How To Install Underlayment On A Hip Roof

Cut the membrane into 10 to 15 foot lengths and re roll loosely.

How to install underlayment on a hip roof.

Press the tabs firmly to make crisp corners with no gaps and attach with roofing nails. 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 also applies to metal hip or valley flashings that may be specified. Use nails to tack the sheet in place on the rafters to hold it in place while you work.

How to lay roofing felt on a hip roof. Pick a corner to start placing the plywood sheathing. Install a layer of roofing insulation as recommended by the roofing manufacturer. Position the first row of roofing felt flush on the bottom with the edge of the gutter apron.

Start at the bottom of one side of the roof at the right or left edge. Sheathing goes onto a roof prior to the final roofing material e g shingles. For more information on this approach see how to install rigid foam on top of roof sheathing. Install underlayment a minimum of 6 inches up roof protrusions or vertical abutments.

Peel the release liner from the membrane. Roofing felt comes in rolls that feature pre marked lines 2 to 3. Press the membrane of the self adhering roofing underlayment in place with heavy hand pressure to ensure the desired adhesion to the roof deck. Where the drip edge meets a valley or a hip cut the pieces with overlapping tabs.

Start from the top of the roof and remove the old shingles along with the flashing underlayment and vents. Start the roof felt at one bottom corner of the roof. Where drip edge pieces meet overlap them by at least 2 inches. Nail the plywood sheathing to the rafters.

Peel back 1 to 2 feet of release liner align membrane. Install a single vertical length of underlayment roll centrally over hips and down valleys before weaving horizontal underlayment across the valleys and hips. Hammer down any large nails that are exposed by the removal. Inspect the underlying roof sheathing for damage and make any needed repairs.