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7 Answers

Any updates on Huber Zip Wall R Sheathing?

A while back I asked for opinions on my proposed insulation plan for a home I'm getting ready to build in PA - zone 6. The original plan was as follows:

(from inside to outside)
5/8 drywall
2x6 studs 24OC
cellulose sprayed in stud bay (R19)
OSB sheathing
two layers of 1in poly iso foamboard (staggered & taped) (R12)
3/4 strapping
fiber cement siding
approx r value R31

I'm now considering the following

From inside to outside
5/8 drywall
2x6 studs 24OC
3.5" Roxul batts (R15)
2 " closed cell spray (R12)
Zip wall R6 sheathing (joints taped) (R6)

In Energy efficiency and durability | Asked By Jim Orasky | Jan 18 12
1 Answer

Radiant Tubing: Aluminum Transfer Plates or Not?

I'm installing radiat tubing in the floor joist cavites of my first and second floor addition.

I've been advised that I need to use aluminum transfer plates with the tubing for maximum support and heating efficiency. I've also had people tell me I only need to attach the tubing to the underside of the subfloor by whatever method, then insulate the top two or three inches of the cavity to insure that the warm air there moves up through the floor, and does not fill the cavity and the ceiling of the room below, wasting heat.

In Energy efficiency and durability | Asked By Todd Audsley | Jan 18 12
4 Answers

What is the best way to soundproof a home between 1st and 2nd floor (apply Batt or spray foam)?

Does Green Glue really work for soundproofing? Someone recommended that I use two 1/2 inch sheetrocks and glue them with Green Glue for a media room and that will help. Not sure if you have any recommendations in that regards....Thanks.

In General questions | Asked By Vipin Sethi | Jan 17 12
7 Answers

Will poking small holes in 2 inches of exterior polyisocyanurate allow my wood studs to breathe?

I have a continuous layer of 1in polyiso on the exterior of the studs, then 2x3 strapping, and another layer of 1in polyiso inbetween the strapping. The stud cavities are rock wool. I have a 6mil poly vapour barrier and then a 2in layer of XPS before strapping and drywall on the inside of the studs.

In my attempt to get a high R value, I didnt fully understand the implications of creating a vapour barrier on either side of the studs. I am now concerned about moisture being trapped in the walls and the rot and mould that goes along with it.

In Energy efficiency and durability | Asked By bryan allemang | Jan 17 12
2 Answers

How do you measure board feet?

it says it will cover 105 bf

In General questions | Asked By stan ramires | Jan 17 12
2 Answers

What type of insulation?

I would like to insulate under my trailer using spay insulation.

In Energy efficiency and durability | Asked By stan ramires | Jan 17 12
2 Answers

What is better to use, foam in the exterior walls or go with Blow-In-Blanket (BIB) insulation?

We are building a home near Dallas. We are using 30# felt as the housewrap w/Brick construction and Demilec Sealection 500 open cell foam in the attic. We are trying to decide whether to use the same foam in the exterior walls or go with the Blow-in-blanket (BIB) insulation. Do you have any recommendations? Also if you any other thoughts for the attic as it relates to the use of spray foam (or if any other products are better and safer), please let us know. Thanks.

In Green products and materials | Asked By Vipin Sethi | Jan 17 12
3 Answers

Air barrier behind T&G paneling

We have some T&G paneling that is going to be installed on our walls and ceilings on a house we are building. Understanding that T&G paneling is not an air barrier we have typically installed Sheetrock first and installed our paneling over top the Sheetrock.

Our interior trim salesman says it is better to use OSB or plywood on the wall as sheetrock holds too much moisture and could cause problems with our T&G. He has been selling interior trim for about 30 years so typically trust his opinion.

In Green building techniques | Asked By Danny Kelly | Jan 17 12
5 Answers

Insulating crawlspace in a 200 year old house

We have a project involving a 250 year old house built on the side of hill that, 17000 CFM @50 pascals. The customer does not have a lot of money, so we are trying to figure out the best way to air seal/insulate the crawlspace. When running the blower door, there is noticeable air leakage through the floor boards and along all interior wall bottom plates. The oil furnace is in the crawlspace and although I would like to figure out a way to condition it all, the crawlspace is uneven and broken up by rock walls as part of the foundation, storage areas, and 5 foot high dirt piles.

In Energy efficiency and durability | Asked By Jim Hanson | Jan 16 12
7 Answers

Best practices for air-sealing sheetrock to top & bottom plates?

ENERGY STAR (ES) now requires that gypsum wallboard be caulked to top & bottom plates to reduce air movement from conditioned spaces to unconditioned spaces such as unconditioned attics. What are some of the products and practices employed by builders to satisfy this requirement?

In Green building techniques | Asked By Steve Vollstedt | Dec 1 11
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