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TOPIC: Roof Pitch

What is the lowest roof pitch for metal roofing

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I have a flat roof that I want to put a metal roof ,but I don't want a high pitch roof. I'm afraid of the hurricane winds that we have here in Florida.
Guest User

10/11/2004
There are mechanically seamed vertical metal roofs which can be used as low as a 1/4:12 pitch. It is all a matter of finding the right metal roof for that pitch. Generally, these low pitch products are used on commercial an d industrial buildings
Guest User

10/12/2004
I have a gabled roof with a 1.75/12 pitch slope. What specific roof types can be put on? Also, It is currently a BUG roof. I will tear it off down to the 1x8 pine decking. What then is the best dry-in? Does using a SA self adhesive rolled roofing allow any other style metal roofs to qualify to be put on with this very low slope? Thanks. Eric
Guest User

12/19/2004
A number of things to consider. First is whether it is residential or commercial as they have separate requirements in the building code. Assuming it is residential and that it is a vaulted ceiling, then you need to provide a minimum of 1" of vented air space in the US and 1 1/2" in Canada. This means you need to select a system that stands off the deck. As well the building code calls for a moisture barrier underlayment and yes putting down a self sealing ice and ater shield allows a broader range of metal roof systems to be installed. Then there is the configuration of the roof. Does it have long rafters or a steep roof above feeding it with a lot of runoff and snow etc. Select a product from one of our member manufacturers and check with their technical. Also ask for their product approval report which will indicate that it has been tested and approved for that type of installation.
Allan Reid
Dura-Loc Roofing Systems, Inc.

12/20/2004
By putting an ice and water shield under an entire roofing system on a home, could that prevent moisture from escaping there for causing some moisture related problems down the road. Also, could useing stroyfoam insulation under a metal roof sytem prevent some heat tranfer into the house. What comes to mind is a stryofoam cup holding a very hot liquid.
Guest User

12/20/2004
I have a roofing question on a new commerical building. The roof design proposal is: friction lock metal standing seam, fastened to 6" of foil faced poly iso, attached to open web joists with 48" spacing. Roof slope 1 in 12 - shed style - roof span 60' - 70' No structural sheeting or bracing has been proposed. What are the possible pit falls of a roof design as described above?
Guest User

12/20/2004
Some metal roof systems can be installed over insulation. Not all systems can be though. However, in normal residential construction, with a ventilated attic, insulation must be down on top of the ceilings. The roof is not the place to put it. I am not sure I understand your querstion about ice and watershield. However, such underlayments can help to enhance the protection offered by any roof system. Keep in mind, though, that these products do not breathe at all, even heightening the importance of good attic ventilation.
Guest User

12/20/2004
It's all a mater of finding a metal roof which has been designed for this sort of application. Right off hand, this sounds reasonable unless I am missing something. But, againm, the metal panels you use MUST be designed and fabricated by their manufacturer for this type of application.
Guest User

12/20/2004