How To Restrip In A Built Up Asphalt Roof
A gravel and tar built up roof is exactly that layers of gravel and asphalt laminated felt on top of a flat roof.
How to restrip in a built up asphalt roof. Asphalt is the glue that holds a built up roof together. I have seen many roofers in the la area that apply the torch down over the bare plywood or wood technically that is wrong but again nothing can stop yo. Use the trowel to press the patch fully into the flashing cement. B after you ve pushed away the gravel use the brush to sweep away any loose dust and debris.
After both layers of fabric have been installed apply a finish coat of asphalt mastic to the roof patch. Easier installation on a hot built up roof the multiple plies are fused together using hot mopped asphalt to create a monolithic barrier. A use the flat portion of your pry bar to scrape away the gravel from the leaking section. The gravel and tar built up roof is the one most commonly known.
Draw the pry bar in one direction not back and forth and push the gravel at least 4 to 6 inches past the leaking section. Building paper or a base sheet is not considered as a layer. It also seals and protects the entire roof delivering up to five times greater water resistant thickness. Place the second step flashing piece over the end shingle in the first course by positioning it 143 mm 5 5 8 above the bottom edge of the exposed asphalt shingle.
Embed a single layer of 6 cotton fabric over the patch ensuring it extends beyond the 4 inch patch in all directions. Secure the horizontal flange to the roof. The built up roof is generally a flat roof or a low pitched roof which is made of a number of levels. The built up roofing membrane is to be aggregate surfaced three layer glass fibre felt construction using asphalt or four layer organic felt and coal tar bitumen.
Built up roof bur systems made with asphalt have been a mainstay of the low slope roofing industry for over a century but keep evolving with the times. Make sure that the tab of the shingle in the second course will cover it completely.