What are the requirements for the paving of special parts of the roofing membrane waterproofing?

Cornice: The coil that is paved to the end of the cornice is cut and pressed into the groove, and then the groove is filled with sealing material. When fixed with a bead, the nail should be embedded in the groove, and the nail cap and the end of the coil should be sealed with sealing material.

Water drop: Before the coil is paved, the water drop should be sealed. When the water drop cup is buried, the connection between the water drop cup and the standpipe socket is embedded and densed with sealing material to prevent the part from pouring water during heavy rain, and the diameter around the water drop is 500mm and sealed with sealing material as an additional layer, with a thickness of not less than 2mm.

A groove of 20 mm wide and 20 mm deep is left at the contact between the water drop cup and the foundation, and the sealing material is embedded.

Each layer of coil and additional layer of the water drop should be pasted on the cup mouth, pressed with the chassis of the rain cover, the chassis and the coil should be coated with cementing material to be pasted, and the chassis should be filled with sealing material around the chassis. The cutting method of the coil at the water drop is shown in the figure below.

Flashing and coil finishing.

Because the flashing is located in the corner of the roof and the vertical wall, the structure is deformed and easy to be exposed to the sun, so in order to enhance the durability of the waterproof layer of the joint part, the membrane should be added to the part. Before the membrane paving of the flooding part, the trial paving should be carried out first, the length of the façade membrane should be left sufficient, the flat membrane should be paved to the corner first, and then the façade membrane should be paved from the bottom to the top. If the façade membrane is paved first, due to the self-weight of the membrane, the façade membrane is stretched too tightly, and the phenomenon of warping, hollowing, and falling off is easy to occur during use.

Specific requirements of membrane waterproofing construction specifications:

1. Ensure that the flatness, slope and surface dust, sand and debris of the construction surface are cleaned;

2. Detailed treatment: requirements for the retention of exhaust pipes, lattice joints, and water pipes out of the roof;

3. Strengthen the waterproof layer of the detailed nodes; On the same elevation working surface, the principle of "difficult first and then easy" should be followed, and when laying large-area waterproof membranes, it should be laid in the direction of the water first, then the high place, and finally the façade and other prominent parts of the laying.

The sequence and direction of the membrane waterproof layer should comply with the following provisions:

1. During the construction of the membrane waterproof layer, the detailed structure should be processed first, and then the lowest elevation of the roof should be paved upward; During the construction of eaves and gutter membranes, it is advisable to pave in the direction of the eaves and gutters, and the lap joints should be in the direction of flowing water;

2. The membrane should be paved with parallel ridges; The upper and lower layers of membranes shall not be perpendicular to each other, and when the façade or large slope is paved with membranes, the full adhesive method should be adopted, and the short side lap of the membrane should be reduced.

3. The lap joints of parallel ridges should follow the direction of flowing water.

1.When the roof slope is less than 3%, the waterproofing membrane should be paved parallel to the roof ridge;

2.When the roof slope is 3%-15%, the waterproofing membrane can be paved with parallel or perpendicular ridges;

3.For roofs with a roof slope greater than 15% or subject to vibration, the waterproofing membrane should be paved vertically with the ridge; The upper and lower layers of coils should not be perpendicular to each other.

If you want the roof waterproofing, it is recommended to use Keshun waterproofing. Founded in 1996, after more than 20 years of steady operation and efficient development, Keshun Waterproof Technology Co., Ltd. has grown into a comprehensive building materials company with comprehensive waterproof solutions as its main business, integrating engineering building materials, civil building materials and building repair business sectors, and its business scope covers domestic and foreign countries. And the production strength is strong, in Guangdong Gaoming, Jiangsu Kunshan, Jiangsu Nantong, Liaoning Anshan, Shandong Dezhou, Chongqing Changshou, Shaanxi Weinan, Hubei Jingmen, Fujian Sanming a total of 9 production and R & D bases, production capacity of asphalt coil 100 million, polymer materials 36 million 680,000 tons of waterproof coatings (including 110,000 tons of non-curing, 170,000 tons of polyurethane, 400,000 tons of water-based dry powder).

At present, Dezhou, Jingmen, and Gaoming are planning to build respectively.

The second and third phases of the plant will expand the production capacity of each base.

The paving direction of the membrane should be determined according to the slope of the roof and whether the roof is subject to vibration: when the slope of the roof is less than 3%, the asphalt waterproofing membrane should be paved parallel to the ridge; At 3% to 15%, the asphalt waterproofing membrane can be paved with parallel or perpendicular ridges; For roofs with a slope greater than 15% or subject to vibration, the asphalt waterproofing membrane should be paved vertically with the ridge, while the polymer modified asphalt waterproofing and synthetic polymer waterproofing membrane can be paved with parallel or perpendicular ridges; The upper and lower layers of coils should not be perpendicular to each other.

