How To Install Underlayment On A Hip Roof

Roofing felt comes in rolls that feature pre marked lines 2 to 3.

How to install underlayment on a hip roof.

Where the drip edge meets a valley or a hip cut the pieces with overlapping tabs. 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. Learn more about how to install owens corning proarmor synthetic roof underlayment. For more information on this approach see how to install rigid foam on top of roof sheathing.

Start at the bottom of one side of the roof at the right or left edge. How to lay roofing felt on a hip roof. Install a single vertical length of underlayment roll centrally over hips and down valleys before weaving horizontal underlayment across the valleys and hips. Position the first row of roofing felt flush on the bottom with the edge of the gutter apron.

Install a layer of roofing insulation as recommended by the roofing manufacturer. Nail the plywood sheathing to the rafters. This also applies to metal hip or valley flashings that may be specified. Start from the top of the roof and remove the old shingles along with the flashing underlayment and vents.

Press the tabs firmly to make crisp corners with no gaps and attach with roofing nails. Start the roof felt at one bottom corner of the roof. Press the membrane of the self adhering roofing underlayment in place with heavy hand pressure to ensure the desired adhesion to the roof deck. Use nails to tack the sheet in place on the rafters to hold it in place while you work.

Peel the release liner from the membrane. Inspect the underlying roof sheathing for damage and make any needed repairs. Install underlayment a minimum of 6 inches up roof protrusions or vertical abutments. Sheathing goes onto a roof prior to the final roofing material e g shingles.

Pick a corner to start placing the plywood sheathing. Peel back 1 to 2 feet of release liner align membrane. Adding various types of roof vents either hip vents or mushroom vents for example could help you get close to code requirements for venting. This would create a great roof but it would be expensive and it s probably overkill.