I did something like this years ago. I made the hole in the plywood
about 4 or 5 inches bigger all around than the stovepipe. I stapled wire
lathe to fill the gap and then applied cement (concrete) on both sides --
I used a very rich mixture. It held up for more than 5 years before I
sold the place and never had a problem.
On Mon, 23 Oct 2000 email@example.com wrote:
> While doing the glass block in the shop, I have a window that vents a oil
> burning furnace. The 8" stove pipe come out this window. I glass blocked
> around it and framed out a "hole" in the glass block with 2X4's. (The
> opening is 9" X 21")
> I wanted to put 3/4" plywood to cover the space.
> My question is, what is the best way to close the space by the stove pipe?
> How far away from a stove pipe do I need to keep the wood?
> What can I put in-between the wood and stove pipe?