Roll roofing overlap horizontal choose the overlap width according to the number of plies of roof to be installed.
Roll roof selvedge edge overlap.
Lay the first strip of material so that it overhangs the drip edges of your roof by about a quarter inch.
Apply the first course with a full width strip of roll roofing so that its lower edge and ends are flush with the edge strips at the eaves and rakes.
Fasten the upper edge with nails so that the next course will overlap them a mini mum of 1.
The ends of each row of roofing are folded back to allow room to apply a 6 inch band of roofing cement before they are nailed into place every three inches along the edge of the overlap.
Sbs roll roofing overlap width is commonly 3 4 or 3 6 varying by product and also referred to as the selvage edge width.
Tamko 19 selvedge edge roll roofing is constructed from tamko s organic mat impregnated with hot asphaltic saturant then coated on both sides with weathering grade asphalt and surfaced with mineral granules in a 17 wide path starting.
Lift the lower edge of the first course and cover the edge strips with lap cement.
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If it does have to be installed in cold weather cut it into 12 to 18 foot sheets and lay them flat inside a garage to warm up and flatten out.
Selvage edge roofing is installed the same way as full width roll roofing except that each course overlaps the previous course 19 inches instead of 4.
This technique will also work with full width rolls if you cannot find selvage edge roll roofing in your local store.
2 or 3 varies by manufacturer or 16 12 or 9 exposure for 2 3 or 4 ply roofs respectively.
The nails should be about 1 inch from the edges.
This should give you a 1 inch overhang on the eaves including the top edge of.
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Place the top edge of the roofing along the chalk line.
Overlap the next strip of roofing material with the first by at least 4 inches.
Attach the strip to the roof every 3 inches with nails pulling it tight as you go.
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Roll roofing is not very pliant or flexible in cold weather of fewer than 45 degrees fahrenheit and it can crack and break if it is manipulated while cold.
For extra protection add a 3 foot wide strip on top of the 18 incher.
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Position the first course so it overhangs the drip edges by about 1 4 inch and roll it out a distance of 8 feet or so.
Roll out and cut roll roofing to cover the length of the roof.
