Metal Roof guage

supton · 04-13-2010, 08:05 PM

I've been flipping through previous posts; I see recommendations to use 26g. I just got a quote to use Fabral Grandrib 3, which is only 29g. Seems thin, but I'm not a roofer. We don't have hail here, or rather very infrequently. Is 29g ok, or is that too thin to bother? I'd like metal, but I hate doing things twice.

AaronB · 04-13-2010, 08:14 PM

I would have no issue with that as long as it is over a solid substrate.

supton · 04-13-2010, 08:44 PM

What would count as solid substrate? I think I have 1x6's for roof planking. The guy wants to only pull off the first few feet of shingles, to make sure the edges are fine (I have had ice damming issues), but put down a "titanium" underlayment over the rest of the shingles. My neighbor thinks I should strip the roof instead, which I kinda lean towards.

Oh, and thanks for the quick response.

AaronB · 04-13-2010, 09:04 PM

It's always better to tear off before you replace.

1x6 is fine as long as its not spaced more than 1/4 apart. Sometimes we run into skip sheathing, in which the deck planks are spaced a few inches apart in order to accommodate a solid roof covering.

huck · 04-13-2010, 09:34 PM

Quote:

Originally Posted by supton

I've been flipping through previous posts; I see recommendations to use 26g. I just got a quote to use Fabral Grandrib 3, which is only 29g. Seems thin, but I'm not a roofer. We don't have hail here, or rather very infrequently. Is 29g ok, or is that too thin to bother? I'd like metal, but I hate doing things twice.

I have 29 ga on my house. been there for 10 years , still looks as good as it did when installed.
i have installed many roofs with 29 ga never had an issue.

supton · 04-13-2010, 09:58 PM

From what I can see, it is quarter-inch or less, on at least one roof which I can see under. But I haven't looked at the edges, to see what is there.

Ok, I hear you on the stripping, it seems wise to me too. The contractor seemed to think stripping was expensive (what isn't?) and not necessary, but no matter what route I go, it seems like stripping is a good idea (if I shingle, put down snow and ice shield).