Evening, all,
I have a friend who is tearing down the brick chimney on his house, in preparation for knocking out a wall and doing some pretty major interior reno work. The chimney was for an old oil furnace that has long since been replaced, and the new furnace is direct-vent, so the chimney is not used.
The chimney exits the house through the middle of a 12/12 roof (or something very close), and the roof has three layers of asphalt shingles. So my friend (and I call him that because he hasn’t yet gotten me involved) now has a chimney-sized hole in his roof that is covered only by a piece of sheathing and a tarp.
It wasn’t until he had the chimney torn down into the attic that he realized he would now have to patch a three-layer roof. What is typically done in this situation? Do you build up a three-layer patch? Add sheathing to make up the thickness difference and then put one layer over?
Thanks
Replies
I would do a 3 layer patch. Keep the patched roof deck at the same elevation as the existing stuff.
Makes it easier for the eventual replacement.
Time to reroof! Seriously, if it has three roofs on it time to take some weight of the trusses. Do it once. do it right! If you can find a roofer who will warranty a 3 layer patch, ask for his insurance and his next address. :o
agreed that a complete tear-off would be optimal, but I don't think it's in the cards (or the budget!) :-)
He was supposed to have a roofer come look at it Sunday night or yesterday, so we'll see what his opinion is. Whatever it is better be done soon, because we're supposed to get rain for the next week...
I'd just do a three layer patch. The warranty isnt going to do you much good anyhow seeings how it has three layers and needs to be replaced sometimes sooner rather then later.
I've torn off a lot of three layer roofs that were keeping the water out and were not in any danger of colapsing from the weight.
Obviously the roof is carrying a lot of excess weight but hell, who isnt!
Doug