Modified roofing installation

Peel-and-stick modified bitumen roofing installation is more suitable for a DIY job, as there is no danger of fire and no fumes to contend with. The beginning of a peel-and-stick installation starts out the same as the torch-down. Start the process after step 5. Roof Repair. Roof Replacement. Roof Installation. New Roof. Roofing Companies.

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Get free local quotes. Project info Offers. Choose a type of project. New Storm Windows. What is the nature of this project? Replace the roof. Install roof on new construction. Repair existing roof. What kind of roofing do you need? Asphalt Shingle Roofing. Wood Shake or Composite Roofing. Flat, Foam or Single Ply Roofing. Metal Roofing. Allow it to overhang the rake or side of the roof by a couple of inches; you will cut it precisely to length later. Take care to avoid bubbles or creases.

Check that the roofing lies perfectly flat. Taking care not to move the roofing out of position as you work, reroll the roofing halfway. Keep the roll fairly tight so that it will roll back neatly. Turn on the gas and light the torch, using a spark igniter. Wear heavy gloves and long sleeves to protect yourself from the heat.

Adjust the torch so it produces a concentrated flame that is mostly blue. Place the propane tank in a central location so that you can work across the roof without having to move the tank during the installation of a sheet. The tank may ice up propane acts like a refrigerant , which will cause the flame to diminish. If this happens lift the tank and lightly heat it with the torch. If you set the nozzle onto the felt while it is still hot, it may melt the felt or set it on fire.

Protect the roof with a rag, set it on a leather work glove, or overhang the nozzle beyond the roof. At all times pay attention to the nozzle when it is flaming or hot. It is possible to start a fire on the roof if you leave a hot or flaming nozzle unattended. Run the tip of the flame along the intersection of the roofing roll and the sheathing; the idea is to lightly melt both the roofing and the felt.

Once you see heat bubbles along the roll's width, use your foot to gently roll the roofing forward. Take your time rolling and heating so that the roofing is heat-adhered at all points. Take special care to produce tight seals at the ends. Often you can use the spark igniter as a tool to gently lift up an end while you apply heat. Align the next sheets so they cover the unfinished top edges. Because the sheets are wide, you usually do not need to worry about precise alignment of each sheet in relation to the ridge.

Torch and roll succeeding sheets the way you did the first sheet. Take special care to fully heat the seam between the sheets. Press with your feet, then a gloved hand, to tighten the seal at the seam between the sheets.

A small amount of melted black sealant should ooze out all along the joint. At a vertical seam or butt joint , fully seal the first piece onto the underlayment. Cut the next piece so it overlaps by 4 to 6 inches. Align the second sheet and torch and roll it toward the first. Complete a vertical seam by pressing with gloved hands, making sure that a small amount of melted black sealant oozes out all along the joint.

If you have a ridge, first install sheets on each side. Position a sheet along a ridge and cut it lengthwise so it will just overlap the seam seal. Torch one side of the ridge, then the other. Take special care to make tight, fully adhered seams.

Cut rake ends flush with the outside edge of the sheathing. You can use a chalkline for this, but it is usually not necessary because the rake will be covered with flashing. Cut a number of strips, about 8 inches wide, to cover the rake flashing. Use a chalkline and tape measure to make precise cuts only if the roof will be highly visible. Torch the pieces onto the flashing and the roofing. Press the strips firmly into place. When you reach the ridge, cut and install a strip that is the same length as the width of the ridge sheet.

If a flat roof meets a sloped roof, be sure to configure the flashings and roofing pieces so water has no opportunity to infiltrate as it flows downward. In some cases this means that flashings will direct water onto the sloped roof. If the old roof worked well, copy its flashing and roofing arrangement. Visualize how water will flow and avoid places where water can puddle or flow under an overlapping roofing piece.

If you have a short parapet wall, you can usually roll the roofing sheets up onto it. The sheets cannot make a tight turn, so there should be flashing or built-up roofing in the corners so the roofing can make a gentle, sweeping turn upward.