Rolled Roofing Overlap

Overlap the next strip of roofing material with the first by at least 4 inches.

Rolled roofing 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. Cover hips or ridges last. Align the length of roll roofing with the lowest edge of the flat roof and flush to the side edge of the roof. 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. How to do it attach first course. How to install roll roofing on low slope roofs. Learn about the liberty sbs self adhering base ply sheet.

Video of the day. Roll roofing overlap horizontal choose the overlap width according to the number of plies of roof to be installed. This will help to protect the subsurface. 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.

8 when you encounter a roof valley trim the roll roofing so it ends 1 2 inch from the valley s center. Position the first course so it overhangs the drip edges by about 1 4 inch and roll it out a. Check the sheathing for any nails or screws that may be. Continue to attach the material with nails every 3 inches.

Smooth down the sheet with your hand to adhere the roll roofing to the roof deck. Extend the front edge of the drip edge so it runs off the roof and into the. 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. 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.

The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. Attach drip edge along the edge of the roof with roofing cement. Pull back 6 inches of the release paper in order to position the start of the roofing sheet accurately. Clean the roof with a broom to remove any debris.

Plan so that no two butt joints are closer than 2 feet from each other. Use a 6 inch swath of roofing cement to attach the ends of your strips of roll roofing to the roof itself.