Then working from the other side overlap the valley strike a chalkline and trim the piece at the center of the valley.
Rolling roof overlap inches.
It has just one layer so it goes.
If lap sealant is used simply apply a bead of sealant on top of the underlap ridge going all the way down the length of the ridge before the overlap ridge of the next panel is placed on top.
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Owens corning deckseal sa sbs cap 39 375 ft w x 32 833 ft l 100 sq ft shasta white roll roofing.
Ft sbs self adhering cap sheet roll for low slope roofing in black.
The measurement of 35 inches 89 cm is the default measurement used by most roofing professionals.
Roll roofing is different.
In other words if the height of the roof drops by 2 inches for every 12 inches in length you will need to use sealant to strengthen the overlap barrier.
Keep nails at least 12 inches from the center of the valley.
Use a 4 inch wide bed of roofing cement to attach everything that is closer than 12 inches.
How to install roll roofing on low slope roofs.
Using a measuring tape measure 35 inches 89 cm up from the bottom of the roof and make a mark with chalk.