Is sheathing a metal roof necessary? - GreenBuildingAdvisor
2013年2月20日 · You can build a roof without sheathing. Do need to 'rack' the house with sheathing on walls or cross bracing. Attached a solution. Use the reinforced SOLITEX MENTO Plus roof underlayment on top of your rafters. Add purlins on top of this for venting and drainage, then add horizontal purlins to mount the metal roof to.
Installing Rigid Foam Above Roof Sheathing - GreenBuildingAdvisor
2022年7月8日 · A. The answer depends on your framing type and framing thickness. Roof trusses with 2x4 chords will require a different approach from solid sawn rafters. If you have roof trusses, I think that open-cell spray foam is probably your best …
How to Install Rigid Foam on Top of Roof Sheathing
2015年4月3日 · We are having a standing seam metal roof installed. I am planning on installing 2" of xps ridge foam or Gutex Multitherm 60 (R-8.7) on the exterior of the sheathing, then a vapor perm WRB, then furring strips at 45 degrees to attach the metal roof to and allow for drainage of any condensation.
Roof Sheathing Gaps/Bulges - GreenBuildingAdvisor
2024年8月29日 · Roof sheathing will not bow more than 1/2 inch in 2 feet. Deflection of roof trusses is a normal condition that is considered as part of the engineering design of the roof trusses and other manufactured structural roof components. That's about it. If your contractor references anything in their contract, it's probably this.
Sheathing under metal roof - GreenBuildingAdvisor
2014年5月29日 · Lets pretend the roof design details are conventional and so the roof deck sheathing will be 5/8" to 3/4". Many metal roofing dealers specify minimum of 7/16" sheathing. Design depends on type of metal roof: exposed or hidden fasteners; board and batten (pan and ridge) panels; shake and shingle panels; panel or tile system; standing seam; etc.
Proper Insulation Metal Siding & Roof - GreenBuildingAdvisor
2024年2月21日 · Siding is OSB with Tyvek housewrap & then R panel metal exposed fastener siding. Rockwool for exterior insulation & we have 2×6 walls. Roof: hip/standing seam/no exposed fastener with synthetic underlayment & plywood then open cell foam. Manufacturer install instructions for roof say apply directly to sheathing.
Eliminating Condensation on Underside of Metal Roof
2020年12月19日 · I am constructing a post frame conditioned shop building with blow in cellulose on the OSB ceiling. Above this I will have the metal roof on 2×4 purlins. This area is pretty humid. In my small metal storage sheds I had to remove the roof and put a layer of bubble foil insulation to keep condensation from falling onto my tools.
Fastening Metal Roofing to Purlins - GreenBuildingAdvisor
2021年8月29日 · At least around me, for residential, most of the cost of the metal roof is the install, so make sure you have trades lined up and are willing to install over your proposed structure. Since you mention durability, make sure to spec hidden fastener panels, exposed fastener panels usually need screws replaced well before the panel wears out.
Detailing a Metal Roof - GreenBuildingAdvisor
2019年3月29日 · For metal roofing Matt Risenger recommends a solid roof deck covered with impermeable peel and stick membrane. On top of this he suggests two options. One is a layer of plastic fiber mesh about 1/4" thick. This provides a path to exit for any leaks thru the metal roof, but provides little ventilation beneath the metal roofing.
Class A fire-rated standing-seam metal roof assembly for an …
2018年8月29日 · It covers the kitchen bump out and down there the noise is well muted by the nearly 20" thick distance between the metal roof and the interior drywall. Unfortunately, the master bedroom window opens right onto the same metal roof, which means (like last night) all the drippy noises can be very tedious. Not my finest design choice.