[Editor's Observe: Monthly bill Rose just despatched me the subsequent remarks in an e-mail; he incorporated his permission to submit the feedback.]
We experienced a Zip Roof installed and a metallic Roof put over it. The roof assembly just isn't vented and taped all around the soffits. Preferably I would want to pack the complete cavity with blown cellulose. This string of discussions is giving me pause for thought.
And so the query is: seal the stucco vents and include the spray foam roof and Don't be concerned about condensation? There exists very little minimal-hanging fruit within our kind of development, Specifically on present residences, Which is the reason people are getting sucked in the spray foam roof fraud.
1. You do not need an interior vapor barrier. In a very sizzling humid local climate, the vapor push is always from the outside towards the inside (assuming your making is air conditioned). Should your constructing just isn't ever destined to be air conditioned, the vapor travel will nonetheless be from the exterior to the inside, but there won't be much vapor push.
Regarding installation: Even though it's been productively put in in Europe for a few years, we have just gotten the fabric, and so we look forward to having it with a work web page before long and really installing it - and naturally, reporting back again the way it went.
two. Set up strong web page-crafted air flow baffles in Every single rafter bay before you spray the foam. Like that you end up having a vented cathedral ceiling.
I'm a homeowner with cathedral ceilings which were included during transforming and expansion of my dwelling inside the late 90s. Just the ridge beam is exposed. The remainder of the ceiling is covered with drywall. With the yrs There's been some condensation leak down the facet on the ridge beam on some mornings in March/April.The house is about four miles within the coast in Southern Califonia, so zone 3b. You can find four recessed lights inside the ceiling on the aspect from the beam that will get the condensation, but In addition there are lights within the aspect that is usually dry. There isn't a air-con in the home. Warmth is utilized during the night only about a dozen nights a yr, not over the condensation. Ordinarily the Home windows are open. It seems the condensation shows up on mornings when there's no marine layer (no clouds in the morning) as well as temperature heats up quite early following a very cool evening. The condition ceiling faces east/west and the condensation is about the east facing facet of your beam. The roof is black asphalt shingle. I'm sure that there is no caulk/sealant in between the aspect of your beam as well as place exactly where the drywall butts towards it, so there is a compact air gap there.
You'll want to seek advice from an electrician about The easiest way to provide your ceiling electrical boxes. There are numerous achievable options -- some noticeable from the interior, and several concealed by the new foam.
Most making codes call a fantastic read for 1 square foot of Web totally free ventilation spot For each three hundred sq. toes of attic ground place, assuming that fifty percent of your air flow openings are located during the soffit, and 50 percent alongside the ridge.
In the final summary it reads: "If you're utilizing fluffy insulation, you require two air boundaries: a single below the insulation, and a person over the insulation.
You don't describe no matter if That is new development or perhaps the renovation of the current setting up. I relatively suspect It's really a renovation -- or else one may imagine that the designer of your constructing would also have offered a style and design in your roof.
Doug... For some purpose I did't see your publish #17. Seems like two of us at least Imagine there is likely to be a surprisingly easy affordable Option.
A whole new standalone immediate vent fuel stove goes in for the significantly stop of your home underneath the metallic box. I determine if we use XPS board, it must be pulled back again numerous inches from all around that region, but I failed to Consider it would avoid me from using XPS fully. Looks like Roxul is less of a concern when it comes to warmth/hearth.
The roof was shingles on t&g pine decking. Insulation was right up in opposition to that pine decking considering that 77 and it is 2014. Stuff seems like it absolutely was mounted yesterday. Not a foul location any where, no roof vents completely unvented roof.