I. Preparation before construction
Prior to the construction of the roofing project, it is necessary to review the drawings of the building and the roofing project to understand the detailed structure of the building roof and related technical requirements, and to formulate the waterproofing scheme or technical measures for the roof in connection with the actual situation of the waterproofing project. In this way, the construction of the project will be carried out in a planned manner according to the construction organization so as to prevent the work from being missed, disordered, and reversed from affecting the quality of the project, avoiding leaving defects after construction and causing rework.
Second, the construction unit and procedural requirements
Roof waterproofing must be carried out by professional waterproof teams or proficient waterproof workers. It is forbidden for units that do not have qualification certificates and non-waterproof professional teams or non-waterproof workers to perform waterproof construction of roofing projects. Construction units or supervision companies should carefully inspect the construction of construction personnel. Documents. During the construction, the construction unit shall carry out self-inspection, self-examination, self-correction and construction records according to the construction procedures and levels, and the supervision unit shall do the inspection and acceptance of each step. After the acceptance, the next step and level can be performed. .
Third, the document requirements for waterproof materials
Waterproof materials used in roofing projects shall have material quality certification documents and be certified by the designated quality inspection department to ensure that their quality conforms to the requirements of the Technical Code for Roof Engineering (GB50207-94) or the relevant national standards. After the construction waterproof material enters the construction site, it shall be accompanied by the factory inspection report form and factory qualification certificate, and indicate the production date, batch number, specification and name. The construction unit shall sample and re-examine according to regulations. Sampling and re-examination shall be strictly in accordance with witness sampling and sample delivery system. Under the witness of the construction unit representative or supervision unit personnel, the construction personnel shall sample at the scene and send it to the laboratory for testing. After passing the re-inspection and submitting the qualified report of the re-test test report, it can be applied in the waterproof project. It is forbidden to use unqualified waterproof materials in the project. All unqualified materials shall be withdrawn from the construction site as soon as they are discovered.
Four, roof waterproof construction points
1. Environmental requirements for construction. It should ensure that the base surface is clean, free from dust, oil, rain, snow, frost, fog, or excessive atmospheric humidity, and windy weather should not be used in the open air. Otherwise, appropriate technical measures should be taken.
2, the roof drainage slope requirements. The drainage slope of the flat roof is 2 degrees to 3 degrees. When the slope is less than or equal to 2, the material should be used to find the slope. When the slope is greater than 3 degrees, the structure should be used to find the slope. The longitudinal slope of the gutters and trenches should not be less than 1 degree, and the ditch gap should not exceed 200 mm. The slope should not be less than 5 degrees within a range of 500mm around the water outlet.
Doing the above four waterproof requirements, the basic existing waterproof problems will be easily solved, of course, the most critical have to find a reliable master of construction, it will not appear in the construction part of the negligence, or feel that there are architectural construction experience, You can also think about yourself, so that you can guarantee the final waterproof effect of the building.