The purpose of making the above provisions on the direction of membrane paving is to reduce the lap joints of the membrane waterproof layer as much as possible while preventing the flow of the membrane waterproof layer, so as to ensure the integrity of the membrane waterproof layer and reduce the probability of water leakage.

When the roof slope is less than 15% (i.e., gently sloping roof), paving the membrane in the direction of the parallel ridge has the following advantages: (1) a membrane can be paved to the end, reducing joints and saving raw materials; (2) The working surface is large, which improves the construction speed and saves labor; (3) The lap joints on the long side of the membrane are perpendicular to the flow direction of the roof slope, which is the least likely to leak; (4) It can maximize the longitudinal tensile strength of linoleum, and improve the crack resistance of the membrane roof to a certain extent.

When the slope of the roof is greater than 15% (i.e., the steep slope roof), considering that the slope is steep, it is difficult to pave the membrane in the direction of the parallel ridge, and the heat resistance of the roof is higher and easy to flow, so it is more advantageous to use the vertical ridge direction to pave the membrane. As for the polymer modified asphalt waterproofing membrane and synthetic polymer waterproofing membrane, due to good temperature resistance, thin thickness, and no flow problem, there is no restriction on the paving direction.

For the roof subject to vibration, if the asphalt waterproofing membrane is paved in the direction of parallel ridges, it is easy to make the membrane waterproofing layer slip under the influence of vibration. Therefore, it should also be paved in the direction of the vertical ridge. However, synthetic polymer coils with high bond strength are not subject to this restriction.

As for the upper and lower layers of membranes, they are not allowed to pave vertically with each other, the reason is that there are many heavy seams in the membranes after paving, and the heavy seams are the weak parts that are most likely to cause water leakage.

In order to waterproof the flow of the roof, it is convenient for the membrane joints when it rains, except for the roof slope of less than 3%, the roof membrane of the rest of the slope should be paved in the direction of the vertical ridge.

There are from low to high, from bottom to top.

Specific requirements of membrane waterproofing construction specifications:

1. Ensure that the flatness, slope and surface dust, sand and debris of the construction surface are cleaned;

2. Detailed treatment: requirements for the retention of exhaust pipes, lattice joints, and water pipes out of the roof;

3. Strengthen the waterproof layer of the detailed nodes; On the same elevation working surface, the principle of "difficult first and then easy" should be followed, and large-area waterproofing membranes should be carried out.

When laying, the low place should be laid first, then the high place, and finally the façade and other protruding parts should be laid in the direction of the water.

There are many kinds of roofing, roughly there are cement roofs and steel structure roofs.

Steel roofing for the base layer requirements are relatively high, first keep dry and clean, if it is a rusty steel roof, you also need to do rust removal treatment, usually used materials are self-adhesive membrane acrylic waterproof coating and TPO waterproof membrane, construction needs professionals to carry out on-site construction, in order to ensure the quality of the project, I hope to help you!

1. The base layer is smooth, the strength of the leveling layer meets the requirements of the specification, no sand, no cracking, and the surface is clean and free of construction slag garbage; 2. The moisture content of the base layer is less than 9%, and the knife scratches are white; 3. Yin angle, asphalt membrane r is greater than 50, polymer membrane r is greater than, and the parapet wall is left with a waterproof membrane end groove, and the height is required to be greater than 300 after the completion of the project, and the general height is 400-500.

The base layer of the roof should be leveled, the uneven places should be leveled, a layer of primer should be laid, and the coil should be pasted to dry.

1.The surface of the screed layer should be compacted and flat, and there should be no crisp looseness, sanding, and peeling.

2.The junction of the membrane waterproof roof base and the protruding roof structure (parapet wall, vertical wall, skylight wall, deformation joint, chimney, etc.), as well as the corner of the base layer (water drop, cornice, gutter, gutter, ridge, etc.), should be made into an arc. A slightly lower pit should be made around the water drop for internal drainage.

3.Before laying the roof vapor barrier or waterproofing layer, the base layer must be clean and dry.

1. When the roof slope is less than 3%, the membrane should be paved parallel to the ridge.

2. When the roof slope is 3%-15%, the membrane can be paved with parallel or perpendicular ridges.

3. When the roof slope is greater than 15% or the roof is vibrate, the asphalt waterproofing membrane should be paved vertically, and the polymer modified asphalt waterproofing membrane and synthetic polymer waterproofing membrane can be paved with parallel or vertical ridges.

4. The upper and lower layers of coils shall not be perpendicular to each other.

Key points of glass roof waterproof construction First, the base requirements: leveling layer, flashing, slope meet the design requirements. At the junction of the plane and the vertical surface, the yin and yang angles are made into an arc of r 50mm or an obtuse slope with a slope width greater than 100mm.

