If you re doing this in the winter roll your roofing sheets out in a garage.
Roll roofing cracked.
Rolled roofing usually expands and contracts with temperature changes as the building settles and the roof ages.
As this happens the different layers become wavy or blisters can develop and crack open.
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As a rule because roll roofing can crack in cold weather it should not be applied when the temperature is below 45 f.
Extend the layer several inches beyond each end of a crack.
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If the job must be done anyway store the rolls in a warm place prior to application or unroll and cut them into strips no longer than 18 feet and let them lie on the roof until they are flat.
Roll out the roofing sheets and lay them flat on the ground.
Cold weather damages roofing sheets.
Nail it down exactly as you did the 18 inch roofing.
Ultraviolet light from the sun boils the volatiles out of the asphalt and the asphalt becomes brittle and unable to withstand the shrinkage and expansion forces induced by temperature changes.
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.
Apply a uniform layer of roof mastic along a crack using a wooden applicator or a paint stick.
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Place bricks in the corner to keep it down and reduce resistance later.
Cracks in roll roofing are usually the result of shrinkage.
Again trim any roofing that extends beyond the edge of the roof.
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.
Place a sheet of 36 inch roll roofing directly over the 18 inch roofing that is covering the valley.
5 roll out a strip of roofing mesh that s.
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