What is the roof waterproofing construction plan?

The roof is the outer envelope component of the uppermost layer of the building, which is used to resist the influence of unfavorable factors such as rain, snow, wind, frost, solar radiation, and temperature changes in nature, and ensure that there is a good use environment inside the building.

Roofing method: cast-in-situ roofing panel - 15 thick 1:3 cement mortar screed layer - cold bottom oil a three-felt four-oil waterproof layer - mung bean sand protective layer; Before the construction of the roof waterproofing project, the base should be inspected and cleaned up, and the weak links should be strengthened first, and the construction of the above waterproof layer can only be carried out after passing the inspection; In the construction of the roof waterproofing membrane layer, it is necessary to ensure that the base layer is dry, otherwise it will affect the waterproof effect and the degree of dryness.

Inspection method: It is to lay 1m2 coil flat on the screeding layer, let it stand for 3-4 hours and then open it for inspection, and the screed can be laid without water traces on the covered part of the screed layer and the coil. Here we mainly elaborate on the construction of waterproofing membranes.

Before the construction of the waterproofing membrane, it should first be equipped with asphalt, which should be prepared according to the workload of the day and strictly measured by scales.

Key points of the construction of waterproof membrane paving: The construction of the waterproof layer of the membrane should be carried out after the completion of masonry, installation equipment, pipelines, etc. When paving the high and low span houses, they should be carried out in the order of high and low first, far first and then near; In a single-span paving, the drainage should be paved more concentrated parts (such as downspouts, cornices, inclined ditches, gutters, etc.), according to the elevation from low to high, the slope and the façade of the membrane should be paved from the bottom to the upward, so that the membrane is lapped in the direction of water flow; When the coil is paved with parallel ridges, the long side lap is not less than 70mm, the short side is not less than 150mm, and the lap joints of the short side of the adjacent two coils should be staggered not less than 500mm. On the slope of arched roofs and skylights with a slope of more than 25%, short-side laps should be avoided as much as possible; Before the coil is paved, the screed should be dry, and the general field test method:

From the evening to the next morning or within about 1-2h on a sunny day, cover 1 coil of material, if there is no condensation on the inside of the coil, it is considered that the screed layer has been basically dry.

The roof should follow the principle of "reasonable fortification, combination of discharge and discharge, adaptation to local conditions, and comprehensive treatment", and do a good job of waterproofing and drainage to maintain the normal indoor environment and avoid erosion from rain and snow. The roof waterproof grade and fortification requirements should meet the following requirements: level, particularly important or have special requirements for waterproof requirements of the building, the reasonable service life of the waterproof layer is 25 years, the waterproof layer should be selected as a material synthetic polymer waterproofing membrane, polymer modified asphalt waterproofing membrane, metal plate, synthetic polymer waterproof coating, fine stone concrete and other materials, fortification requirements three or more waterproof fortification; Important buildings and high-rise buildings, waterproof reasonable service life of 15 years, waterproof layer selection materials should be selected polymer modified asphalt waterproofing membrane, synthetic polymer waterproof membrane, metal plate, synthetic polymer waterproof coating, polymer modified asphalt waterproof coating, fine stone concrete, flat tile, linoleum tile and other materials, fortification requirements two waterproof fortification; For general buildings, the reasonable service life of the waterproof layer is 10 years, and the materials selected for the waterproof layer should be three felt and four oil asphalt waterproofing membranes, polymer modified asphalt waterproofing membranes, synthetic polymer waterproofing membranes, metal plates, polymer modified asphalt waterproof coatings, synthetic polymer waterproof coatings, fine stone concrete, flat tiles, linoleum tiles and other materials; Non-permanent buildings, the reasonable service life of the waterproof layer is 5 years, and the materials used for the waterproof layer can be used as two felt and three oil asphalt waterproofing membranes, polymer modified asphalt waterproof coatings and other materials, and the fortification requires a waterproof fortification.

Construction in strict accordance with the roof plan; Elevation lines pop up around the parapet wall for gutter slope and nest downspouts; The slope of the gutter must be pulled first, and the slope should be guaranteed to be 1%, and the elevation of the downfall should be higher than the elevation of the surrounding gutter 2 3 The coil should be lapped in the direction of the water, and there should be no warping edge; The construction of the downspout must be constructed according to the design details, and each layer of membrane should be pasted into the downspout cup and sealed with asphalt glue; No additional layers should be omitted. And do a water holding test to ensure that there is no leakage; The type of work, the number of people, the content of the work, the technical personnel, the preparation of the plan, the formulation of measures, the sorting of data, the technical disclosure, the quality and safety personnel, the quality and safety supervision, the project acceptance, the surveyor, the pay-off, the procurement personnel, the material timely notification inspection, the main construction personnel, the removal of impurities and dust, the coating of adhesives, the paving of reinforced polyester cloth, surface treatment, mechanical equipment, maintenance of all mechanical gadgets and other sporadic projects have certain specifications.

Detailed plan: Determine the treatment and maintenance planAfter the above investigation and analysis, a detailed plan for roof leakage treatment is formulated, including the construction plan and maintenance plan. According to the grade of the building, the materials and construction technology suitable for the original waterproof layer should be selected according to the grade of the building, and the following points should be noted

It is necessary to facilitate construction and ensure quality.

2.It is necessary to adopt a construction method with simple technology and easy operation to minimize equipment and tools.

3.The selected repair and treatment materials should be compatible with the original waterproof layer materials, not only to make the two firmly bonded, but also not to corrode.

4.Under the condition that the roof base layer is more complex, it is necessary to try to use materials with strong arbitrariness (such as coatings, amorphous sealing materials, etc.).

5.It is necessary to pay attention to the selection of roof slope and the treatment of the waterproof layer.

Key points of early control:

Conscientiously implement the design disclosure and drawing review.

It is necessary to let the construction party and the technical personnel of the supervision party fully understand the construction characteristics, design intent and process and material quality requirements of the waterproof project. Find out the relevant issues related to waterproofing in the design, such as the performance and practice of waterproof materials, waterproof structure and its measures to ensure quality, the location of post-pouring belts, settlement joints and other structures, and the omission and unclear content of the design drawings.

It is clarified through the design disclosure and drawing review, so as to facilitate the construction and ensure the construction quality. Since most of the design disclosure and drawing review are carried out before the start of the project, and the roof waterproofing project is carried out after the completion of the structural engineering, there may be changes in the roof structure, so the secondary roof waterproofing professional drawing review can be organized if necessary.

Strictly review the construction organization design (plan):

The construction organization plan (plan) is a technical document to guide the construction, and the review focuses on whether the quality objectives are the best; whether the quality assurance system meets the requirements; whether the selection of waterproofing materials meets the design and technical standards; Whether the material quality inspection and retest meet the specified requirements; Whether the transportation and storage of materials comply with regulations; Whether the waterproof base treatment and acceptance standards, construction technology, processes and measures are reliable, the practice of waterproof nodes, whether the construction workers charge the cross street connection and the protection measures of the finished product are feasible, and whether the plan and arrangement are appropriate.

Strictly review the qualifications of the construction unit or subcontractor.

With the promotion and application of new technologies, new processes and new materials, new roofing waterproofing materials are constantly updated.

In addition to the completion of roof waterproofing projects through engineering contracting enterprises, the implementation of professional subcontracting is more common, but it is achieved through front-line construction operators. Therefore, in the qualification review, it is necessary to strictly review the construction experience, technical level, construction organization and management ability and social reputation, professional quality and ability in construction technology, new technology and new process construction.