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Making a house with a crawl space more energy efficient. Tips/thoughts?
Posted on 3/14/18 at 8:53 pm
Posted on 3/14/18 at 8:53 pm
Looking at a house that we like a lot (it's ~15 years old). Problem is it's off the ground. Our current house (65 years old) is off the ground and when we put our list together for "wants" in a house, on the ground was first.
So, what can be done to remedy cold floors and high energy bills that this house has/will have? 4" of spray foam? Heated floors in bathrooms? What else?
Or should this be a deal breaker?
So, what can be done to remedy cold floors and high energy bills that this house has/will have? 4" of spray foam? Heated floors in bathrooms? What else?
Or should this be a deal breaker?
This post was edited on 3/14/18 at 8:54 pm
6
Posted on 3/14/18 at 8:54 pm to poochie
Can’t being house to the ground, then bring the ground to the house
Posted on 3/14/18 at 8:58 pm to Chad504boy
It's a wood structure so can't bring it all the way up. And sealing off the outside has been known to cause moisture/humidity and mold issues.
Posted on 3/14/18 at 9:22 pm to poochie
Was always told a visqueen barrier under the floor joists was the way to go. It's a bitch to do and problematic for workers in the future. Good luck.
Posted on 3/14/18 at 9:42 pm to poochie
Planning to build a home at the moment and want it raised as we are in a slab home now. I want to be able to access piping.
Posted on 3/14/18 at 10:07 pm to poochie
I just bought a raised home. No insulation on underside, that’s gonna change tho Summer though. Without the insulation, it’s a bitch to heat and our utility bill for February made me wanna burn this bitch down. It should be easier to keep cool in the summer, but we shall see.
Posted on 3/14/18 at 10:26 pm to poochie
quote:
So, what can be done to remedy cold floors and high energy bills that this house has/will have? 4" of spray foam? Heated floors in bathrooms? What else?
Or should this be a deal breaker?
The first time you have to rip out walls and jackhammer up your floor to fix a leak you will curse a slab to eternity, or even better if it is in the attic, I have had both and much prefer conventional crawlspace.
Posted on 3/15/18 at 4:17 am to cave canem
Check to see if the floors are insulated under. The guest house I'm building, I will be insulating from under with 4" foam and then come back with some spray foam to seal any and all gaps. Them come back with 1/4" plywood nailed to the bottom of the floor joist. I will foam seal any gaps there to keep bugs or animals out. That will create a dead air space and help with cooling and heating. 
Posted on 3/15/18 at 6:15 am to poochie
Call an insulator who specializes in Icynene applications. Have them seal with a vapor barrier after curing.
Posted on 3/15/18 at 6:32 am to Tiger inTampa
The bad thing about visqueen and vapor barriers in a crawl space is it also keeps moisture in. One leak or pipe condensation poses a major mold risk in this scenario.
One thing I've found pretty interesting is the concept of conditioning the space by allowing air to escape from select ductwork. Plenty of issues to consider, but I wonder if it could work.
One thing I've found pretty interesting is the concept of conditioning the space by allowing air to escape from select ductwork. Plenty of issues to consider, but I wonder if it could work.
Posted on 3/15/18 at 6:42 am to fishfighter
Planning to do that with my house this summer, minus the spray foam
Posted on 3/15/18 at 6:45 am to poochie
Look up rock wool insulation. It is huge up north but relatively unknown down in the south. R23 batts that deaden the hell out of sound. Best bang for your buck. If you want to get anal, you could then put 1" polyiso across the joists and seal the edges to great the ultimate dead space with sound dampening. We are going to put in rock wool with 1/4" hardware cloth stapled across the joists to keep the critters from getting cozy in it.
Roxul Comfortbatt R23
Roxul Comfortbatt R23
Posted on 3/15/18 at 7:00 am to convertedtiger
I have rockwool sprayed in my house. Love the stuff. They mix in a bug repellant in it and I have never had a bug in my house in 20 years.
Posted on 3/15/18 at 7:41 am to fishfighter
quote:
I have rockwool sprayed in my house. Love the stuff.
It's also super water and mold resistant. Not to mention It burns at a crazy high temp like 2000 degrees and is a good fire barrier.
This post was edited on 3/15/18 at 7:47 am
Posted on 3/15/18 at 8:56 am to JAB528
I live in Florida with heat and humidity like Louisiana. We just got finished tearing out a floor in a house that was insulated underneath. The termites built tubes into the insulation and made nice, cozy little nests in there. They ate the floors apart and came up through the carpet then proceeded to eat the walls. I'm not sure how common this is, but it's something to think about.
Posted on 3/15/18 at 9:11 am to ChenierauTigre
When my dad built his house he poured a full slab with chain walls under where the supports would run. Bricked around bottom with metal air vents and a couple large access doors. You can take an automotive creeper and quickly access any point under the home. Their house is elevated 4’.
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