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4 Answers

Nailbase SIP vs. rigid foam retrofit cost?

Posed question before about doing 4" of rigid foam on sheathing of 2X4 walls. Been reading and am interested in possibility of nailbase SIPs from company like Premier SIPs. These sound like wonderful products (I'm a big fan of SIP construction).

Asked By Matt Tackett | Jun 1 13
2 Answers

Would like comments comparing 5-ply waterproof plywood with Huber ZIP wall and roof sheathing

I will be building a U.S. EPA Energy Star to be certified home, (24'x40'), and am trying to decide upon the best sheathing for the walls and roof.

The proposed configuration for these two are:

1. Walls (2x6, 16" OC): vinyl siding, mesh rain screen, 3/4" foil faced polyisocyanate rigid foam (taped), either 5/8" 5-ply waterproof plywood or 5/8" Huber ZIP sheathing (both taped), 3 1/2 - 4" closed-cell spray foam, remainder of 2x6 cavity with open cell spray foam, sheetrock.

Asked By JOSEPH POLAND | Jun 1 13
2 Answers

Cost-effective flooring over slab?

Our in-laws have an slab foundation and wood flooring mostly -- but not in the entryway -- leaving a 1 3/4" elevation difference. To make it more wheelchair accessible, we would like raise the entryway floor elevation to more closely match the wood floor.

Asked By Patrick Walshe | Jun 1 13
1 Answer

Root cellar construction advice -- concrete additive?

Hello! This summer we are building a greenhouse addition with an underground root cellar attached. In one of the root cellar books I read, they recommend Everdure Caltite as an additive in concrete to make the foundation waterproof. What are your recommendations?

Asked By Leah Marshquist | May 31 13
4 Answers

Is the aging of urethane foams considered off-gassing?

So I'm a bit confused here. My understanding of urethane foams (e.g. closed cell spray foam or polyiso) is that the blowing agent gases trapped within the closed cell structure slowly leak out over time and is replaced with air, depreciating the R-value. But then I see that certain companies advertise that their polyurethane spray foam products/kits do not off-gas. Is the leakage of the blowing agent not off-gassing, or is the manufacturer making a false claim? I'm assuming that they use an HFC blowing agent. Maybe I'm just missing something.

Asked By Mike LaCrosse | May 31 13
5 Answers

Mold removal

I would like to know what the safest most effective product is used to remove mold from wood.
I have mold in my attic and want it out. When hiring a clean up company what questions should I be asking about the method of clean up they employ? My husband wants to clean it, but I think because of the location and extent of the mod,it covers the whole length of the attic roof,I think we should find someone to hire. I have cellulose insulation and I'm debating whether to remove it all and start over? How would I know if the insulation is salvageable?


Asked By sarah matheson | May 25 13
2 Answers

Compressible gasket under car decking

I'm working on a house where the roof will be exposed glulam beams with tongue and groove car decking as the finished surface. The car decking will extend continuously beyond the wall and become the soffit for the overhang. I'm concerned about air-sealing between the car decking and the top plate.
I was thinking that some kind of compressible gasket or foam would be able to compress into the chamfered "v" shaped sections of the car decking.

Is there a specific product that would work for this?

Asked By Daniel Stewart | May 24 13
4 Answers

Does anyone have experience with the Dow Powerhouse Solar Shingle?

Can the Dow Powerhouse Solar Shingle be safely installed on an unvented cathedral ceiling/roof which is insulated below the deck with impermeable closed cell insulation. will this Dow system trap moisture and condensation below it? What about the Certainteed Solar system which is installed directly on the roofing deck? For solar PV systems with modules raised off the roofing deck, what is the long term effect of shading, moisture and fungus on these shingles? Do these shingles below the raised solar PV module have to be replaced before the life expectancy of the solar PV system?

Asked By JOSEPH POLAND | May 19 13
19 Answers

Experiences with grey-water and composting toilets?

Grey-water toilets: The Aqus toilet system ( like the most popular (only?) grey-water toilet available. I really don't like the fact that it installs with a purification system and electric pump. Does anyone know of a model that does not have these features?

Asked By Lucas Durand | Oct 20 10
5 Answers

Say you want a door but you also want to use it for solar gain. Is there a type of door style/material/size thats best?

I can't seem to get values for doors from manufacturers or when I do, the SHGC drops precipitously once you put the glazing in the door, e.g., Sungate 500 SHGC drops from .6 to less than .4 when put in a swinging fiberglass patio door. Of course glass size is limited to about 2 ft width, although the length is long. How I get what I need in SHGC in a south facing door. Do I change door style, size of door/glass, material, glazing brand, ? etc. Thanks

Asked By Lisa Young | May 16 13
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