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7 Answers

Why?

I am having trouble understanding why you can't pack insulation into the entire wall cavity of a PERSIST structure but you can cover your sheathing with foam and pack that wall with insulation. What am I missing?

Thanks, John

In Energy efficiency and durability | Asked By John McCormack | Jul 7 12
0 Answers

Floating floor squeaking

We are finishing out the space next to the garage in an existing home. Living space is currently on second level. We are installing a floating floor over concrete slab. We have 2 layers of 1" XPS both layers taped with 3/4" T&G Advantech plywood on top. We were told not to screw through into the slab by our friends at BSC because they have seen many warped floors that have screws. We stopped the ply 3/4" from walls. We have not installed the oak floor yet and we have lots of squeaking (sounds like the XPS is rubbing against itself) when we walk on the plywood. Has anyone had this problem?

In Energy efficiency and durability | Asked By Pamela Goode | Jul 9 12
2 Answers

What is your recommendation for a design software package for a six unit seniors development.

Using Ross Chapin's Pocket Neighborhood philisophy, we want to work up conceptual designs for both a row house and for separate small units.

My computer is a PC running Windows 7.

In General questions | Asked By Anthony Ratliffe | Jul 8 12
1 Answer

Does closed foam insulation need to be enclosed

I have finished my basement and have used a closed cell insulation against all cement walls. I have sheet rocked all living and bathroom areas. Do I need to sheet rock over the foam in the storage areas as well?

In General questions | Asked By david durot | Jul 7 12
3 Answers

siding & rainscreen questions

I am in the middle of putting an addition on my house in central Virginia, and trying to decide what sort of siding to use. I have regrettably sheathed the structure with OSB rather than plywood, and I'm interested in taking care to ensure maximum drying potential, given what I've read on GBA about OSB's inferior drying properties.

At this point, the OSB is covered with Typar, taped at the seams. I plan to put a rainscreen of some sort on top of the Typar to prevent sun-driven moisture from infiltrating the wall. I'm planning to use lapped siding, either cedar or fiber cement.

In Energy efficiency and durability | Asked By Timothy Godshall | Jul 7 12
7 Answers

What makes the most sense for an energy efficient bungalow rehab?

Hello everyone,

I’m embarking on a gut rehab of a 1908 bungalow in southeastern Vermont with a very limited budget. It’s 1,000 sf on the first floor and 500 on the 2nd floor attic space. To get a construction loan, I’m in a crunch to get estimates and a scope of work in a very short amount of time. I’m feeling as though I should fasten my seatbelt! I just started working with a green builder and would love to hear from the GBA community on a few key issues.

In Energy efficiency and durability | Asked By Theresa Spear | Jul 4 12
31 Answers

Double wall with cellulose and zip sheathing in the NW?

I'm slowly getting rid to build a house in Seattle (zone 4c) and have a wall system I think would work well, but wanted feedback:

Cladding (hardi-panel) on furring (rainscreen) on building-wrap (tyvek or similar) on zip sheathing (taped) over a 12" thick 2x4 double wall (staggered?) filled with dense-pack cellulose with drywall finish.

I know the zip system is a WRB but I would be using it mostly as an air-barrier and preferring the mechanical joint of lapped building wrap to a chemical joint of the zip tape (although that would be a backup).

In Green building techniques | Asked By Daniel Stewart | May 29 12
2 Answers

Best insulation method for new construction, 3-ply flat roof in Central Florida?

We are building a new home in Central Florida - hot and humid weather. Home is 2 story, CBU on 1st floor and 2 x 6 frame on second story. We have a very low pitch, commercial grade flat roof with 2 ft overhangs. There is only about 2 ft space in the trusses and much of that is filled with A/C ductwork. The builder had planned on R-39 blown-in, but now realizes this will be very difficult to get in the space properly, and then vented soffits are going to allow wind drift of the insulation. After reading here, we've decided on non-vented soffits since we have a flat roof.

In Energy efficiency and durability | Asked By Kimberly Naoumoff | Jul 6 12
1 Answer

How do you apply exterior siding over metal building siding.

We have a metal home and would like to add a more appealing siding over the metal sheets. Any suggestions on how to do this?

In General questions | Asked By Casey Wall | Jul 6 12
2 Answers

How should I frame and insulate?

I am building a 2300 square foot, 1&1/2 Story, home for my family on the seacoast of New Hampshire. The building's foundation is going to be a slab on a frost wall with radiant heat. The footings were just poured and I am about to order material for the frame. I want to build a simple fairly energy efficient building.

In Energy efficiency and durability | Asked By John McCormack | Jul 5 12
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