How To Install Underlayment On A Hip Roof

Hammer down any large nails that are exposed by the removal.

How to install underlayment on a hip roof.

Inspect the underlying roof sheathing for damage and make any needed repairs. Pick a corner to start placing the plywood sheathing. Sheathing goes onto a roof prior to the final roofing material e g shingles. Learn more about how to install owens corning proarmor synthetic roof underlayment.

Peel the release liner from the membrane. Start at the bottom of one side of the roof at the right or left edge. Install a layer of roofing insulation as recommended by the roofing manufacturer. Start from the top of the roof and remove the old shingles along with the flashing underlayment and vents.

Cut the membrane into 10 to 15 foot lengths and re roll loosely. Adding various types of roof vents either hip vents or mushroom vents for example could help you get close to code requirements for venting. Start the roof felt at one bottom corner of the roof. Where the drip edge meets a valley or a hip cut the pieces with overlapping tabs.

Install underlayment a minimum of 6 inches up roof protrusions or vertical abutments. Tack it in place at the corner with the end flush with the end of the roof and the bottom edge of the roll right along the bottom of the roof. Use nails to tack the sheet in place on the rafters to hold it in place while you work. Nail the plywood sheathing to the rafters.

This would create a great roof but it would be expensive and it s probably overkill. Roofing felt comes in rolls that feature pre marked lines 2 to 3. Install a single vertical length of underlayment roll centrally over hips and down valleys before weaving horizontal underlayment across the valleys and hips. Where drip edge pieces meet overlap them by at least 2 inches.

This also applies to metal hip or valley flashings that may be specified. For more information on this approach see how to install rigid foam on top of roof sheathing. Position the first row of roofing felt flush on the bottom with the edge of the gutter apron. Press the membrane of the self adhering roofing underlayment in place with heavy hand pressure to ensure the desired adhesion to the roof deck.