How To Cut Holes Around Pipes For Rubber Roof

Cut a hole to match the diameter of the pipe and roll the field sheet around the pipe.

How to cut holes around pipes for rubber roof. Pull off the old rubber roofing from the cut area. Locate the source of the leak on the roof then use a utility knife to slice through the rubber roof around the suspected trouble spot. Compare this measurement to the outside diameter of the pipe or chimney you want to put through the roof. Solid wood cut to shape cut a hole in a circle or square of regular 1x lumber with a hole saw exactly the size of the pipe then cut it in half and attach each side around the pipe also works rodents can chew though wood also but it takes them quite a while and if so you can hear them in time to make a metal patch before they can get in.

Measure the smallest distance across the oval a line parallel to the ridge of the roof. Continue around the mark until the complete cut has been made. For most roofs metal roofing will need to be installed around a vent pipe. It s easy to do once you know how as this video explains.

That gives you a perfect oval about the size of the inside of the pipe or chimney. Make a straight cut from the pipe to the nearest edge of the field sheet. The book mentioned in this video is no longer in print but the essential guide to the steel squ. Check the final position off the sheet.

And then the rest of the roof can be finished up in no time. Fold the membrane back and begin the bonding procedure. With the pipe in a vertical position trace around the pipe using a pencil. We used a small hand saw to remove the old coupling then slid a new pipe extension over the older pipe.

Take a pencil and trace the light on the underside of the roof deck. As you can see in the photo we angled it up using two 45 degree elbows so that our roof hole would be a little higher up the slope of the roof. The penetration will be oval to have a round pipe exit vertically through a pitched roof you need an oval hole in the roof.