With the continuous development of industry, the development of coiled material waterproofing can be described as a wide variety and a wide variety. In short, the advent and application of various coiled material waterproofing has its own advantages, or it is easy to obtain materials, or the cost is low, or the price is not low. Durable, or different uses in different waterproof occasions. The following small series introduces you to the basic requirements for waterproof construction of coiled materials and tips for purchasing waterproof membranes.

Basic requirements for coiled material waterproof construction

1. Basic level and leveling level

The base layer and the leveling layer should do the work of caulking (prefabricated board), leveling, corner and base layer processing. When the cement mortar is used for leveling, the cement mortar is smoothed and collected for secondary calendering, and fully cured, and there must be no looseness, sand and shelling, otherwise it must be repaired. The connection between the roof base layer and the parapet wall, vertical wall, skylight wall, chimney, deformation joints and other protruding roof structures, and the corners of the base layer (each water drop, cornice, gutter, gutter, roof ridge, etc.) should be made round arc. Before laying the waterproof layer (or gas barrier), the leveling layer must be dry and clean. The choice of base treatment agent (or cold base oil) should be compatible with the coil. The base treatment agent can be applied by spraying or brushing. The spraying should be uniform, and the second spraying should be carried out after the first drying, and the coil should be laid after the last drying.

2. Construction sequence and laying direction

Coil laying should adopt the construction direction of first high, low first, and longest second, that is, high and low span roofs, first lay high spans and then low spans; large area roofs of equal heights are laid first away from the material. This can prevent the paved roof from being trampled and destroyed by people due to material transportation. Before laying the coiled material on a large area, the node sealing treatment should be done first. The additional layer and the roof drainage area (the connection between the roof and the water drop, the cornice, the gutter, etc.) and the empty paving strip of the grid seam, etc. The lowest elevation of the roof is constructed upwards. The division of the construction section should be set at the roof ridge, cornice, gutter, deformation joints, etc. Coil laying direction should be determined according to the roof slope and whether there is vibration around. When the roof slope is less than 3%, the coiled material should be laid parallel to the ridge; when the roof slope is 3% -5%, the coiled material can be laid parallel or perpendicular to the ridge; when the roof slope is greater than 15% or subjected to vibration, the asphalt is waterproof The coiled material should be laid vertically on the ridge. The polymer modified asphalt waterproof membrane and the synthetic polymer waterproofed membrane can be laid parallel or perpendicular to the ridge, but the upper and lower coils are not laid perpendicular to each other.

3. Lap method, width and requirements

Coiling method shall be adopted for the roll material. The joints of two adjacent coils should be staggered by more than 300mm to avoid overlapping of the coils at the joint and improper overlap. Laminated and laminated, the overlapping seam of the upper and lower webs should also be staggered by 1/3 width. When using high polymer modified asphalt waterproof coiled material for point bonding or empty paving, the two ends must be fully bonded at least 500mm. The lap seam parallel to the roof ridge should be lapped along the direction of the water flow; the lap seam perpendicular to the roof ridge should be lapped along the wind direction of the maximum frequency of the year. Each layer of coiled material should be lapped at the connection between the gutter and the roof. The lap joints should be staggered. The joints should be left on the side of the roof or gutter, and not on the bottom of the ditch.

Waterproof coil purchase tips

1. Identify the coil quality from the tire base

Generally, visual inspection is carried out from the cross-section of the product. The specific method can tear the optional product by hand to observe the tire-based fibers exposed on the cross-section. It can be concluded that the product must be a composite tire roll, and what kind of composite tire roll needs to be tested with a physical property test-soluble content content to observe its bare tire base.

2. Product price comparison

The competition of waterproof membrane products is fierce and fakes are rampant. Taking the production of SBS modified asphalt waterproof membrane with the largest market volume as an example, the best profit of the company is no more than 15%. A variety of ultra-low-cost SBS modified asphalt waterproofing membranes appearing on the market have little SBS content, and even do not add SBS, they are replaced with waste rubber powder. Therefore, pay attention when buying, and try to avoid choosing products that are significantly lower than the market price.

3. Strictly control the quality from the physical properties

The visual inspection can only distinguish the composite tire roll material, but it cannot solve whether the selected product meets the quality requirements. This requires the user to go to a technical institution with inspection capabilities to carry out the content of soluble matter according to the corresponding product standard. Examination of physical properties of ex-factory items. The content of solubles is used to control the amount of asphalt and modifiers contained in the product. At the same time, it can also reveal the true appearance of the tire base used in the product.

4. Pay attention to the product name and packaging logo

According to product standards, the product packaging should be marked with the company name, product mark, production date or batch number, production license number, storage and transportation precautions, product labeling should be strictly in accordance with the standard, consistent with the product name, and must not be ambiguous Incomplete words or marks and no production marks.

Editor's summary: The basic requirements for the waterproof construction of the coil and the purchase techniques of the waterproof coil are introduced here, and I hope it will be helpful to everyone. If you want to know more, you can follow the information on this website.

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