I don't believe that the weight of plywood or OSB will likely be a problem, but if you are worried about the extra weight, you could always check with an engineer.
Thanks again. The roofer agrees that 2x4 framing to boost the peak about the vented attic could well be a workable Option to match up the roof strains.
If the climate is not far too serious It can be most likely okay to get just the R-ten foam over the structural metal, although there's some possibility which the metal could sweat in cold weather conditions. I'm assuming Additionally you meant to insulate the 2x12 joist bays to get your total R-worth to an inexpensive degree.
We want to insert keep track of lights to The brand new ceiling, with its electrical provide functioning through the new cavity established with the insulation. The prevailing enthusiast also demands its electrical source to operate through that Room.
I am a tiny bit stumped on this 1 - I'd want to vent this roof assembly, but I can't say irrespective of whether there will become a organic convective circulation as there could well be with rafters sloping Along with the roof pitch. My rafters are running amount Nevertheless they sit on parallel curved prime plates. I am able to use twelve" rafters and make 10" of batt perform, leaving lots of air flow House. I'm able to drill the tops of the engineered joist flanges to allow ventilation 'up-slope' (perpendicular towards the rafters) as well as within the rafter bays, And that i can offer continual perimeter air flow (Cor-A-Vent strip) at my roof fascias (eave, ridge and gables).
1st, could it be easy to detect whether a roof is ventilated? If no soffit vents or facet vents are noticeable to the roof from the ground, does that imply the roof is not really ventilated?
It's Harmless to declare that an present house does not have excellent roof ventilation if there are no soffit vents or ridge vents. It is also Harmless to mention that, even if there are soffit vents and ridge vents, the roof is not ventilated if it contains valleys, hips, dormers, or skylights.
On the subject of fluffy insulation, are browse around these guys there any sources you may refer me to which deal with the differences among small, medium and significant density fiberglass batt insulation in the standpoint of loss of R-Value as a consequence of wind-clean (whether or not as a consequence of air infiltration or convection as a result of sizeable temperature variations entrance to back)?
Most rafters aren’t deep sufficient to support the insulation required to meet bare minimum R-values needed by code, especially if the rafter bays involve a air flow channel.
By Martin Holladay
Thanks Martin - Now I see why my original approach for any SIPS visit this page envelope was so elegantly straightforward. It appears like min R-ten sprayed underneath the roof sheathing after which you can a complete-fill with the bays with batt / fluffy, as well as a vapor sealed drywall official website lid can get me the 'scorching' (unvented) roof process the SIPS was with the get go.
Many thanks for finding the thread previously mentioned...Be aware that in post #seventeen, Robert Riversong talks concerning the "vented above roof". I agree along with you that this technique warrants some awareness for cathedral ceilings.
This article will go over insulated sloped roofs. The solutions described here can be utilized to develop an insulated cathedral ceiling over a terrific place, a section of sloped roof higher than a kneewall, or any comparable area of insulated sloped roof.
Sorry, Martin, I now know that "new design" won't automatically necessarily mean "new home to get built", and "an unvented attic, with R-fifty under the roof" ought to have been "an unvented attic, by having an R-fifty roof'. Simply because It really is clear to me doesn't suggest It truly is distinct to Anyone else.