Rolled Roofing Overlap

Plan so that no two butt joints are closer than 2 feet from each other.

Rolled roofing overlap.

Use a 6 inch swath of roofing cement to attach the ends of your strips of roll roofing to the roof itself. Video of the day. Overlap the next strip of roofing material with the first by at least 4 inches. This will help to protect the subsurface.

Continue to attach the material with nails every 3 inches. 8 when you encounter a roof valley trim the roll roofing so it ends 1 2 inch from the valley s center. 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. Cover hips or ridges last.

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. Extend the front edge of the drip edge so it runs off the roof and into the. Position the first course so it overhangs the drip edges by about 1 4 inch and roll it out a. Smooth down the sheet with your hand to adhere the roll roofing to the roof deck.

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. 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. Sbs roll roofing overlap width is commonly 3 4 or 3 6 varying by product and also referred to as the selvage edge width.

The overlapping felt creates a secondary barrier for moisture and wicks water away from the shingles above and the sheathing below. Roll roofing overlap horizontal choose the overlap width according to the number of plies of roof to be installed. 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.

To seal a plumbing vent spread roofing. 2 or 3 varies by manufacturer or 16 12 or 9 exposure for 2 3 or 4 ply roofs respectively. 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. Therefore a 2 inch overlap provides redundancy at the edges where the barrier is weakest.

Check the sheathing for any nails or screws that may be. How to install roll roofing on low slope roofs.