used for the waterproof repair of the old roof. The coiled material and the coiled material will be stronger after high temperature bonding, so it is not necessary to brush the cold primer.

In the whole roof waterproof construction, the blocking copper base shall be constructed from the bottom to the top, that is, from the roof water hole to the top. Generally, it is necessary to turn 50 cm on the parapet wall, so the felt cannot be laid straight, and the coiled material needs to be cut off about 1.5 meters for hot-melt pasting. After the parapet near the water hole is finished, it can be paved straight. Put a whole bundle of coiled materials on one end, cut the seal, and roll the coiled materials to the opposite side until it reaches the opposite parapet.

For the released coiled material, we need one person to stand at one end of the coiled material, and the other person to swing the coiled material at the other end, so that the coiled material is not skewed. The crimping between the coiled material and the previous felt is 10~15cm, not less than 10cm. If the crimping between the coiled material and the coiled material is too small, it is easy to cause water leakage in the later stage. After confirming the coiled material and the crimping of the coiled material, roll the coiled material back from one end to half of the whole bundle of coiled material. The rolled back half has been rolled into a cylinder of one meter.

At this time, you can ignite the fire and use the spray gun to start baking the coiled material. Stand on top of the coiled material and use the spray gun to bake half of the coiled material. Move the coiled material forward with your feet while baking. Do not push the coiled material too far at one time, just move 15 cm at a time. The blocking copper base should not be baked too old or too light, and the oil will be baked too old.

When baking the coiled material, walking on it will squeeze the oil, resulting in the thin, thick and uneven coiled material, which is easy to leak. It is too light to bake, and the adhesive force is not strong, and it is also easy to leak. It is better to bake the coiled material until it is greased and does not flow, so that the adhesive force is good. In this way, one felt after another is made from bottom to top. It is better to have a little grease on both sides of the baked coil.