Nodal treatment of roof waterproof construction for large-span buildings

 

1, Deformation joints: large-span building roof due to temperature changes, structural deformation and other factors will produce deformation joints. The waterproof construction at the deformation joints should be able to adapt to the deformation of the roof. General use of flexible waterproof construction, such as in the deformation joints filled with polystyrene foam and other thermal insulation materials, and then paste the waterproofing roll-roofing material on both sides, the coil should be used in the empty pavement method or point bonding method, leaving enough space for expansion and contraction, and then in the coil surface to install a metal or plastic cover, to play a protective and decorative role.

2, Light windows and roof junction processing: in some large-span building roof will be set on the light windows, this part is the key node of waterproofing. First of all, we must ensure that the light window and roof structure is firmly connected, and then at the junction of the sealant sealing, sealant should be continuous, full. At the same time, you can lay waterproofing roll-roofing additional layer around the light window, additional layer should be turned upward to a certain height, covering the light window's frame, to prevent rainwater leakage from the interface.

3, Roof entrances and exits: roof entrances and exits of waterproofing to consider the frequency of people in and out of the damage that may be brought. In the entrance and exit around the installation of water barrier, the height is generally 150 - 200mm, using concrete or metal materials. In the water barrier and roof junction and the top of the entrance, to do a good job of waterproofing membrane paving and sealing treatment, such as the use of coil up and bonded with the wall in a solid manner, to ensure that rainwater will not enter the roof from the entrance.