Rolled Roofing Overlap

7 apply the next piece of roll roofing so the overlap covers the nail heads using roofing cement to secure the 2 pieces of roofing together.

Rolled roofing overlap.

Apply cement at all of the seams and nail down all sheets as you progress leaving room for about one inch of overhang on each side. Overlap the next strip of roofing material with the first by at least 4 inches. This will help to protect the subsurface. Cover hips or ridges last.

Clean the roof with a broom to remove any debris. Liberty sbs self adhering roofing system will provide long lasting protection for the low slope areas of your property without the danger or hassles associated with the installation of other conventional roofing products. Learn about the liberty sbs self adhering base ply sheet. To seal a plumbing vent spread roofing.

How to do it attach first course. 8 when you encounter a roof valley trim the roll roofing so it ends 1 2 inch from the valley s center. How to install roll roofing on low slope roofs. Align the length of roll roofing with the lowest edge of the flat roof and flush to the side edge of the roof.

Roofing felt is required to overlap 2 inches over the lower felt course. 2 or 3 varies by manufacturer or 16 12 or 9 exposure for 2 3 or 4 ply roofs respectively. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest. Pull back 6 inches of the release paper in order to position the start of the roofing sheet accurately.

Plan so that no two butt joints are closer than 2 feet from each other. The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. Smooth down the sheet with your hand to adhere the roll roofing to the roof deck. Continue to attach the material with nails every 3 inches.

Sbs roll roofing overlap width is commonly 3 4 or 3 6 varying by product and also referred to as the selvage edge width. Use a 6 inch swath of roofing cement to attach the ends of your strips of roll roofing to the roof itself. Attach drip edge along the edge of the roof with roofing cement. Roll roofing overlap horizontal choose the overlap width according to the number of plies of roof to be installed.

Check the sheathing for any nails or screws that may be. Continue to stagger the rows as you work with a two inch overlap on the horizontal seams and a six inch overlap on the vertical seams.