Roof Leaks: How to Make Flashing Repair
LESLIE: Bob in Oregon is on the line with a roofing question. What’s going on?
BOB: Well, I had some people saw – and add a roof over a deck on a house, making the deck into a porch. And they – when they nailed the new ledger onto the old soffit, I had told them to get up underneath the existing shingles with flashing, to go over top of the new roofing and so forth so the water continuation – the drainage. And they didn’t do that. I’ve found out since then that there’s probably a reason why they didn’t and that is because the old roofing on the house is very, very well nailed down – about on 2-inch centers – and plying out all those nails would be a problem.
And so they just put the new roofing up against – as close as they could over top of the new ledger. But it doesn’t – of course, it doesn’t seal. So the water comes down the old roofing and then runs down between the two and down onto the deck – down onto the porch. And I heard you talking about a product that you were giving away, whether you were going to have a joined floor or whatever. And I said, “Hey, that sounds like exactly what I might need: a liquid rubber.”
TOM: Yeah, you’re talking about the Ames’ Blue Max, which is a great product. But it’s not designed to patch a roof installation that was just done horribly wrong to begin with.
And so, my advice on this would be to fix it once, fix it right and not have to deal with it again, by making the proper roof flashing repair which, in your case, is going to involve pulling some of the roof material off of the house so that you can take the roof from the overhang – the new overhang now – and work it up under those shingles properly.
BOB: That’s what I’m trying to avoid, if I can, because, of course, the edge of the existing roof is tarred down pretty well. In fact, real well, because I did that myself a few years ago.
BOB: And it’s nailed down very, very well.
TOM: I understand that. But anything else is not going to be a permanent repair. And I really feel like removing that roof is the right way to go here so that you have a properly flashed seam. And it’s going to be important to keep that dry, it’s going to prevent rot if the water leaks through there and it’s going to add to your home value, because it’ll be properly done.