How To Cut Hole In Roof For Stove Pipe

Cut and use template to mark and cut sheet to fit pipe at angle.

How to cut hole in roof for stove pipe.

The problem is that a 3 inch round pipe needs an oval hole in a sloped roof. Cutting any size hole in a roof is bad enough. A double wall pipe needs a 12 inch clearance space. There is an easy trick for drawing out the hole.

Place the chimney where it would be related to the stove and mark the center of the chimney on the ceiling. You will need to cut the opening to the roof to extend the chimney pipe. Select angle increment and hit full set to generate and print a full set of oval templates for currently entered pipe diameter. Building code requirements state the opening had to be larger 1 or 2 than the pipe on all sides.

A single wall pipe will require 18 inch clearance to the ceiling while double wall pipe needs an 8 inch clearance to the ceiling. Then shine a bright flashlight through the pipe from the. 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.

Hold the pipe in place and run it up close to the roof decking. Now that the hole was cut my friend ran back down the ladder and up into the attic so that we could connect the vent pipe through the roof. Nobody wants a leaky roof or the damage it could cause to yo. When calculating your chimney pipe size subtract 1 5 inches for each joint overlap.

So this ended up being a rather large hole especially when compared to the smaller diameter of the single wall pipe. The hole needs to be taller than your pipe diameter as the pipe isn t passing through the roof at a perpendicular angle. 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.