Overlap On Roof Felt

Roofing felt is required to overlap 2 inches over the lower felt course.

Overlap on roof felt.

Position the second row of felt so that it overlaps the first row. If the roof felt tears cut a piece large enough to cover the tear with lots of overlap slip the top under the next lap. Overlap the end of a roll about 4 inches with the start of a new roll and fasten both pieces to the. Felt underlayment can overlap more than 2 inches to provide an adequate barrier.

Now you ll use the top line on the first row as a guide for installing the second row. Continue along the roof to the other end and trim the felt flush at the end with a utility knife. Use a heavy duty felt for long term weatherproofing. If there is no ridge ventilation the breather membrane should go over the ridge and overlap each side of the ridge line by the required overlap.

Once again leave 8 inches of excess at the side of the bottom edge of the felt. The drip edge should extend at least 2 inches on the roof. A conventional roll of felt is enough for 432 square feet. The first step in felting a shed roof either angled or flat is calculating the exact.

Either walk over the felt with your feet to ensure a tight secure fit or pat it down with your trowel. Tack the roofing felt down with 1 4 staples using an air compressor with a pneumatic stapler a hammer tacker or a staple gun every 12 inches. The felt must be flush at the rake side edges have 4 inch overlaps where two pieces are joined and 6 inch overlaps on hips and ridges. As you work the paper can be tacked down in the center so it won t blow away.

Clean and prepare the. For a more permanent roof coverage use roll roofing. The process of felting a shed roof step 1. How much should i overlap my felt underlayment on my roof.

Buy the roof felt. Laying the felt the roofing felt should be applied in layers that overlap. Since you will have overlap. Start at the bottom of the roofline and work up so any water that gets through the roofing material will shed down the tar paper and will not go under it.

As before you will need to make sure that there are no air bubbles between layers. The vertical leg of the drip edge should be at least 1 5 inches wide and extend at least 0 25 inches below the sheathing. Must be installed at the rakes and eaves of the roof adjacent pieces of drip edge should overlap at least 2 inches 51 mm. Ensure that the felt lies flat and smooth before securing it.

On roof valleys ensure the breather membrane is extended by a minimum of 300mm on each side measured from the centre of the valley.