The lattice joints and expansion joints meet the design requirements and are waterproof and sealed. The base surface is smooth, firm, clean and dry (9% moisture content). Second, coil paving:

Membrane paving direction: a. When the roof slope is less than 5%, it should be paved parallel to the ridge. b. When the roof slope is 5-15%, it can be paved parallel or perpendicular to the ridge.

c. When the roof slope is greater than 23%, it should be paved perpendicular to the ridge. Lap joint requirements and width of coil: a. The lap joint parallel to the roof ridge should be lapped in the direction of the flowing water, the lap joint perpendicular to the roof ridge should be lapped in the direction of the dominant wind, and the joints of the upper and lower houses and the adjacent two coiled lap materials should be staggered.

b. Lap width, full bonding method 80mm, partial bonding method 100mm. Coil bonding and paving method: a. The base layer must be accepted

Hot melt method: This method is applicable to coils with a thickness of 3mm. It can be used for full melt and full bonding and partial (point) melt and partial bonding, but the coil and coil overlap should be fully melted and fully bonded.

Pay attention to adjust the flame size of the flame heater and the distance between the nozzle and the coil, so that the asphalt temperature is between 200-250, and it is not allowed to overheat and bake through the coil. After hot melting, immediately rolling, the air under the coil should be excluded, so that it is flattened, not wrinkled, and rolled and bonded firmly, pay attention to the coil is smooth and straight, not twisted. The lap joint should be overflowing with hot-melted modified asphalt as the degree, and the interface should be scraped immediately.

b. Cold bonding method: full bonding method and partial bonding method can be used. The adhesive is evenly applied, without leakage and accumulation.

Pay attention to the control should exclude the air under the coil, and roll and bond firmly, pay attention to the coil is smooth, straight, not twisted, wrinkled. The lap joint is suffocated, and the hot melt method is used to make the roof waterproof, and the effect is ideal.

According to the requirements of the national standard "Roofing Engineering Quality Acceptance Code GB50207-2012", the provisions on the paving direction of the waterproof membrane during construction are as follows: 1. The membrane should be paved parallel to the ridge; 2. The upper and lower layers of coils shall not be perpendicular to each other.

The standard is to start with the downspout and then pave it horizontally to the height to avoid rainwater from entering the base layer when it flows downstream. Waterproof plugging consulting Zhengzhou Xinyu waterproof.

The roof slope is less than 3%, and it should be parallel to the direction of the ridge.

3% to 15%, 15% to 25% in parallel or perpendicular ridge direction (where appropriate), asphalt membrane should be vertical ridge, polymer membrane can be parallel or perpendicular ridge more than 25%, vertical ridge, and fixed measures should be taken, and the fixing point should be sealed.

The roof is usually paved with waterproofing membrane for waterproofing, so what are the requirements for waterproofing membrane paving? Next, I will briefly introduce you to a fierce reed.

1. Environmental requirements: In order to ensure the paving quality of the waterproof membrane, the temperature of the construction environment should not be lower than 5 or more than 35. Construction is not allowed on rainy and windy days.

2. Grassroots requirements: If the roof is flat, the drainage slope should be within the range of 2% to 3%, and the slope is too small or too large to find the slope. There can be no gaps in the concrete roof, and it needs to meet the requirements of flatness, compactness and cleanliness.

The corners of the roof and the root of the flue should be made into an arc.

3. Construction requirements: Before the waterproof membrane is paved, it should be used as a waterproof sealing treatment for separation joints and detailed additional layers. The coil should be paved from high to low, from far to near.

When laying the coil, there should be no hollowing, warping, wrinkles and other problems. The lap seam of the coil should be tightly sealed, and its lap width should not be less than 50 mm. After the construction of the waterproofing membrane is completed, it is necessary to carry out a water storage test and so on.

Second, how to choose waterproof materials.

1. There are many types of waterproof coatings, and their properties are different, and no waterproof coating is suitable for any place. When we choose waterproof materials, we should choose according to different waterproof environments, such as polymer cement waterproof coating for bathroom floor, polyurethane waterproof coating for reservoir anti-state oak, acrylic anti-sail waterproof coating for metal roof, etc.

2. When choosing waterproof materials, we should check the packaging of the product, such as checking the shelf life and production date of the product, and checking whether the waterproof coating has expired. The relevant information of the waterproof material is not clear and clear, and whether the product has a certificate, quality inspection report, etc. Generally, regular brand products will have anti-counterfeiting logos, and we can check the authenticity of products through the merchant anti-counterfeiting system.

What are the requirements for waterproofing membrane paving, I will briefly introduce it to you here. I hope that after reading this article, I can provide you with reference and help. If you want to know more about related information, you can continue to pay attention to this **.