Waterproofing membrane construction technology

 Content 1:

 1. SBS waterproofing membrane construction technology

1. Grassroots treatment. Before the construction of the coil, the base surface needs to be treated, and the base surface without sanding, concave and convex, and cracks can be paved. At the same time, it is necessary to keep the base surface flat and firm. If the substrate is not treated in advance, the web cannot be laid. Leveling needs to be implemented. After the base work of the building construction is completed, the base layer is treated, and then the membrane is paved. The base layer should be kept dry and the moisture content should be less than 8%. The drainage slope design needs to meet the design requirements.

2. Roll paving. There are two main methods: cold adhesive construction method and hot melt construction method.

 Content 2:

1. Paint treatment: The base must be flat, clean, dry, and the moisture content should be less than 9%, and then the base should be evenly painted with cold base oil, and the construction can be carried out only after drying.

2. Direction of the coil laying sequence: the order should be high first, then low; the same altitude is farther away and then nearer; The same plane is laid out from the low first. When the paving direction is 3C 3% of the surface slope, the paving is parallel to the direction of the roof ridge; When the slope is between 3% and 15%, it is paved parallel or perpendicular to the direction of the ridge; Paving perpendicular to the ridge at a slope of > 15 %.

3. Paving method: (1) hot melt method; (2) Cold adhesion method. Lap treatment: The width of the long-term and longitudinal lap should be ≥ 100 mm for the long side lap, the width of the double-layer waterproof should be ≥ 80 mm, and the single-layer should be ≥ 150 mm and the double-layer should be ≥ 100 mm for the short side lap. At the same time, the paste should be very uniform, no leakage or leakage, and a small amount of excess hot melt asphalt or cold adhesive should be extruded and formed into strips.

 Content 3:

1. What is the construction process of the waterproofing membrane?

1. Cold adhesive construction is to evenly apply adhesive on the construction surface, and then glue the waterproof membrane on the construction surface coated with glue, and wait for a few minutes to compact.

2. Hot-melt construction requires asphalt to be painted on the construction surface, and then heated the construction surface and waterproof material through liquefaction, and then paved with coils.

 Content 4:

1. The surface of the base layer should be compacted and smooth, and when the cement mortar screed layer is used, it must be fully maintained, and there shall be no crisp loosening, sanding, and peeling, which should meet the design requirements.

2. The old and new surface layers must be cleaned up, and there should be no debris and dust, so as not to affect the bonding strength.

 3. The moisture content of the concrete surface should not be greater than 10%

 Content 5:

1. The base layer should be cleaned up, and the surface of the original wall and ground should be solid, and there should be no sand, ash or hollowing.

 2. Clean the root of the upper and lower water pipes and plug the leakage.

3. Use 10-15mm wide masking paper to paste the contour line according to the height of the wall design and construction.