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raised roof panel installation

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http://boards.diynetwork.com/eve/forums/a/tpc/f/9221916776/m/3533963177

Jun 15, 2013, 11:20 PM
jimbo4dog
raised roof panel installation
polycarbonate corrugated roof panels,,when installing mounting screews do they go on the low side or the high side when attaching roof
Jun 16, 2013, 08:17 AM
Sparky617
quote:
Originally posted by jimbo4dog:
polycarbonate corrugated roof panels,,when installing mounting screews do they go on the low side or the high side when attaching roof


I believe they go on the high side. Otherwise you're putting a hole where the water runs.


General Disclaimer

Any advice given here is general in nature and is not necessarily valid for your given area. If in doubt check with your local codes enforcement department for what is required when doing electrical, plumbing or structural work on your house. Permits may or may not be required in your area and home owners may not be able to DIY some tasks. I have no way of knowing if you have the skills needed to complete the tasks you are asking about, when in doubt seek professional assistance.

My advice may be worth exactly what you pay me for it. :-) For the record I did not stay in a Holiday Inn Express last night.
Jun 16, 2013, 09:09 AM
jimbo4dog
thanks for the quick reply sparky, i see it the sme way that it should be on the high side have a nice day
Jun 16, 2013, 09:11 AM
Jaybee
Actually, no - they go on the low side.

Roofing screws for plasitc or metal roof panels have a rubber seal washer backed up by a cup-shaped soft metal washer - all connected to a hex-head screw. When the screw is driven in the rubber washer is compressed and contained by the soft metal washer, making a permanent seal around the screw hole. In order to work, this requires that the roof panel is sitting tight against the sub-roof decking or lath strips - making for a tight connection of screw and washers through the roof panel.

If you put the screw through the high side of the panel without something solid directly underneath the screw, then the panel can expand and contract causing flex that will break the washer seal. It may seem counter intuitive, but the screws need to go on the low side to work.


Jaybee
Jun 16, 2013, 09:59 AM
Sparky617
Thanks Jaybee.

I've seen corrugated supports that go under the panels and thought that is why you used to prevent crushing the panel.

That said, I've never used the panels.


General Disclaimer

Any advice given here is general in nature and is not necessarily valid for your given area. If in doubt check with your local codes enforcement department for what is required when doing electrical, plumbing or structural work on your house. Permits may or may not be required in your area and home owners may not be able to DIY some tasks. I have no way of knowing if you have the skills needed to complete the tasks you are asking about, when in doubt seek professional assistance.

My advice may be worth exactly what you pay me for it. :-) For the record I did not stay in a Holiday Inn Express last night.
Jun 16, 2013, 11:58 AM
Jaybee
The whole key is having something solid to screw into underneath wherever the screw is located. If you had a corrugated solid support as structure under the panel and as long as it matched the profile of the panel, then you could install the screws on the high side. However, since most such panels are installed on top of flat slats, it's designed to work on the low, flat parts where it gets full contact.


Jaybee
Jun 16, 2013, 05:55 PM
jimbo4dog
thanks for the input jaybee and sparky, just so you know a friend of mine stopped over and my wife ratted me out to him that i was doing the roof and he told me the same thing that you said jaybee, so this afternoon he did it all for me like it was nothing.. and he installed all screws on low side and only on high side to keep the seams together with a strip of wood for support underneath,, next time i do something like this i know who to call.. thanks again guys