Stayed in a warm and clean room, but unfortunately sometimes the roof of the building will leak, which brings us a lot of trouble. Therefore, roof waterproofing is very important. Rooftop waterproofing is a very important project in building construction. Because the quality of the project is directly related to the service life of the building, it will also affect people's normal life. The progress. Therefore, the waterproof roof must be comprehensive, there can be no omissions, once the leakage repair is a troublesome thing, the following Xiaobian gave everyone talk about how to do roof waterproof , take a look at it. First, the base surface requirements The base surface is clean, the moisture content is not more than 9%, and it is flat and compact. The nodes are neat and complete and meet the requirements. Second, the construction process Acceptance leveling layer - cleaning up the base layer - preparing cement binders - doing additional layers - base layer construction - protective layer - curing. Prior to laying and bonding of the coiled material, the waterproofing material for the roof shall be pre-rolled out and found out, and then the ends of the waterproofing material shall be rolled up at both ends, and the prepared cement adhesive shall be poured onto the base layer and evenly coated with a scraper. Scratch, push the roofing waterproof membrane forward, and promptly use the scraper to remove the air left inside the roofing membrane and scrape off excess adhesive. The adhesion rate of roofing waterproofing membrane and screeding layer is 85%. Third, coiled seams practices The vapour barrier, waterproof layer and additional layers are all lap joints, cemented with cement adhesive and have a width of 10cm. Additional layer seams and waterproof layer seams stagger more than 5cm. Roofing waterproofing membrane overlap width of the long side of 8-10cm, short side of 10-15cm, adjacent short side seams should be staggered more than 100cm, the wall and the ground angle are more than 30cm. Fourth, waterproof protective layer After the coil is finished, it is necessary to make a protective layer with a thickness of 2cm for 1:2.5 cement mortar on the waterproof layer, which is divided into two layers. The second layer must be staggered by more than 20cm. The protective layer must be leveled and sprinkled with water. The above is to tell everyone the three steps of waterproofing the roof, hoping to help everyone. Roof waterproof precautions I. Technical preparation before construction Before the construction of the roofing project, the construction unit shall organize the technical management personnel to review the roofing engineering drawings, master the details of the construction drawings and relevant technical requirements, and compile the construction plan or technical measures of the roofing works according to the actual conditions of the project. This avoids leaving defects after construction and causes rework. At the same time, the project is organized according to the construction plan in a planned manner to prevent work omissions, confusion, and inversion from affecting project quality; Second, the requirements of construction personnel and construction procedures Waterproofing of roofing projects must be carried out by waterproof professional teams or waterproof workers. It is forbidden for units that do not have qualification certificates and non-waterproof professional teams or non-waterproof workers to carry out waterproof construction of roofing projects. Construction companies or supervision companies should carefully check the construction personnel's posts. certificate. 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. The supervision unit shall do the inspection and acceptance of each step. After the acceptance, the next step and level of work can be performed. ; Third, the waterproof material quality requirements Waterproof materials used for roofing projects shall have material quality certification documents, and shall 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 waterproof material enters the construction site, it shall be accompanied by a 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 report, it can be applied in the waterproof project. It is forbidden to use unqualified waterproof material in the project. All unqualified materials shall be withdrawn from the construction site immediately upon discovery; Four, roof waterproof construction points 1. Environmental requirements for construction In order to guarantee the construction operation and the quality of the coil shop, it is advisable to construct under the temperature of +50C～+350C; the polymer modified asphalt and the polymer waterproof membrane should not be constructed under the negative temperature, and the hot-melt method can be used to lay the membrane. In the construction of temperatures above -100C, this coil is resistant to low temperatures and is not susceptible to freezing at negative temperatures. Rain, snow, frost, fog, or excessive atmospheric humidity, and windy weather are not suitable for open-air operations, otherwise corresponding technical measures should be taken; 2, the roof drainage slope requirements The drainage slope of the flat roof is from 2% to 3%. When the slope is less than or equal to 2%, the material should be used to find the slope; when the slope is more than 3%, the structure should be used to find the slope. The longitudinal slope of the gutters and trenches should not be less than 1%, and the ditch gap should not exceed 200mm. The slope should not be less than 5% within a range of 500mm diameter around the water outlet. Editor's summary: The above is related to how to do roof waterproofing and precautions on roof waterproof. It is for reference only and hopes to help everyone. 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