How To Install A Modified Bitumen Flat Roof

Repeat this with each roll until the roof is covered overlapping each sheet by about 3 8 in 0 95 cm.

How to install a modified bitumen flat roof.

Start at 1 end of the roof and unroll the bitumen to the other end. Cut the roofing but still maintain the allowance you ve set for it. Use a primer to prepare the roof. Install drip edge flashing and apply a primer so the roofing will adhere to.

Roll the roofing materials and then turn on the propane torch. Self adhering modified bitumen roll roofing is designed for flat roofs with a pitch or 4 12 or less typically found over shed type garages and second floor porches. Use flashings approved by your building department. The heating process allows the material to adhere to the roof surface.

If you install the smooth product cover it with aluminum coating. A modified bitumen flat roof is composed of asphalt that is reinforced with fiberglass material and other modifiers. Stick roofing material that installed correctly should last many years. Many times modified bitumen roofs are installed by rolling out the roofing material after it has been heated with a blow torch.

Make sure the roofing is flat and free from creases and bubbles. Rollback the roofing again and switch on your propane torch. Step 4 heat the roof. Using cap nails secure the felt in rows.

They come in rolls that workers apply using hot and cold temperatures. Bitumen roofing rolls can be large and heavy so get help carrying them up to the roof if necessary. This combination results in maximum durability. You will need one for sealing the concrete roof.

A modified bitumen roof mbr also known simply as a bitumen roof is a type of built up roofing system that s designed for installation on a flat or low slope roof modified bitumen is composed of layers of bitumen that have been blended with synthetic rubberized polymers. Modified bitumen roofing may have a granular surface as shown here or it may be smooth. Cut the sheets but at a larger size than the roof. Get a sheet of bitumen roofing and roll it out allowing an extension beyond the perimeter of the roof.

Roll modified bitumen roofing sheets over the entire roof. Wear protective clothing prior to this procedure. Install heavy roofing felt with overtop your decking old roof or insulation. How to install torch down modified bitumen roofing ensure your flat roof is entirely clear of debris.

Now get a sheet of bitumen and roll it out. As with other types of modified bitumen materials. Consult with your inspector to see whether you need to tear off the old roofing or if you can reroof over the existing roofing.