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    Home > Coatings News > Paints and Coatings Market > Where does waterproof coil generally leak? Summary and prevention measures

    Where does waterproof coil generally leak? Summary and prevention measures

    • Last Update: 2020-11-23
    • Source: Internet
    • Author: User
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    First, the coil waterproof bubble
    (i) phenomenon:
    coils after the spread of the bubbles found, generally from small to large, with the increase in temperature, the number and size of bubbles increased.
    (ii) reason analysis:
    grass is not dry, the surface is not swept clean, the bottom of the waterproof layer has water vapor seeping in, the grass surface is not coated with grass treatment agent, binder and coil material mismatch, painting is not uniform, paving the coil did not exclude the air on the bottom surface, some exhaust tank blockage.
    (iii) Prevention and control measures:
    grass-roots must be dried, with a simple test method to test qualified, can be paved

    , grass-roots to be clean, the selection of grass-roots treatment agents, binders to match the material of the coil, after testing qualified to use; When the coil is laid, the air below must be erased and rolled tightly. It is also possible to use a sticky, point-stick, empty paving method to ensure that the exhaust channel is clear.
    a coil waterproof roofing project with a insulation layer, a transverse exhaust tank and an exhaust well with a waterproof layer must be set up, as shown in Figure 1.
    Figure 1 exhaust tank and exhaust well
    2, coil waterproof layer cracks
    (i) phenomenon:
    waterproof layer appears along the prefabribribribrium roof panel end cracks, node cracks, irregular cracks leakage.
    (ii) reason analysis:
    blind use of low elongation of the coil, plate end and node details did not do additional buffer layer and enhancement layer, construction method errors, such as when laying the roll too tight.
    (iii) Prevention and control measures:
    1, the selection of large elongation, durability of more than 15 years of coil;
    2, in the prefabribriuled housing panel end seams set up a buffer layer, see Figure 2 and Figure 3, dry roll strip width of 300mm. It is not advisable to pull too tight when laying coils. Summer construction should be relaxed after the post-paving.
    2 plate seam buffer layer
    1 - sealing material; 2 - dry roll;
    3 - waterproof layer
    Figure 3 plate seam treatment
    1 - upper wind side dot fixed; 2 - dry roll strip;
    3 - PVC glue; 4 - 20 soaked oil straw rope;
    5 - C20 fine stone concrete
    in the waterproof coil has appeared cracks, along the rule of the cracks in the line, cutting machine. If the grass-roots do not leave a gap seam, then to cut the seam, seam width 20mm, seam embedded with flexible sealing paste, the surface along the seam blank paved a 200mm wide coil strip as a buffer layer, and then full of a 350mm wide coil waterproof layer, node fine cracks treatment method is the same.
    Thy, daughter wall root leakage
    (i) phenomenon:
    waterproof layer along the root of the daughter wall yin corner empty drum, cracks, daughter wall masonry cracks, pressure top cracks, gables are pushed out of the wall, rain from the gap in the inner wall.
    (ii) reason analysis:
    looking for flat layer, rigid waterproof layer and other construction directly close to the daughter wall, do not leave a gap seam, long daughter wall masonry did not leave a telescopic seam, under the role of temperature difference, gables and daughter wall cracking;
    (iii) Prevention and control measures:
    construction roof to find flat and rigid waterproof layer, at the junction of the daughter's wall should be left 30mm of split seams, seams embedded with flexible sealing paste; Powder into an arc, daughter wall height is greater than 800mm, to leave grooves, see Figure 4, the end of the coil should be cut into the reserved grooves, nailed with cement mortar or sealing material to fill the grooves firmly. When the height of the daughter wall is less than 800mm, the coil end is laid directly to the top of the daughter's wall, and then the reinforced concrete roof is made. See Figure 5.
    Figure 4 Daughter Wall Roll Water Head
    1 - Groove; 2 - Sealing Material ;
    3 - Additional Layer; 4 - Waterproof Layer
    Figure 5 Daughter Wall Pressure Top and Roll Head
    1 - Pressure Top; 2 - Additional Layer;
    3 - Waterproof Layer;
    Roof to find flat or rigid waterproof layer close to the daughter wall, not left a gap seam, to cut along the daughter wall 20 to 30mm wide groove, sweep clean, slot embedded flexible seal paste, daughter wall has cracks, to use grout material repair, such as gable daughter wall has protruded from the wall, must be removed after re-building, the volume of the opening should be sealed tightly.
    Se four, tiangou, eaves leakage
    (i) phenomenon:
