Corrigated tin roofing edge overlap

37chief · Jul 21, 2014

I have a question installing corrugated tin roofing. What is the correct over lap of the tin panels? Thanks Stan

jennifer408 · Jul 21, 2014

i put it on a horse shed once and to get a 2' span out of it you can only give it one lap. if i was gonna do my house i would do at least 2 laps, i could see daylight through 1 lap and i screwed it down 8 ways to sunday.

JMOR · Jul 21, 2014

(quoted from post at 02:00:41 07/21/14) i put it on a horse shed once and to get a 2' span out of it you can only give it one lap. if i was gonna do my house i would do at least 2 laps, i could see daylight through 1 lap and i screwed it down 8 ways to sunday.

f I recall, you can get something like an overlap & a half by flipping the sheet next to the first upside down & then alternating every other sheet. Sheets will be over/under/over/under/etc. Compare.

IaGary · Jul 21, 2014

In this area I have always seen it lapped two ribs, if that is what you are asking.

On the ends it is lapped anywhere from 4 inches to 2 feet.

Gary

Zachary Hoyt · Jul 21, 2014

What we have around here is sheets about 38" wide with 5 ribs, they are overlapped on the one rib at the edge and this gives a working width for each sheet of 36". One edge has more of a lip on it than the other and that one goes on the edge for the first sheet, then you overlap the edge with less of a lip on top of the edge with more for the rest of the roof. This way it lies pretty flat. I have never used the kind that is continuously corrugated but I would think it would be harder to get it to seal up tight.
Zach

D beatty · Jul 21, 2014

Most manufacturers will give you specifications for best results of product.

cannonball · Jul 21, 2014

which one the 24 in or wider....my dad said to strong barn the 24...one down 2 up...in other words you start one up and the next one under...lay 3 together and you will see how they fit...

FBH44 · Jul 21, 2014

One edge of roofing will have a long edge, the other will be short. Do not NOT install the long edge over the other sheet, and stick it down into the valley. It WILL siphon water back up and over into the barn.
Install it so the short edge overlaps over the first sheet, and does not run down into the valley.

Jiles · Jul 21, 2014

I had this same question several years ago. I ended up lapping the sides 1&1/2 laps. and the ends lapped at 6".
I might add that when I was installing the first overlap, a neighbor came over and made the suggestion to caulk the seam.
Since he had built several metal roof buildings, I took his advise and used silicone caulk on all the other seams on this 30 x 60 roof.
Un-caulked seam was the only place I had a leak.
He also stated that he would only use 5v roofing without the expense of caulking, for any other roof.

Corrigated tin roofing edge overlap

37chief

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jennifer408

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JMOR

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IaGary

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Zachary Hoyt

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D beatty

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cannonball

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FBH44

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Jiles

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