(1) Quality requirements for roofing works

       When the roof works are subject to the acceptance of the divisional project, the quality shall meet the following requirements:
1. There should be no leakage or water accumulation in the waterproof layer.
2. The materials used in the roofing works shall comply with the design requirements and quality standards.
3. The level of the leveling layer should be flat, and there should be no looseness, sanding or peeling.
4. The thickness, water content and apparent density of the insulation layer should meet the design requirements.
5. Structures such as gutters, trenches, flooding and deformation joints shall meet the design requirements.

6. The method of coiling and lap jointing should meet the design requirements, the lap width is correct, the joints are tight, and there should be no wrinkles, bubbling and curling.

7. The thickness of the waterproof layer of the coating film should meet the design requirements, and the coating has no cracks, wrinkles, runny, bubbling and exposed carcass.

8. The surface of the rigid waterproof layer should be smooth, calendered, sand-free, skin-free, and crack-free. The division joints should be straight and in the correct position.

9. The caulking sealing material should be firmly bonded to the base layer on both sides. The sealing part is smooth and straight, and there must be no cracking, bubbling or falling.

10. The base of the tile roof should be flat and firm, the tiles should be arranged neatly and straightly, the lap joints should be reasonable, the joints should be tight, and there should be no defective tiles.

(2) Contents of quality inspection and acceptance of roofing works

1. Inspection and acceptance of preparation work: Before the construction of waterproof project, it should be checked whether the roofing project is reviewed by drawings, whether the content of the construction plan or technical measures is complete, whether the process arrangement is reasonable, whether the progress is scientific, whether the quality requirements are clear, and whether the quality target is Formulate; review the qualification level of the waterproof professional construction team and the employment certificate of the construction personnel; check the entry situation of the roofing materials, whether the material appearance inspection is qualified, whether the on-site sampling inspection conforms to the standard, whether the test data is valid, and whether it meets the design requirements; Check the quantity and integrity of construction equipment and labor protection supplies.

2. Inspection and acceptance of the quality of the base layer: Before the screed layer construction, check whether the quality of the structural base layer meets the requirements of waterproof engineering construction, whether the quality of the screed raw materials is qualified, whether the ratio is accurate, whether the water-cement ratio and consistency are appropriate; Whether the position of the template is accurate, whether the cement mortar is compacted, whether the slope is accurate, whether the secondary calendering is performed in time; the surface quality of the leveling layer is checked.

3. Inspection and acceptance of insulation layer quality: Whether the insulation layer material is correct, whether the quality is qualified, whether the thickness of the plate is accurate; whether the ratio of the overall cast-in-place insulation layer is correct, whether the mixing is uniform, and whether the degree of compaction meets the requirements; Whether the thickness and compaction degree of the layered virtual insulation of the thermal insulation material are the same as the parameters determined by the test; whether the slab insulation material is laid smoothly, whether the gap between the slab joints is embedded with the same material, whether the joints of the upper and lower slabs are staggered; After completion, whether the screed and waterproof layer should be constructed in time. If there is rain before covering, whether temporary measures are taken, the moisture content of the insulation layer should be re-measured after rain.

4. Quality inspection and acceptance of waterproof layer: Before the construction of waterproof layer, check whether the quality of the base layer (leveling layer) is qualified; whether the waterproof layer material and supporting materials are qualified for sampling inspection, whether the weather conditions during the construction of the waterproof layer meet the requirements, and the detailed structure has Whether to add additional reinforcement layer according to requirements; whether there is any elastic thread before the coil is laid, whether the coil construction sequence and construction technology are correct, whether the paving direction is correct, whether the bonding method meets the design requirements, and whether the air on the bottom of the coil is exhausted. Whether the lap width of the coil meets the requirements, whether the seam of the coil is reliable, whether the seal is tight, whether the ratio of the waterproof coating is accurate, whether the stirring is uniform, whether the amount of the brush is appropriate, the uniformity of the brush, and the brushing Whether the total number of passes and the total amount of paint meets the requirements, whether the interval between paintings is sufficient, whether the laying direction and overlap width of the carcass reinforcing material meet the requirements, whether the thickness of the waterproof layer of the coating film meets the design requirements; rigid waterproof layer and structure Is there a separation layer between the base layers, whether the position of the divisional slit template is correct, whether the template is firm, the type and specification of the steel bar Does it meet the design requirements, the spacing and position of the steel bars are correct; whether the proportion of fine stone concrete is accurate, whether the mixing is uniform, whether the concrete of each grid is continuously poured, whether the concrete is compacted and smeared, and whether the secondary calendering is performed in time. Whether the maintenance is timely and sufficient, whether the curing time meets the requirements, whether there are defects such as cracks, shelling, sanding, etc., whether the surface flatness tolerance is in compliance with the requirements.

5. Quality inspection and acceptance of the protective layer: Whether the waterproof layer has been accepted and accepted, whether the protective layer has been taken to protect the waterproof layer; whether the protective coating of the light-colored paint is uniform, whether there is leakage or dew exposure; mung bean sand, Whether the mica or vermiculite is evenly distributed and the bond is firm; whether there is a separation layer between the cement mortar, the block or the fine stone concrete protective layer and the waterproof layer, whether the position of the division joint is accurate, whether the cement mortar or concrete is dense, and the surface Whether there is any defect; whether the drainage slope of the protective layer meets the design requirements.

6. Quality inspection and acceptance of tile roof: Whether the tile and its supporting materials are qualified for sampling inspection, whether the quality of the base layer is qualified, whether the joint parts are enhanced, whether the waterproof layer is inspected and accepted, and the smoothing strips and tiling strips of the flat tile roof Whether it is matched with the material size, whether the nailing is flat and firm; whether the flat tile is firmly laid, whether the fixing measures are taken when the slope is too large, whether the tile surface is neat, flat and straight, between the ridge tile and the flat tile, the ridge tile, Whether the direction and size of the tiling between the flat tiles are correct, whether the ridges and the ridges are straight, whether the number of nails for the linoleum is sufficient, whether the nails are flat, nailed, whether the nail caps are exposed or not, and whether the base layer is tight. Whether the seam between the shingles is staggered; whether the method of fixing and fixing the sheet metal is correct, whether the width of the lap is in compliance with the requirements, whether the joint between the sheets has sealing measures, whether the seal is tight, whether the seal at the bolt fixing point is tight, the mouth line, Whether the flooding section is straight.

7. Acceptance of insulated roof: Whether the waterproof layer before the construction of the insulation layer is qualified, whether there is any measure to protect the waterproof layer; whether the quality of the overhead insulation product meets the requirements, whether the roof is cleaned before the construction of the overhead plate, Whether there is any strengthening measures at the bottom of the buttress, whether the spacing of the buttress is accurate, whether the overhead plate is paved with a slurry, whether the laying is smooth and stable, whether the height difference of the adjacent plate meets the standard, whether the joint is densely packed, and the water storage area Whether the division and structure are correct, whether the position and size of the drainage pipe, overflow pipe, water supply pipe and water hole meet the design requirements; whether the drainage slope of the planting roof is accurate, whether the planting layer and the hydrophobic layer material meet the design requirements and discharge Whether the position, size and elevation of the hole meet the design requirements.

8. Leakage inspection of roof waterproofing layer: Check whether there is leakage or accumulation of water on the roof, and whether the drainage system is unblocked. It should be carried out after rain or after continuous watering for 2 hours. For roofs that may be used for water storage inspection, the water storage time shall not be less than 24 hours. During the inspection, the ceiling of the top floor room shall be carefully examined. If there is leakage, record the state of the leak, find out the cause, and repair it in time until there is no leakage on the roof.