New construction for metal roof

Guest User
9/14/2003
After researching the better part of 2 years, I will begin construction of my “retirement” house next year. I want this house to basically outlast me, so I have selected items that offer long term returns and durability. Cost is a consideration but if I can realize a return on investment with increased performance, I have chosen the higher end. However, as I start the planning phase, talking to builders and contractors, I find myself at a crossroads in in terms of roof construction, energy efficiency and metal roof requirements. Basically I’m getting conflicting advice. Some people say I can’t do all the items listed below for varying reasons – but offer no comprimises or explanations. I have discussed these items with my architect which he said have been done in some case studies by universities to make homes more efficient.. Any thoughts? Any assistance will be greatly appreciated House: located in south LA, 2400 sqft living – 3000 sqft under roof, single floor, slab, standard stick construction, gable roof (7/12) and brick exterior. 1) Roof sheathing will be ½” plywood, screwed and nailed with taped seems (hurricane issue) 2) Interior side of roof sheathing will be isulated with icyene foam or foam panels to create “conditioned” attic area for HVAC mechanicals 3) Vapor barrier will be 30lb felt on exterior side (other recommendations?) 4) Metal roof will be a “standing seam” style with interloc clips. Color of roof will be a light gray 5) Metal roof will be installed per mfg’s instructions and meet hurricane uplift requirements
Todd Miller
Classic Products, Inc.
9/16/2003
I am a little unsure of your exact plans pertaining to attic ventilation. You need to have some method of making sure that excessive moisture does not build up in the attic which would then condense in your outer roof sheathing. Provided the attic is vented, I think your strategy here is good.
Guest User
5/7/2004
I'm also building my own house with metal roof, but the issue in this case is the ventilation. With the use of Isonene there is no need for ventilation because that is applied directly under the sheathing and will sealed the whole attic. I worked in design for an Architectural Firm in Orlando and we specified that product all the time and is very popular with builders in this area.
Todd Miller
Classic Products, Inc.
5/7/2004
We are seeing more and more construction done that way. The end result is a sealed attic which will not have moisture problems.
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