What problems should be paid attention to when pasting the membrane of the membrane waterproof roof

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Waterproofing construction of roofs.

Roof waterproofing construction technology.

Roof waterproofing adopts membrane waterproofing, process flow (hot melt construction):

Clean up the base layer. Apply a base treatment agent.

Lay an additional layer of coiled material.

Paving the coil. Hot melt edge banding.

Clean up the base layer: clean up the dust and debris on the surface of the base layer that has passed the acceptance before construction.

Coating base treatment agent: polymer modified asphalt membrane construction, according to the product instructions for the use of the base treatment agent, the base treatment agent is to add neoprene asphalt adhesive to industrial gasoline dilution, stir evenly, with a long roller brush evenly painted on the surface of the base layer, after 4 hours at room temperature, begin to pave the coil.

Additional layer construction: Generally, the modified asphalt membrane is used by the hot melt method to construct the waterproof layer, and the additional layer is strengthened in the details such as the parapet, water drop, pipe root, cornice, yin and yang corner, etc., and the sealing paste is used to embed.

Paving coil: The number of layers and thickness of the coil should meet the design requirements. Cut the modified asphalt waterproofing membrane into the corresponding size, and roll it with the original roll center for later use; When paving, the junction of the base and the coil is heated with the flame spray gun, the spray gun is about 300mm away from the heating surface, and the uniform heating is carried out through round trips, while the material surface of the coil has just melted, the coil is rolled forward and pasted, and the lap joint part should be fully viscosy and firm, and the lap width is 100mm.

Hot melt edge banding: heat the lap joint of the coil with a spray gun, make the two bond firmly while hot, and extrude the asphalt at the edge to the degree; The end end is tightly inserted with sealing paste.

Quality requirements. 1) The variety, specification and performance of waterproof materials must meet the design requirements and relevant regulations. After the waterproof material enters the site, it must be inspected and accepted, and sampling retest shall be carried out according to the regulations, and shall not be used if the retest is unqualified. If product quality problems are found in the process of use, retest at any time.

2) The paving method and lap joint and end of the membrane waterproof layer meet the provisions of the construction specifications, the bonding is firm and stable, the joints are tightly sealed, and there are no defects such as damage and hollowing.

The detailed practices of the membrane waterproof layer and its deformation joints, cornices, flashing, water drops, embedded parts, etc., must meet the design requirements and construction specifications.

4) The surface of the coil shall not accumulate water.

Finished product protection. 1) The waterproof layer of the membrane that has been paved should be protected in time and should not be damaged, so as not to cause future troubles;

2) The waste paper, hemp rope and plastic sheet temporarily blocked in the construction of deformation joints and floor drains should be cleaned out in time to keep the pipe unblocked;

3) After the construction of the waterproof layer is completed, the protective layer should be done in time or the earthwork backfill should be carried out in time.

The base layer is coated with a scraping base treatment agent, which is required to be thin and uniform, and generally after drying, it can be paved with coil material when it is not sticky; (2) The paving of the membrane waterproof layer should generally be constructed by the lowest elevation of the layer upwards parallel to the ridge, so that the membrane is lapped in the direction of the water flow, and when the roof slope is greater than 10, the membrane should be paved perpendicular to the direction of the ridge; (3) Paving method: peel off the isolation paper on the ridge surface of the coil, paste the coil on the surface of the base layer, keep the long side lap of the coil 50mm, keep the short side lap 70mm, the coil is required to maintain a natural relaxation state, do not pull too tight, after the coil is paved, it should be fully compacted with a plane vibrator immediately, and the vertical part is knocked with a rubber hammer; (4) Lap bonding of coil material: After the coil is compacted, the lap joint part is lifted, and the lap adhesive is evenly brushed with a paint brush, and the two adhesive surfaces of the coil joint are lifted, and when the feel is not sticky for a while after drying, the bonding can be carried out, and then the rubber hammer is used to knock and press it tightly to avoid water leakage caused by the seam; (5) The construction temperature of the waterproof layer should be more than 5.

Summary. Waterproofing membrane construction method.

1. Hot adhesion method.

The construction method of using Rema grease or hot-melt modified asphalt adhesive for bonding between coil and base layer, coil and coil. The hot adhesive method requires on-site heating of the binder, which is dangerous in construction, complex in process, and difficult to ensure in quality, so it is generally rarely used now.

2. Cold adhesive method.

Use a rubber scraper to evenly apply a cold adhesive such as polymer modified asphalt adhesive or cold marti grease to the surface of the base layer, and control the thickness evenly, and use a rubber roller to push the coil while laying the coil to remove air to compact. When the ambient temperature is below 15 degrees Celsius, the lap joint and the end of the coil should be treated by the hot melt method.

3. Self-adhesive method.

This is a construction method that uses a waterproofing membrane with self-adhesive tape, and does not require thermal construction or cementing materials.

