Question for those who have installed...

[Eggsoteric]

Ondura roofing on their coops.

I'm currently rehabbing a coop I got off of CL. I should have everything ready to place in the yard by this coming Sunday/Monday, however, I'm waiting until it's placed in the yard before I put the roofing on. I picked up 2 panels of Ondura roofing (one panel wasn't enough to cover). I have the following questions:

I've viewed the directions online re nailing the roofing down. Ondura suggests the following:

Drive Nails Correctly.
CAUTION: Use only genuine Ondura nails for installing sheets and tiles (tiles at eave and ridge only) (See Fig. 6). Other types of nails may not provide sufficient hold-down strength. Drive Ondura nails only through the top of corrugations. And drive perpendicular into purlins…not at an angle, so the rubber washer is snugly in contact with the sheet (See Fig. 5). Don’t overdrive or under-drive nails. Slight hand pressure on a nailed down corrugation should not separate sheet from washer contact.​

I've seen pictures of the roofing nailed down both ways (thru the crown of the corrugation and also on the flat areas of the corrugation). Does it matter what way it's nailed down? I live in an area that can get fairly windy so, I'd like for the roof to stay on.

Also, I know you're only supposed to overlap the second panel over one or two corrugations, but, would it be okay to use the full 2 sheets and overlap as needed? Would too much overlappage cause a problem? How much of an overhang on the front/back would be acceptable? Thanks!

For reference, here's a pic. of the coop I'm rehabbing:

 

[featherfooted]

I can't answer all your questions, but I can answer the one about nailing in the ridges and valleys of either ondura or metal roofing. If you nail in the valleys it WILL leak. Maybe not at first, but it will leak. That is why there are ridges. The rain doesn't stay on the ridges long enough to leak. We have had this problem at the barn I board at as who ever put the roofing on nail in the valleys and it leaks very badly. We have not been able to fix the problem no matter what has been tried. I'm going to use Ondura on the coop I'm building right now and if you put it up as they say it should withstand the wind.

 

[J-Sanders]

Overlapping by more than one or two corrugations is not a problem. Nailing in the trough is a problem and will likely be the cause for purlin deterioration and leaking into the coop when the washer goes bad.

Me, I start the nail and before I finish it off I put a dab of silicone roof sealant around the nail and drive the washer into it so that I get a tight seal with longer life than just the rubber washer alone.

If I am correct in my memory the over hang can be as much as 6 inches and still retain the high wind rating. Ondura states that you must nail on the ridge but they don't specify how many nails you can put along the ridge. I would suspect that using an extra purlin at the front and back edge will not be a no no.

Jim

 

[Eggsoteric]

Thank you both. Jim, stupid question, the dab of silicone around the nail is that just below the nail head and before the washer or after the washer between the washer and the roofing?. Thanks!

 

[Ole rooster]

I wouldn't nail it. I would only use roofing screws with the rubber coated washer. Lowes or Home Depot has um. Screw down through the lower corrugation and you'll be fine. The roof on my home and chicken coops are done that way with no problems.

 

[J-Sanders]

Thank you both. Jim, stupid question, the dab of silicone around the nail is that just below the nail head and before the washer or after the washer between the washer and the roofing?. Thanks!

The silicone goes between the roofing and the rubber washer. It will squeeze down into the hole and provide a very good mechanical seal that will outlast the washer.

The suggestion to use washer screws is good as long as you don't use drill tip types (use the type that has the very sharp tip with the screw thread all the way to the tip)


and don't put them in the valleys as the will catch water and debris and cause deterioration of the purlin.

Jim

 

[Robotmomma]

I have a question about this Ondura stuff. I decided to use a 1x3 for the purlins and the three inch nail they sell for it is way too long. About an inch will stick through the bottom. Should I find another type to use? Or is there something I could use to cut the tip of the nail sticking out? I need something about 2inches max . Did anyone use something besides the ondura nails with success? eek