Corrugated Metal Siding Window Sealing

 
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Old 09-19-2012, 06:50 PM   #1
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Corrugated Metal Siding Window Sealing


I cant find any definitive info in manufacturer specs with these specific windows. I have 2 pole barns to side with vertical corrugated metal and have to install roughly 10 windows. The windows have flanges and I must cut the J-channel. My question is this. Has anyone done this installation before? If so, what is the best way to water seal around the window? I know how to install windows & trim with vinyl siding , unfortunately this method will not work and will surely leak with the vertical corrugated metal. Im thinking of mabey bending a drip cap that protrudes 1/2 in past each side of the window and just kerfing the siding to accept it? Is this the proper way? If not let me know. Here is a pic I found on google of the siding type im using. Any input would be appreciated. Thanks guys.

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Old 09-19-2012, 07:27 PM   #2
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Re: Corrugated Metal Siding Window Sealing


I don't get why you have a problem.
How are you handling siding against a man door. Should be basically same detail shouldn't it?

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Old 09-19-2012, 07:33 PM   #3
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Re: Corrugated Metal Siding Window Sealing


I can't understand why you can't J around the windows?
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Old 09-19-2012, 09:49 PM   #4
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Re: Corrugated Metal Siding Window Sealing


Because the water that will run down the J will run right behind the siding and into the building.
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Old 09-19-2012, 10:01 PM   #5
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Re: Corrugated Metal Siding Window Sealing


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Originally Posted by livingsoulsdie View Post
Because the water that will run down the J will run right behind the siding and into the building.
That's how it's done. Top first, then sides, then bottom. They don't leak like you think they would.
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Old 09-19-2012, 10:40 PM   #6
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Re: Corrugated Metal Siding Window Sealing


That's the same way vinyl works.
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Old 09-19-2012, 10:56 PM   #7
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Re: Corrugated Metal Siding Window Sealing


Ask the metal siding providing if they have any details.
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Old 09-19-2012, 11:19 PM   #8
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Re: Corrugated Metal Siding Window Sealing


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That's how it's done. Top first, then sides, then bottom. They don't leak like you think they would.
I think you got that one backwards. bottom first, then sides, then top. Same as flashing a chimney or most any other water shedding system.

OP: you're probably not going to be making that J with a 4' brake unless the windows are tiny. You probably will have to make your own or farm it out to a metal guy.
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Old 09-20-2012, 05:09 AM   #9
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Re: Corrugated Metal Siding Window Sealing


windows should be water tight before any siding or trim gets on the building,don't use j at the window head,cap over the head and side j with a Z drip cap then j above that to close off the bottom of the panel
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Old 09-20-2012, 05:12 AM   #10
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Re: Corrugated Metal Siding Window Sealing


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Originally Posted by Tom Struble
windows should be water tight before any siding or trim gets on the building
I wish more people understood that. I am so tired of people and their the siding is water proof ir their the tile makes it waterproof, and my favorite; shingles never leak, you dont need tar paper.
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Old 09-20-2012, 05:21 AM   #11
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Re: Corrugated Metal Siding Window Sealing


well to be fair there's probably no sheathing or conventional drainage plane behind the metal?
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Old 09-20-2012, 05:36 AM   #12
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Re: Corrugated Metal Siding Window Sealing


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well to be fair there's probably no sheathing or conventional drainage plane behind the metal?
Exactly. There are just wall girts holding the window.
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Old 09-20-2012, 05:37 AM   #13
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Re: Corrugated Metal Siding Window Sealing


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That's how it's done. Top first, then sides, then bottom. They don't leak like you think they would.
Im not going to even comment on this one.
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Old 09-20-2012, 05:41 AM   #14
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Re: Corrugated Metal Siding Window Sealing


Ohh btw. They do leak if you do it the conventional way. I have seen experienced siders make this mistake with corrugated metal & I dont want to make there mistake. Please leave the BS comments on someone elses post.
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Old 09-20-2012, 07:09 PM   #15
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Re: Corrugated Metal Siding Window Sealing


maybe use sheet stock under and around the unit to create a drainage plane?i think metal would be more durable if the inside is not going to be finished,you could put a bend at the sides to keep water from blowing past sideways?...follow my drift?
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Old 09-20-2012, 07:11 PM   #16
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Re: Corrugated Metal Siding Window Sealing


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Originally Posted by smalpierre View Post

OP: you're probably not going to be making that J with a 4' brake unless the windows are tiny. You probably will have to make your own or farm it out to a metal guy.
you can buy it
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Old 09-20-2012, 07:29 PM   #17
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Re: Corrugated Metal Siding Window Sealing


duh..i just reread your post and realized your just replacing the windows

either way i don't see how you can without dismantling the siding and j trims from around the existing unit
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Old 09-20-2012, 07:59 PM   #18
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Re: Corrugated Metal Siding Window Sealing


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Originally Posted by Tom Struble View Post
maybe use sheet stock under and around the unit to create a drainage plane?i think metal would be more durable if the inside is not going to be finished,you could put a bend at the sides to keep water from blowing past sideways?...follow my drift?


It still seems like the drip cap is winning out to prevent the majority of water flow to the sides J's. After looking at the specs on the document you sent me it is just looking as if the cap is the only defense against the water running down the channel and behind the siding. As for a drainage plain since the wall girts or purlins (if thats what you want to call them) are 2' OC's I think I will run ice & water shield from the top of the window all the way to the bottom of the siding. Install the window with flange on top of the Ice & water & silicone the backs of the siding when installing. Think it will work?

Last edited by livingsoulsdie; 09-20-2012 at 08:05 PM.
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Old 09-20-2012, 09:43 PM   #19
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Re: Corrugated Metal Siding Window Sealing


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Originally Posted by smalpierre View Post
I think you got that one backwards. bottom first, then sides, then top. Same as flashing a chimney or most any other water shedding system.

OP: you're probably not going to be making that J with a 4' brake unless the windows are tiny. You probably will have to make your own or farm it out to a metal guy.
Well yeah, but we put the top up first, then the sides, then the bottom, so as to be able to butt into the previous piece. Then the tabs are bent over.
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Old 09-20-2012, 10:03 PM   #20
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Re: Corrugated Metal Siding Window Sealing


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Originally Posted by livingsoulsdie View Post
It still seems like the drip cap is winning out to prevent the majority of water flow to the sides J's. After looking at the specs on the document you sent me it is just looking as if the cap is the only defense against the water running down the channel and behind the siding. As for a drainage plain since the wall girts or purlins (if thats what you want to call them) are 2' OC's I think I will run ice & water shield from the top of the window all the way to the bottom of the siding. Install the window with flange on top of the Ice & water & silicone the backs of the siding when installing. Think it will work?
So I don't know much about this kinda stuff. The architect on our last job spent two hours photographing and sketching our work so as the drafters would know how it should be done.

We don't get huge amounts of rain, but have never had any problems doing it as stated. I've never seen it done any other way. Steel and vinyl siding are done this way to.

Only thing to keep in mind for however you do it is being able to get the pieces in. First one is easy, getting the second one in the J and lapped not so much.

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