4. Hot melt method.

Use a flame spray gun or other heating tools to evenly heat the bottom surface and base layer of the coil, and when the asphalt on the surface begins to melt and is in a black and shiny state, the coil is laid while baking and compacted with a pressure roller. Care should also be taken to adjust the size and speed of the flame so that the bitumen temperature is between 200-250 degrees Celsius. After the construction is completed, the lap edge should be sealed with cold adhesive.

5. Welding method.

The construction method of lap bonding of waterproofing membrane by using hot air welding gun.

The membrane waterproofing layer can be applied by the hot adhesive method + whether it is correct.

Hello, the membrane waterproof layer can be constructed by the hot adhesive method, no, it should be the hot melt method. In order to prove the quality of construction operation of sensitive slag and waterproof membrane paving, the indoor ambient temperature is +50C +350C air temperature, and the hot melt method can be constructed under the condition of more than 100C gas side grinding temperature.

Waterproofing membrane construction method 1, hot adhesive method using Therma or hot melt modified asphalt adhesive for the membrane and the mountain base, membrane and membrane bonding construction method. The hot adhesive method requires on-site heating of the binder, which is dangerous in construction, complex in process, and difficult to ensure in quality, so it is generally rarely used now. 2. The cold adhesive method uses a rubber shed skin scraper to evenly coat the polymer modified asphalt adhesive or cold marti grease and other cold adhesives on the surface of the base layer, and control the uniform thickness, and use a rubber roller to push the coil while laying the coil in order to exclude air to compact.

When the temperature of the ring is lower than 15 degrees Celsius, the lap joint and the end of the coil should be treated by hot melt method. 3. The self-adhesive method adopts a waterproof membrane with self-adhesive, which does not require thermal construction or cementing materials. 4. The hot melt method is evenly heated with a flame spray gun or other heating tools on the bottom surface and base of the coil, and when the asphalt on the surface begins to melt and is in a black and bright state, the coil is paved while baking and compacted with a pressure roller.

Care should also be taken to adjust the size and speed of the flame so that the bitumen temperature is between 200-250 degrees Celsius. After the construction is completed, the lap edge should be sealed with cold adhesive. 5. The welding method uses a hot air welding torch to carry out the construction method of lap bonding of waterproof membrane.

Detail practice of waterproofing membrane: the base layer at the intersection of flashing and roof should be made into an obtuse angle (>1350) or arc (r=50 100mm), and the height of the waterproof layer to the vertical surface should not be less than 250mm, often 300mm; The closing of the membrane should be tight, in order to prevent water seepage at the closure, and the waterproof cornice of the membrane is divided into several forms of free falling, outer eaves, and gutters in the parapet wall. There are four paving methods in the roof waterproofing membrane, if you want to understand the detailed practice of roof waterproofing, this is also one of the very important links, you may wish to refer to these 4 methods.

1.Hot Teaser Melt Method:It refers to the use of heaters to melt the hot melt adhesive at the bottom layer of the waterproof membrane, and the method of realizing the bonding between the membrane and the base layer is called the hot melt method.

2.Cold Bonding:It refers to the method of using cementing materials to directly realize the bonding of waterproofing membrane and the base layer, which is called cold bonding method.

3.Self-adhesive method:Refers to the use of waterproofing membrane with self-adhesive adhesive, without thermal processing, without additional cementing materials, and directly realize the waterproofing membrane and the method of bonding with the base is called self-adhesive method.

4.Hot asphalt method: refers to the method of using hot asphalt cementing material to directly realize the bonding of waterproofing membrane and base layer, which is called hot asphalt method.

According to the different construction processes, the roofing membrane can be constructed by methods such as full paste, strip sticking, point sticking and empty paving. When paving, the air under the coil should be discharged at the same time, the coil is smooth, the bond is firm, the seam must be fully glued, and the seam is tight.

1.Full stickyThat is, when the waterproof membrane is paved, the construction method of bonding the entire area of the membrane and the base layer.

2.StickyWhen paving the waterproof membrane, the membrane and the base layer are only bonded with strips.

That is, a strip bond with a width of 200 250mm is done in the middle of the coil width. Strip bonding, also known as strip laying, has a bonding area of not less than 25%.

3.Point stickyWhen paving the waterproof membrane, the membrane and the base layer only implement the construction method of point bonding, also known as the flower paving method.

The total area of bonding is generally 6%, and there are more than 5 points of bonding per square meter, and the area of each point is 100 100mm.

4.Empty shopThat is, when paving the waterproof membrane, in addition to the tight bonding between the lap joints between the membranes, the membrane and the base are only bonded within a certain width around them, and the rest of the parts are not bonded construction methods.

After the waterproofing membrane is paved, it must be protected so as not to affect the waterproof effect. Lay a 300mm 300mm expanded perlite insulation block on the waterproof layer, and then add a layer of 3cm thick cement mortar protective layer on it, which is covered with steel wire mesh, and the protective layer is divided into lattice seams, and the seams are filled with sealing materials to better protect the waterproof layer.