Roofing is the upper part of the building's external components, the main role is to resist bad weather, protect the building is strong and durable. Roof waterproof construction is very important for the roof, let's take a look at what the roof waterproofing practices are.
1. The waterproofing layer construction of coiled materials shall be carried out after masonry, installation equipment and pipelines are completed;
2. When laying houses with high and low spans, it should be carried out in the order of first high, low, first, and longest;
3. In a single-span paving, the site where the drainage is concentrated should be paved first, and the height of the elevation and elevation should be from bottom to top. Directional overlap.
4. In the parallel roofing of coiled material, the long edge overlap is not less than 70mm, the short side is not less than 150mm, and the adjacent two short-edge lap joints should be staggered by not less than 500mm, in order to ensure the width and paving of the web. Stick straight and mark the line when laying the roll.
5, the arched roof with a slope of more than 25% and the slope below the sunroof should avoid short-edge laps;
6. Before the membrane is laid, the screed should be dry. From the evening to the next morning or in the sunny days, it should be covered within 1 to 2 hours.
Second, the film roof waterproof practices and precautions1. Check whether the quality of the screed conforms to regulations and design requirements, and clean up and clean;
2. Prepare the leveling layer treatment agent and coat the leveling layer. First apply the coating on the roof node, the periphery, and the corner, and then apply it in a large area.
3, the preparation of waterproof coating should be evenly stirred, special parts of the additional enhanced treatment;
4, then apply waterproof coating, coating waterproof coating should be painted facade, node, after coating plane. Coating coating according to the requirements determined by the test;
5, the final is to receive the first processing, and then coating the protective layer, inspection, cleaning, acceptance work.
Third, rigid waterproof roof practices and precautions1. After the prefabricated slabs are filled with fine-grained concrete, the surface of the slabs shall be cleaned and moistened, but no water shall accumulate. After the clay mortar is evenly spread, lime mortar shall be used to separate the layers;
2. Next, the cement mortar leveling layer is used to lay the material for the isolation layer, and the structural layer is leveled with 1:3 cement mortar, and a layer of plastic film is directly laid on the leveling layer after compaction and maintenance.
3, the construction of steel mesh reinforcement to be straightened steel bar, there must be no bending, rust, grease, to ensure that the positioning of steel mesh is accurate;
4. Finally, the fine stone concrete waterproofing layer is applied, and the small block fine stone concrete waterproof layer construction small block fine stone concrete waterproof layer is mixed with concrete in the concrete to reduce the shrinkage of the concrete and avoid cracks.
What are the roof waterproof material, CH-108ZYY polymer cement waterproof coatingCH-108ZYY polymer cement (also called elastic cement) is a two-component waterproof coating material based on acrylate synthetic polymer emulsion, adding special cement, inorganic curing agent and various additives. It has Good film forming, impermeability, adhesion (strong bonding with concrete, brick, stone, tile, ZYY plastic, color steel sheet roof, airport roof, wood, glass, etc.), water resistance, and Weatherability, in particular, can be cured and filmed on a wet base. ZYY composite waterproof coating is divided into two types of ZYY-1 type ZYY-2, wherein ZYY-1 type is mainly used for waterproofing of large deformation architectural parts, such as roof, wall surface, bridge surface and other parts.
ZYY-2 is mainly used for construction waterproofing projects under long-term flooding conditions, such as waterproofing of basements, toilets and baths, swimming pools, reservoirs, subways, tunnels, garbage disposal facilities and other projects.
1, product features
(1) It can also be applied in a very humid environment to cure and form a film;
(2) The characteristics of molecular sieve structure with air permeability and water impermeability after film formation;
(3) After the construction of the waterproof coating film surface directly to do a protective layer of cement mortar or tile decoration layer, the interface is firmly bonded to the drum.
Second, HG203 waterproof seal coatingHG203 waterproof sealing coating introduces the most advanced high-tech technology in the United States and is made from imported raw materials. It is a truly environmentally friendly one-component water-curing polyurethane waterproof seal coating. The new waterproof sealing coating has passed the appraisal of the scientific and technological achievements of the Guangdong Provincial Construction Committee and won the Guangdong Provincial Key New Product Certification. main feature
1, when used, add 20% water as a curing agent, is a reaction curing product; suitable for wet base.
2, 100% environmental protection products, non-toxic and odorless after curing, no pollution, suitable for drinking water projects.
3, solid content can be as high as 100%, less material per unit area; a construction can achieve the required thickness.
4, the film tensile strength, good extension performance, high bonding humidity, heat, cold (-40 °C - 95 °C), chemical resistance, anti-aging, anti-mold performance, and flame retardant.
5, the basic color of the film is white, you can brush the surface of the paint a variety of colors, can also be made according to user requirements of various colors to achieve waterproof decorative effect.
6. Anti-leakage sealant can be made by adding rubber powder, add sand to make non-slip layer, and light hollow filler can also be added to make thermal insulation coating.
7, easy to use and maintenance, effort, time, cost, and security.
Third, YYA special waterproof anti-seepage slurryIt is a new impermeability waterproof material, which is composed of dozens of pure gray powders composed of inorganic components. It is non-toxic, odorless, flame retardant and environmentally friendly. It can be used in food and drinking water projects. After the addition of water, a series of redox reactions take place. After hardening, it has high strength (7 days and more than C35), water impermeability, high temperature resistance (400°C), UV resistance, frost resistance (-50°C), anti-aging, no shrinkage, oil resistance With strong adhesion, it can carry water on the back surface. The thickness can be arbitrarily adjusted (0.5--200mm) according to need. It has excellent backwater surface waterproof, impermeability and moisture resistance, and it has secondary repair function, especially good at governance. Difficulties in the leakage of concrete masonry structures have been tested by the China National Building Materials Testing Center. They have been listed as one of China's major construction and application products for waterproofing and one of the top ten brands of waterproof materials. It is the best choice for durability.
1. Environmental requirements for construction
In order to ensure the construction operation and the quality of the coils, 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 applied to 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, appropriate 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.