How To Lay Felt On Concrete Roof

This will give you extra felt to hang over.

How to lay felt on concrete roof. Lay fiberglass mesh over the roof and cut it to length. The felt keeps the roof deck dry before shingles go on protects against wind driven rain as shingles fail and increases fire resistance. The first section of the tiles is cut to size and attached to the roof starting at a lower edge and working up. You will be looking for any decking that has rotted or bowed.

If it were me i would go with a top quality sbs modified and polyester reinforced 2 layer felt system. Check to ensure the roof is in good enough condition to walk over. Use roof adhesive to fix down the tiles as each one is slid into place and nail the tiles down. This layer is not bonded to the decking so that the decking can move without damaging the felt roof.

Installing any gutter drips. Laying the second bonded layer of underlay felt. Most pros use this line to begin shingling working left and right toward the rakes. Step 2 placing the felt.

Step 1 prep work. Laying the felt the roofing felt should be applied in layers that overlap. Calculate the area of your roof by combining the area of each surface. Then use a utility knife or scissors to trim away the excess so the mesh fits tightly against the roof.

You can install the mesh over old roofing material or insulation. Spread the mesh pieces side by side overlapping them by about 3 8 in 0 95 cm. Will last you 35yrs. Cutting your felt pieces.

Start by measuring the length and width of one side of the roof in. Add about 2 inches 5 cm to each of your measurements before calculating the area. As you work the paper can be tacked down in the center so it won t blow away. If the felt is in a brittle aged condition then i would suggest you strip back to the concrete first.

If there are roof battens nail the tiles to them. Otherwise attach the tiles to the roof felt. How to lay felt on a flat roof. Go to a roofing merchant rather than b q for materials.

Next find the center of the roof at the top and the eave then snap a vertical chalk line.