How to Shingle Around Metal HVAC Flues

Locate an even area of ground next to the home and set up a ladder so it is sturdy. Climb up onto the roof and walk carefully to the location of the flue that you are installing the shingles around.

Locate the last installed shingle and place another one directly beside of it. Cut the shingle with a utility knife until it fits around the flue pipe. Attach the shingles using roofing nails, placing one at the top left, top center and top right of the shingle using a hammer.

Install additional shingles in the same manner around the flue pipe, cutting them with a utility knife when needed so that they fit the curve of the pipe.

Turn the metal flue flashing upside down and place it over the flue pipe. Trace around the perimeter with a piece of chalk and then lift the flashing up. Apply roofing cement to the perimeter of the area where the lower part of the flashing will sit.

Position the flashing over the pipe and the shingles. Lift up the shingles above the top edge of the flashing and slide the metal edge under it so that the shingles lay on top. Press down on the lower portion of the flashing to adhere it to the underlying roofing cement and singles.

Examine the shingles on the top and sides of the flashing and trim them away additionally as needed so that they lay flat and do not push the metal pipe or flashing up off of the roof.

Secure the flashing to the shingles using roofing nails at either side and at each bottom corner using a hammer.

Apply more roofing cement on top of each nail head to waterproof the holes.