How To Cut Hole In Roof For Stove Pipe

When plumbing pipes and chimneys have to go through sloped roofs they are always cut fairly large just to make sure that the pipe will pass through.

How to cut hole in roof for stove pipe.

Place the chimney where it would be related to the stove and mark the center of the chimney on the ceiling. A double wall pipe needs a 12 inch clearance space. Cutting any size hole in a roof is bad enough. There is an easy trick for drawing out the hole.

Then shine a bright flashlight through the pipe from the. Building code requirements state the opening had to be larger 1 or 2 than the pipe on all sides. When calculating your chimney pipe size subtract 1 5 inches for each joint overlap. To find pipe end shape not hole in sheet enter 0 for sheet thick.

When installing a chimney for a wood stove on a metal roof you ll first need to assess the position. So this ended up being a rather large hole especially when compared to the smaller diameter of the single wall pipe. The problem is that a 3 inch round pipe needs an oval hole in a sloped roof. This is the double wall pipe so it is thicker than the interior single wall pipe.

Hold the pipe in place and run it up close to the roof decking. A single wall pipe will require 18 inch clearance to the ceiling while double wall pipe needs an 8 inch clearance to the ceiling. Drill a small hole in this spot to mark the chimney s center. Select angle increment and hit full set to generate and print a full set of oval templates for currently entered pipe diameter.

The roof flashing may be the hardest part to installing a chimney pipe for a wood burning stove. You will need to cut the opening to the roof to extend the chimney pipe. The hole needs to be taller than your pipe diameter as the pipe isn t passing through the roof at a perpendicular angle.