I am working, doing audits, with a contractor who tends to make basements, crawlspaces into conditioned space. Especially when all or most of the duct work is in the crawlspace. He does this by…Continue
"Be sure plastic is protected from mechanical damage by any future workers or residents accessing crawl space
Be sure to leave exposed strip for termite inspection. If termite bond is in place, be sure they are on board with details of the project -…"
"Should have qualified our location. Climate Zone 2, Santa Rosa where we had 1580 HDD in 2011 and have 1453 HDD to date.
So given "our mild climate zone," does anyone have data that supports the additional expense for a…"
"In crawl spaces I have encountered upstate NY
6800 HDD and generally wet
walls are stone or block & stand 2ft or more above the exterior grade
Interior grade is less than 2 ft below exterior grade
Limited access to space, no storage
"To my knowledge no, though I do have to laugh at "mild climate" & California as that state falls under 7 diffrent climate zones & recall dealing with roads closed due to snow in June.
Like almost everything it depends on where…"
"Actually the one study I know of pulled the plug on a house in Flagstaff due to Radon levels increasing because it lost the dillution ability of a vented crawl. With that said depending on your area it still can be worth doing & just making…"
I am working, doing audits, with a contractor who tends to make basements, crawlspaces into conditioned space. Especially when all or most of the duct work is in the crawlspace. He does this by covering the floor, side walls and piers with heavy plastic. He then uses rigid foam insulation on the walls, foams the joints and above and seals the vents and access hatches. Then we duct seal and re-insulate.Has anyone been doing this for a while? Any unentended consquences?See More
"In cold climates using the HVAC system to condition the crawl space is in most cases the best way to provide the comfort factor the homeowners expect from a new system. Leaving the crawl space unconditioned leaves the floors cold that can lead to…"
"As always, check your state code. If you're using HVAC air, you may be required to insulate the walls of your crawl space. That could lead to higher initial costs than just getting the dehumidifier.
While insulated and conditioned…"
"Most of the experts (EPA, DOE, Advanced Energy) recommend conditioning an encapsulated crawlspace using 1CFM from existing ductwork if available. We find that is more cost effective than buying and running a dehumidifer. Of course, sometimes…"
We would normally seal the duct to make sure we are getting the most efficient, and cost effective return for our customer. Normally return air is not taken from sealed crawl, so any air that would enter the supply air system could…"
"Well, there are so many factors to review with your local code enforcement:
1. 3" gap at top of insulation from foundation wall
2. insulation offset from ground
3. appropriateness of foam board insulation in crawlspace (Thermax, for example,…"
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