Waterproof membrane on the roof construction quality control points

[Abstract] article for the purpose waterproof membrane roof construction how to control the quality of analysis, from the preparation stage, the stage of the process are described, and proposed quality control points.

[Keywords] roofing projects, waterproof membrane, Quality Control

In recent years, many of the roofing industry engineering problems become the focus of attention, how to ensure the quality of roofing works, the owners satisfaction assessment is an important indicator of its quality is directly related to the life of the building roof , will also affect people's normal life and production activities carried out on the market today to promote a number of new roofing materials, waterproof membrane, but the traditional use of still account for a large proportion of this paper how the roof waterproof membrane construction quality control points the analysis.

A preparation phase of construction control
1.1 Technical preparation
1.1.1 review of drawings control points
Roof construction, should organize the owners, supervision and construction management joint trial roof unit technical engineering drawings, master drawings in the detailed structure and the technical requirements, understand the contents of the design of roofing, including water level and maximum security audit and other water-related requirements, whether the roof construction and acceptance of norms and quality standards in conflict. Appear in the design omission, error or not clear the contents to be made in writing to the Institute and request a written response.

1.1.2 construction program control points
Construction unit should prepare a sound roof waterproof membrane construction program, including different parts of the waterproof construction methods, technology and quality standards, quality assurance measures for the key and key parts of the waterproof construction should be feasible technical measures and quality assurance measures, anti-leakage measures quality problems and contingency plans, etc. owners, comments to the Commissioner in writing the review and timely feedback to the construction unit, construction unit to modify and adjust the required special waterproof membrane roof construction program, and require modification and re-construction unit reporting program.

1.2 staff to prepare
Staff prepared mainly in construction quality control team, roof waterproof project must be held by a professional team and work license waterproof waterproof construction workers, not by the contracting unit without qualification, is strictly prohibited without appointment cards waterproof roofing project workers waterproof construction. In determining the previous owner of the construction team, supervision, teams of sub-units of the total package for serious study, critical review, major review of its qualifications, performance, key operating personnel of the job card holder case.

1.3 Site Preparation
1.3.1 Quality control of materials
Waterproof material before entering, supervision and construction unit staff to carefully review the materials used in roofing materials, waterproof quality of documents: the factory certification and factory inspection report, and record production date, batch number, size, name, to ensure meet the requirements of various technical indicators, products must have the relevant state departments to use the certificate, the certification information is complete. waterproofing materials after admission, the construction units to send samples strictly according to witness the sampling system for sampling re-examination, members of the supervisory unit under the witness testimony from sampling on site construction unit sampling, common to have a nationally recognized qualification appropriate laboratory testing. The re-examination of qualified, to submit re-examination report in the works before use is strictly prohibited in the use of substandard construction waterproof materials, substandard materials All exit immediately upon discovery.

1.3.2 Waterproof Construction process control
Construction require the construction unit according to the construction process, the three levels of quality inspection system, do the construction supervision unit to record inspection, supervision units in accordance with design drawings and construction specifications to do the work every step of the acceptance process, acceptance before the next procedures, levels of operation.

Waterproof membrane construction flow chart
Primary treatment → leveling layer of mortar coating interface treatment agent → → → node enhancement test shop off location → → → Stones roll sealed shut processing node → → → check → clean protective layer construction
2 quality control during construction
2.1 Construction of environmental requirements
To ensure the construction quality of operation and Stones roll, polymer modified asphalt and waterproofing construction should not be in the negative temperature, cold bonding method is not less than 5 ℃, hot-melt and the hot air welding Stones roll material can be more than the temperature at -10 ℃ under construction, this coil low temperature, the negative temperature can not easily be damaged by frost. rain, snow, frost, fog, or atmospheric humidity, and windy weather should not be open-air operations, otherwise, it should take appropriate technical measures.

2.2 the requirements of the roof screed
Paving screed is the primary waterproofing membrane should be solid, without prominent sharp corners and the surface of the sand pit or the skin from the phenomenon, when the ruler with 2-meter-long inspection, the ruler and the surface of the screed gap not more than 5mm, the gap only moderate changes, and each meter shall not be more than one length. screed the surface composition of the adjacent corner, and making a circular or obtuse angle. screed drainage slope should be consistent with design requirements. flat house find a slope using a structured surface of not less than 3%, the use of materials should be looking for a 2% slope, gutter, gutters vertically to find slope of not less than 1% of the ditch water drop must not exceed 200mm. Links to free download Center http://www.hi138.com
2.3 the requirements of primary treatment agent
In order to strengthen the waterproofing membrane and the cohesive force between the grassroots, ensure the integrity of the waterproof layer of pre-construction, pre-brushing at the grassroots level on the primary treatment agent. Commonly used primary treatment agent with cold base oil and with a variety of polymer polymer modified bitumen membranes and synthetic rubber membrane supporting the bottom (primary treatment agent, selection of materials compatible with the membrane, so as not to be corrosive or incompatible adhesive sheet from the bad.

