Common problems and treatment methods of roof waterproofing engineering

Common problems and treatment methods of roof waterproofing project:
1. House
-sided waterproofing project before construction
set up units should organize drawings review, not unauthorized changes to roof waterproof grade and waterproof materials, really need to change, should be approved by the original construction drawing review body. For daughter walls, high and low spans, upper manholes, deformation seams and out roof pipes, wells (smoke) road and other nodes should be designed impermeable structure details,
outstretched roof well (smoke) road perimeter should be together with the roof structure poured a reinforced concrete waterproof ring.
. Roof waterproofing must be constructed by a professional construction unit with the corresponding qualifications, and the construction contract shall specify the quality standards and
of
.
Professional construction units shall, in accordance with the design requirements, deepen the design of details and structures
, prepare special
construction plans
, make construction models, and report to the construction general contracting, supervision, construction units for examination before construction.
3. After the waterproof material enters the field, the construction, construction and supervision units shall carry out
sym joint acceptance
to verify the conformity of the quality certificate documents with the physical objects, and to inspect the appearance quality of the material, and to carry out witness sampling in accordance with the requirements, and then use it after passing the sampling.
4. Find the drainage slope of the flat layer should meet the requirements. Flat roofing structure should not be less than 3%, the use of materials should not be less than 2%;
roll waterproof roof grass and daughter wall, gables, skylight wall, deformed seams, smoke (well) road and other protruding roof structure junction and grass corner,
looking for flat layers should be made not less than R50 arc
. A slightly lower hole should be made around the
drain
.
5. Inverted insulation roof should be low water absorption rate, and long-term immersion of invarutable insulation materials.
6. Plate insulation materials shall be paved according to the calibration slope line to determine the direction of the paving, and layered, segmented for paving and sewing. When paving,
the upper and lower plate gaps should be staggered from each other, the surface of the two adjacent plate edge thickness is
. After the construction of the insulation layer is completed, the level should be laid in time to reduce moisture and water inlet, especially during the rainy season construction, but also to take timely measures.
7. The exhaust pipe shall be set on the structural layer, cross-sectional, shall not be blocked, shall be
6m
in spacing, and shall be connected with the exhaust port connected to the atmosphere. The pipe wall passing through the insulation layer should be provided with an exhaust hole to ensure the smooth flow of the exhaust pipe, the roof area
to be set up for every 36m2 exhaust port
, the exhaust port should be located at the intersection of the exhaust pipe.
8.
Tiangou, eaves ditch should be added additional layer
, the use of asphalt waterproof coil, should be added a layer of coil, the use of high polymer modified asphalt waterproof coil or synthetic polymer waterproof coil, it is appropriate to use waterproof coating film-reinforced layer. The additional layer at the junction of the tiangou, eaves and roof shall be empty, and the width of the empty bunk shall not be less than 200mm;
9. When the daughter wall adopts the reinforced concrete structure, the
retractable seam spacing should not be greater than 12m
. The top of the daughter's wall and the sable should drain in
slope is not less than 5%
.
Daughter wall for the brick wall when the coil head can be directly laid under the daughter wall of the concrete pressure, such as the daughter wall is higher, can leave grooves in the brick wall, the roll head should be pressed into the groove and fixed with a pressure bar nail, the inlay sealing material closed, groove from the roof layer height should not be less than 250mm.
the daughter wall is concrete, the end of the coil is fixed by galvanized steel or stainless steel bar nails,
nail distance≤900mm
, and sealed tightly with sealing material.
10.
the roof deformation seam should be pre-filled non-combustible insulation material, the upper fill cushion material, and covered with coils.
and other high deformation seam top should be buckled reinforced concrete or metal cover, concrete cover seams apply sealing material sealing material; High and low cross-deformation seams on the high-span wall waterproof coil cover and metal cover, the application of metal pressure nail fixed, and sealed with sealing material.
11. The water drop cup buried height should be correct,
water drop around the 500mm range slope should not be less than 5%
, and should first be sealed with waterproof paint, thickness of 2 mm is appropriate,
waterproof layer and additional layer into the water drop cup should not be less than 50mm.
the water drop cup and the grass-roots contact area should
reserve 20 mm wide 20 mm deep groove
, so that
embedded neutral silicone weather-resistant sealant.
12
. anti-beam water hole
reserved position should be correct, its
pipe diameter should not be less than 75 mm
. The holes in the water hole should be coated with waterproof paint, the two ends of the pre-buried pipe should be left in contact with concrete grooves, and sealed with neutral silicone weather-resistant sealant.
13. The roofing facility base should be directly set on the roof structure, and according to the requirements to do a good job of additional waterproof and water-wide construction treatment.
14. Within 500mm range of the pipe root that extends out of the roof, the mortar should be applied to the flat layer
height not less than 30mm arc
, and the pipe root should be waterproofed around the layer, the width and height should not be less than 300mm. The height of the waterproof layer on the pipe should not be less than
250mm
, the end is tight with metal hoops, and sealed with sealing material.
15. Waterproof protective layer should be set up in a split seam.
Cement mortar
protection layer should not be larger than
1m2
, plate material protection layer segment area should not be greater than
100m2
, fine stone concrete protective layer should not be larger than
36m2
. The width of the split seam should be
20 to 30mm
, depth with the thickness of the protective layer, the seam is embedded with asphalt horseshoe fat and other waterproof sealing materials, the flexibility and toughness of the sealing material should meet the requirements, high temperature should not flow, low temperature should not be brittle.
rigid protective layer and daughter wall, gables should be reserved between the width of 30mm gap
, depth with the thickness of the protective layer, gap embedded waterproof sealing material practice with the same slit practice.
16. Pipes, equipment or pre-buried parts that extend out of the roof shall be installed before the construction of the waterproof layer. After the waterproofing layer of the roof is completed, no holes or heavy objects shall be created on it. Roof solar energy, fire protection and other facilities, equipment, pipe installation, should take effective protective measures to avoid damage to the waterproof layer.
17. After the completion of the roofing project, the
construction unit shall organize the construction and supervision units to conduct water storage tests or water-spraying tests
to check whether the roof drainage is smooth, whether there is water build-up and leakage, and to keep the archives of photographs and video materials.
should be
water storage test on the flat roof, water storage time is not less than 24 hours, the shallowest water storage is not less than 20mm
, the deepest should be lower than the water level of the waterproof layer.
to the slope roof, should be after rain or continuous water 2h
, observation and inspection of leakage phenomenon, and should be well recorded. Water should also be stored on flat roofs during pre-completion inspections (except for winter construction).