A, roof expansion joint waterproof practice
1. 1. Pre-reserved notch treatment: This step is exactly the same as the treatment method for the deformation joint of the front corner roof. Both sides of the notch should ensure the smoothness of the base surface, and the garbage appearing in the gap should be cleaned up in time.
2. Install aluminum alloy base and water stop: This step is still the same as the corner deformation joint. Mark the base and base surface, drill holes, install expansion pipes, install expansion screws, and sleeve the rib of water seal into the groove of aluminum alloy base.
3. Stick the water stop on the roof expansion joint: handle the position, angle and sag of the water stop. Apply primer on both sides of the base surface and water stop, flatten and compact after being dry and non-sticky, and then connect the two water stops with lap glue. The joint length is about 8cm. Brush the primer at the seam of water stop, and then stick, flatten and compact when it is dry but not sticky. Roof expansion joint water stop must be well drained.
4. Install the slide bar and the cover plate: fix the slide bar at the position where it needs to be installed, screw on the slide bar screw, align the two sides of the joint of the cover plate, bond the joint of the cover plate with stainless steel seals, and smooth both sides with glue.
Second, what are the precautions for roof expansion joint construction?
1. Generally, asphalt-impregnated hemp or wood boards, foam plastic strips and ointment elastic waterproof materials are used for caulking of the outer wall. When the gap is wide, aluminum skin and galvanized iron sheet can be used to fill the gap. The inner wall can be covered with metal skin or wood strips. Brick wall expansion joints are generally made into flat joints or staggered joints, and a half-thick outer wall should be made into staggered joints or tongue-and-groove joints.
2. When the roof expansion joint is not constructed, a low wall is generally built at the expansion joint. The waterproofing and waterproofing of the roof are basically the same as the conventional practice, except that the iron concrete slab or tile at the joint should be allowed to expand and contract freely without causing leakage, while the main roof should be filled with caulking ointment and pay attention to waterproofing treatment.
3. At the joint, seal the joint with compressible and deformable ointment, asphalt yarn, metal or plastic adjusting piece, and spread a movable cover plate or rubber to prevent dust from falling. The cover joint at the ceiling can only be fixed at one end to ensure that the components at both ends of the joint can freely expand and contract. The position and size of expansion joint in floor expansion joint should be consistent with the deformation joint of wall and roof.
The waterproof practice of roof expansion joints is as above, and the specific waterproof work needs to be further completed in combination with actual needs to ensure the final waterproof effect. What are the precautions for roof expansion joint construction? Professional decoration masters can properly handle the construction of roof expansion joints and ensure the final construction quality.