Cold base oil, primary treatment agent sprayed, painted front to ensure that the leveling layer dry, cleaned, and then use the brush on the roof of the node, peripheral, and other parts of the first corner handle, and then to large-scale spray, brush. Spray, brush to thin and uniform, can not leak from the skin white or too thick. Cold Stones base oil in 1 to 2 days before brushing, brushing the grass-roots dry treatment agent can Stones roll.

Stones roll requirements of 2.4
2.4.1 Laying the direction of membrane
Stones roll direction is mainly prescribed for the bitumen waterproofing membrane (taking into account the low softening point asphalt, waterproof layer of thick, roof slope and roof to be perpendicular to the direction of paving, to avoid flowing. Polymer modified bitumen waterproofing membrane and synthetic polymer waterproofing membrane temperature is good, thinner, there is no flow problems, it is not the direction of paving restrictions, combined with the roof slope and roof to determine whether there is vibration. 2.4.2 Paving The order sheet
Construction of waterproof layer, the first node to do, additional drainage layer and roof parts are concentrated (such as the roof and fall-mouth connection, cornices, gutter, gutters, roof corner, side seam panels and other processing, then the minimum roof elevation at up construction. tiling gutter, gutters coil, it is desirable Shun groove, eaves direction, to reduce overlap.

Paving the level of multi-span and across the roof, according to the first low-high, far after the close of the first order.

2.4.3 Methods and width of the coil overlap
Stones roll bonding method used, and the adjacent two upper and lower membrane lap joints should be staggered. Parallel to the ridge lap joint lap to flow direction, perpendicular to the roof of the lap joint to smooth the local dominant wind direction overlap. laminated layers of sheet laid in the gutter and the roof of the connection to the use of cross-connection lap, lap joint to be staggered joints to stay in the side of the roof or gutter, do not stay in the ditch.

Slope exceeds 25% of the arched roof and skylight under the slope, the short side to avoid overlap, to the short side lap, in lap down to take measures to prevent the coil.

2.5 waterproofing membrane approach requires detailed
Intersection of the pan of water and roof made of grass-roots obtuse (> 135 ° or the arc (R = 50 ~ 100mm), waterproof layer on the roll to the vertical height of not less than 250mm, often 300mm, coil to be tight shut, Coil overlap parts of the hot melt to overflow for the degree of modified bitumen, and then scraping seal interface to prevent water seepage shut Department.

2.6 pairs of roof waterproofing membrane protection requirements
Paving is complete waterproofing membrane must be well protected, so as not to affect the water effects in the water level, capped with 300mm × 300mm perlite insulation blocks, and then an additional layer in the top 3cm thick cement mortar protective layer, which within the steel mesh cloth, cell size should not be larger than 100 square meters, the protection layer based sub-lattice seam, cell slit width of not less than 20mm, the seam filled with a sealing material, to better protect the waterproof layer.

2.7 focus of parts of the construction quality control node
Water content of water before the construction of concrete roof not too large (1m2 coil is flat on the leveling layer dry shop, put it aside for 3 ~ 4h opened after inspection, with screed covering parts of the watermark can be seen laying on the membrane, surface to be cleaned to remove surface dust and scum, after acceptance by the supervisors before entering the next process of construction. screed the surface to be compacted, flat, grass-roots and highlight the roof structure of the junction, and corner of the grass roots are to make arc-shaped, split seam to reserve screed, and filling them with flexible waterproof material. primary treatment agent to spray evenly, according to Roll Stones' first low-high, after the first distant past, "the principle, to do more concentrated parts of the nodes and drainage water treatment, strictly control the detailed structure waterproof practice: gable parapet, flashing parts, fell into the water, gutters, roof gutter, pipe through the roof, the roof Deformation is caused by seepage, etc. leakage from the main body, demanding the construction unit according to design drawings and construction standards, strict supervision of the construction unit of the additional layer of waterproof membrane construction.

3 Summary
In summary, we require the construction unit during construction in strict accordance with roofing waterproof membrane construction process, in strict accordance with quality standards of construction, good roof waterproofing membrane is not difficult. The owners, supervision and construction management units During the construction process to a serious and responsible, maintain a high sense of responsibility, adhere to the rigorous scientific attitude, strict, serious work to do each step, we can significantly reduce the problems caused by construction of the roofing. Links to free download http://www.hi138.com