Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Roofing/Siding

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 10-25-2012, 07:04 PM   #1
Member
 
PPBART's Avatar
 
Join Date: Nov 2011
Location: Louisiana
Posts: 52
Share |
Default

Screws for Corrugated Metal Roofing


I'm going to be replacing the corrugated metal roofing on my workshop as soon as the material comes in. Will be using standard 26" wide corrugated (~2.5" waves). Question is placement of the screws -- original roofing was nailed with nails in the peaks of the corrugations, but I've been told the fasteners (I'll be using screw) should go in the valleys, closer to the framing and tighter. So do I put the screws in the valleys or on the peaks?

PPBART is offline   Reply With Quote
Old 10-25-2012, 07:13 PM   #2
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 25,587
Default

Screws for Corrugated Metal Roofing


Only the high spots, 20 screws per panel on a 10' panel.

joecaption is online now   Reply With Quote
Old 10-25-2012, 07:21 PM   #3
Member
 
funfool's Avatar
 
Join Date: Oct 2012
Location: Albuquerque NM
Posts: 700
Default

Screws for Corrugated Metal Roofing


The valley. I suggest you look at the manufacturer recommendations for installing.
I know, I hate reading the manual also.
Will be screws with rubber washers you install it with.
Main concern is flat framing in proper location to screw it to and spacing of the screws, and how far apart you need to run stringers to screw to.

If you remove the old metal roofing and find it was installed over osb sheathing, is no problem, just install new metal and screw it down as suggested in the instructions.

But nailing through the ribs is a home owner diy that thought he knew what he was doing. He was wrong.
__________________
If it was easy, we would not call it work!
funfool is offline   Reply With Quote
Old 10-26-2012, 07:45 AM   #4
Member
 
PPBART's Avatar
 
Join Date: Nov 2011
Location: Louisiana
Posts: 52
Default

Screws for Corrugated Metal Roofing


Quote:
Originally Posted by funfool View Post
...installed over osb sheathing, is no problem, just install new metal and screw it down as suggested in the instructions...
No sheathing, just 1x6's on ~2' centers across rafters.
PPBART is offline   Reply With Quote
Old 10-26-2012, 08:34 AM   #5
Member
 
Join Date: Nov 2011
Location: Hartfield VA
Posts: 25,587
Default

Screws for Corrugated Metal Roofing


I went on three differant manufactures web sites that make corrigated roofing and looked at there install directions.
All suggested fastening on the high spots not the valley.
joecaption is online now   Reply With Quote
Old 10-26-2012, 12:58 PM   #6
Member
 
PPBART's Avatar
 
Join Date: Nov 2011
Location: Louisiana
Posts: 52
Default

Screws for Corrugated Metal Roofing


Here's a link to instructions from Union Corrugating Company:

http://www.unioncorrugating.com/docu...stallation.pdf

See figure 1 -- puts screws in valleys at eave, on ridges for intermediate fasteners(!)
PPBART is offline   Reply With Quote
Old 10-26-2012, 01:27 PM   #7
Newbie
 
Join Date: Oct 2012
Posts: 1
Default

Screws for Corrugated Metal Roofing


[I'm going to be replacing the corrugated metal roofing on my workshop as soon as the material comes in. Will be using standard 26" wide corrugated (~2.5" waves). Question is placement of the screws -- original roofing was nailed with nails in the peaks of the corrugations, but I've been told the fasteners (I'll be using screw) should go in the valleys, closer to the framing and tighter. So do I put the screws in the valleys or on the peaks?[/quote]

Go into the peaks and use longer screws with rubber washers. The washers won't last very long but are better than not using anything. And don't over tighten. Peaks over valleys because you should try to keep the fasteners away from water. Where's more water? In the valleys. Plan on going back up every couple years to re-screw down the screws due to the metal expanding and contracting. That natural effect of heating and cooling will eventually work the screws loose.
augie1684 is offline   Reply With Quote
Old 10-26-2012, 01:41 PM   #8
Member
 
funfool's Avatar
 
Join Date: Oct 2012
Location: Albuquerque NM
Posts: 700
Default

Screws for Corrugated Metal Roofing


All the metal roofing I have installed is coloured roofing on homes, it has flat spots in the valley and perfect place to fasten it.
And I use 2 length of screws while installing it. Longer screws in the valley to fasten it to the framing, while short screws where the ridge over laps.
In a 3' wide piece, will be 3 screws in the valley holding it tight to the framing, the short screw on the overlap, I do not want to reach the framing, just tie the two pieces of metal together. So the wind can catch the lip.

My concern with screwing it on the peaks, I am using a 18 volt makita screw gun, Going to take a real light trigger finger to snug the screws with out sucking down and distorting the shape of the metal. I want to screw it to the framing in the places the metal sits flat on the framing. So short screws for the overlap, do not want to reach the framing.

Your real concern on a metal roof is the flashing. will be some that gets installed before the roof panels go down, some after.
Depending on your roof, as to what flashing you need, not uncommon to need 4 different styles of flashing, sometimes will need to have some made up to work for that job.
Just thinking, no sense in over thinking the screw pattern, your manufacturer will tell you. The key to a metal roof that does not leak is the flashing.
All of this depends on the finished look you want.
A $300k home, it needs to look nice, A chicken coop in the back yard, a little more flexibility.
__________________
If it was easy, we would not call it work!
funfool is offline   Reply With Quote
Old 10-26-2012, 06:38 PM   #9
Pro
 
Join Date: Feb 2012
Location: Memphis, TN
Posts: 34
Default

Screws for Corrugated Metal Roofing


R-panel roofing is screwed in the flat (valley) area. If you screw through the peak, it's got nothing backing it up, so the metal will flex. I'd screw it down into the rafters.

With the screws to fasten two panels together, you're not going to compress the peak since you're only screwing the two panels together.
smalpierre is offline   Reply With Quote
Old 04-08-2014, 03:11 PM   #10
Newbie
 
Join Date: Apr 2014
Posts: 8
Default

Screws for Corrugated Metal Roofing


Funfool is right - follow the manufacturer's guidelines if you are at all concerned with performance or warranty coverage. Nailing the metal panels on the peaks will distort/ bend the metal around the screw. Even if you manage to attach the panels without any kind of distortion, the next windy day you have, you may start seeing warpage around the peaks and screws.
lawrence.crush is offline   Reply With Quote
Old 04-08-2014, 06:28 PM   #11
Member
 
Join Date: Jan 2012
Location: LI, NY
Posts: 112
Default

Screws for Corrugated Metal Roofing


If you want a warranty the only thing that matters is the manufacturer installation requirements. If you don't care about that then do what you feel like. Fastening through the ridges is better for keeping water out but harder to keep the metal from distorting. Fastening through the valleys is worse for water but looks prettier.

eclark is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Lathe metal roofing? Stan ETenn Roofing/Siding 19 06-18-2013 06:48 PM
Drywall nail types kevsprojects Drywall & Plaster 23 07-31-2011 07:34 PM
Meridian Metal Roofing Arky217 Roofing/Siding 1 12-07-2010 05:33 PM
Loose sheet metal screws harrysanders Building & Construction 4 05-30-2010 08:16 PM
Best way to seal new Chimney through Metal Roofing tuchodi Roofing/Siding 5 03-01-2010 09:45 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.