When using a bituminous waterproofing membrane for reinforced concrete roof waterproofing, it is crucial to follow the manufacturer’s specifications and safety manuals. These membranes are typically delivered to the site in sealed rolls after being manufactured and packed in the factory. Before installation, it is essential to read and understand the specifications and safety guidelines provided by the manufacturer.
One of the most critical aspects of working with bituminous waterproofing membranes is fire safety and prevention. It is crucial to remove all inflammable materials from the roof area and follow good roofing practices to prevent any potential fire hazards.
During installation, the bituminous waterproofing membranes are unfolded on the site and carefully laid on the surface. Tar-based adhesives are typically used, and blowtorches may be used to heat and melt the adhesive, ensuring a firm bond between the membrane and the roof surface. It is important to follow proper procedures and use caution when working with blowtorches to ensure safety at all times.
To protect the structural roof from water seepage, a layer of bituminous waterproof membrane is applied. This membrane acts as a shield, preventing water from infiltrating the roof. In addition to the membrane, roof tiles are also installed, along with filler material that is sloped to allow water to flow into drains. It is crucial to ensure the proper slope of the filler material, as this allows water to flow smoothly towards the drains. The waterproof membrane typically has a thickness of 2 to 4 mm and is made of flexible material with an elongation of 150% to cover any small cracks. It should also be strong, chemical-resistant, UV-resistant, and flexible enough to conform to the shape of the roof on which it is laid.
Procedure for Roof Waterproofing Using Bituminous Waterproofing Membrane
Roof Surface Preparation
Before installing a membrane, it is crucial that the surface is free from dirt and debris, and is completely dry and clean. Adverse weather conditions should be avoided during the installation process. It is also important to note that the membrane should not be installed in temperatures below 450 degrees Fahrenheit.
When it comes to laying the membrane, the slope of the surface is a key factor to consider. If the slope is up to 3 inches, the membrane should be laid perpendicular to the slab. On the other hand, if the slope is more than 3 inches, the membrane should be laid parallel to the slope. This technique ensures that water will never run at the joint lap edge, which helps to prevent any potential damage or leakage.
Torch Equipment
Properly connecting torch equipment and ensuring that hoses are in good working condition is crucial. It is important to take extra precautions and check for any gas leakage by using soapy water. This is to ensure that the equipment is safe to use and minimize any potential hazards.
When opening the torch, it is recommended to start with the lowest possible settings. This is to prevent sudden gushes of fire that can be dangerous and cause harm. Taking the time to ensure that the torch is properly set up and in good working condition can go a long way in promoting safety and preventing accidents.
Roll Alignment
When laying a membrane, it is essential to ensure that there are no wrinkles present. Wrinkles can compromise the effectiveness of the membrane and lead to problems in the long term. Therefore, it is crucial to take the necessary precautions to ensure that the membrane is laid smoothly and evenly.
In addition to avoiding wrinkles, proper alignment is also critical when laying a membrane. This means that the membrane should be aligned correctly with the surface it is being applied to. Proper alignment helps to ensure that the membrane performs as intended and that it provides the necessary protection against moisture or other external factors.
To summarize, the correct installation of a membrane involves ensuring that there are no wrinkles present and that the membrane is properly aligned. These are important factors that should not be overlooked during the installation process. By following these guidelines, the membrane can perform optimally and provide the intended protection.
Bituminous Waterproofing Membrane installation
The given context describes the ideal method for applying torch fire to a roll while laying it down. It emphasizes the importance of uniform and slow application of the torch fire to ensure the best results. The recommended movement of the torch is depicted in a picture accompanying the instructions. By following these guidelines, the process of applying torch fire to the roll can be optimized for the desired outcome.
Compound flow out
To ensure that gaps between joints are properly filled during torching of waterproofing membranes, it is recommended to allow approximately 1 inch of chemical to flow out. This ensures that the membrane is adequately filled, and there are no gaps left between the joints. However, if more than 1 inch of the chemical flows out during torching, it is an indication of overheating of the membrane, and the process should be stopped immediately.
To ensure that the compound sets properly and there are no gaps left in the joints, it is recommended to use a roller while torching. This helps to apply pressure on the joint, allowing the compound to set in correctly. It is crucial to ensure that no gaps are left in the joints as this can lead to water seepage, which can cause significant damage to the structure. Therefore, it is essential to follow the recommended guidelines while torching waterproofing membranes on joints.
Check Joints between Waterproofing Sheets
Ensuring a perfect joint between two sheets is a critical aspect of any construction project involving membranes. It is essential to thoroughly examine all edges of the joints to ensure that the end laps of the membrane are properly adhered to each other. Any air gaps that may be present can compromise the integrity of the joint and cannot be accepted. Therefore, it is imperative to carefully inspect the joints and lift any areas where there are gaps between the sheets. Once lifted, the sheets should be heated with a torch and resealed to ensure a seamless joint. This process is crucial for maintaining the strength and durability of the joint and should not be overlooked during any construction project involving membrane installation.
End Laps in Waterproofing Membrane Sheets
Proper heating of the end of the bituminous waterproofing membrane sheet is necessary to ensure that the bitumen appears over the sheet. This process should be done carefully to ensure that the underside of the membrane is heated evenly for a secure bond at the laps. For a strong and waterproof joint, the sheets are overlapped by 3 inches on the sides and 6 inches at the ends. This overlapping method helps to prevent water seepage through the joint. In addition, it is important to ensure that the end laps are staggered and at least 18 inches apart from each other. This will prevent any adjacent end laps from coinciding, which could weaken the joint and allow water to seep through.
Granules Applications
The application of granules is carefully matched to the sheet at the end laps, ensuring a precise and seamless appearance. A roller is then used to evenly spread the granules, setting them in place and giving the roof a polished and professional finish. These meticulous applications of granules not only enhance the overall aesthetic of the roof, but also ensure its durability and longevity, providing a high-quality result that is sure to impress.