    along the bottom of the ditch or prefabribriited gutter joint, roof and trench junction cracks, trench bottom leakage.
    (ii) Cause analysis:
    tiangou, eaves of the structure deformation, temperature difference deformation caused by cracks, waterproof structure layer does not meet the requirements, the diameter of the water drop cup is too small or blockage caused by overflow, leakage.
    (iii) Prevention and control measures:
    ditch waterproof layer before construction, first check the prefabricated trench connector and roof grass-roots combination of the irrigation is tight and flat, water drop cup to be installed, drainage slope should not be less than 1%, the bottom of the ditch yin angle To be applied to the arc, the angle of the yang corner to be applied to a blunt angle, with the same nature as the film to do waterproof enhancement layer, ditch and roof junction empty spread width of 200mm of coil strip, waterproof coil must be spread to the roof of the outer state of The trench. See Figure 6.
    Figure 6 Eaves trench
    1 - waterproof layer; 2 - additional layer; 3 - sealing material; 4 - dry roll
    days ditch, eaves ditch cracks, to cut the waterproof layer at the crack, the grass-roots cracks Chisel into a "V"-shaped groove, the upper mouth width of 20mm, and sweep clean, and then embedded flexible seal paste, over the seam spread 200mm wide coil strip as a buffer layer, and then full of paste width of 350mm of coil waterproof layer.
    , deformation seam leakage
    (i) phenomenon:
    along the deformation seam root cracks and seam cover leakage.
    (ii) Cause analysis:
    deformation seam fine structure is not proper, the root yin corner did not do arc and waterproof additional layer, the top cover did not do buffer layer, cover after cracking damage caused the waterproof layer leakage.
    (iii) Prevention and control measures:
    check the quality of ash and dryness, sweep clean, as shown in Figure 7, at the root layer, additional coil width of 300mm, the upper end of the coil to stick firmly (the rest is empty), in the facade and top, the roll to be full paste, the top of the wall covered with the same wall Wide coil, paste one side, the seam embedded in the padding material, and then paste the other side, covered with a layer of coil material, the coil is 200mm wider than the outside of the wall, covered after sticking, with freshly poured or prefabriced reinforced concrete cover buckle firmly pressed, prefabribribried cover plate seams with sealing paste embedded.
    figure 7 deformation seam waterproof structure
    1 - padded material; 2 - coil cover; 3 - waterproof layer;
    4 - additional layer; 5 - asphalt wire; 5 - cement mortar;
    7 - Concrete cover
    deformation seam wall root cracks and leakage, to cut the cracks in the coil, the grass-roots expansion of the seam, embedded waterproof seal paste, empty roll strip, and then the original waterproof layer repair, strengthen paste good;
    6, water leak
    (i) phenomenon:
    along the water drop around the leak, some of the water drop surface is higher than the waterproof layer and water accumulation, or because the water drop is small, blocked and overflowing.
    (ii) Reason analysis:
    water drop cup installation height is higher than the grass root, water drop cup and structural layer contact area is not blocked dense, horizontal through the wall water drop between the wall, not with mortar to fill the hole between the solid, did not do waterproof additional layer, waterproof layer did not reach into the water drop cup within a certain distance, resulting in rainwater along the outer side of the water drop and cement mortar seam leakage.
    (iii) Prevention and control measures:
    is pouring the straight water drop cup of tiangou, to be installed on the template before pouring concrete, along the edge of the cup mashed solid. Prefabriced trench, water drop cup installed to support the bottom template of the cup tube week. With a matching ratio of 1:2:2 cement, sand, fine stone concrete pouring solid, along the cup wall and the trench at the combination of 20mm×20mm groove and embedded sealing material, the top surface of the water drop cup should not be higher than the trench to find a flat layer. See Figure 8.
    additional coil paste method: cut a width greater than or equal to 250mm, long for the water drop inside diameter plus 100mm coil roll into a cylinder, into the water drop inside 100mm paste solid, exposing the water drop outside the coil cut into a 30mm wide strip outside Turn, paste on the plane around the water drop, and then cut a diameter than the water drop cup diameter of 200mm larger coil, center according to the water drop cup inside diameter cut into a meter glyph shape, glue paste, the rice note to the inside of the mouth plug, and then lay a large waterproof layer.
    8 Water drop
    1 - sealing material; 2 - waterproof layer; 3 - additional layer;
    4 - looking for flat layer; 5 - sealing material
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