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2 Answers

Uninsulated flex duct: Does it lose its sound-dampening qualities?

I'm working on my HVAC material list. All of my branch lines are short and straight. I see where people suggest flex duct for these applications (if installed correctly) for it's sound dampening benefits. However, I am running the ducts inside soffits, and I want the ducts as small as possible so the soffits don't get too big. Since I am inside the thremal envelope, I don't need insulation. Insulated flex duct adds 2-4" to the overall duct size.

Asked By Clay Whitenack | Sep 24 16
2 Answers

Supplier for small registers and boots for ducted minisplit?

Hi all,

I have a completed manual J, S, D, & T. Now I have to find the different parts an pieces.

Because of the small loads in the house, the ducts and fittings are smaller than what I see in stock at the local big box suppliers. For example, I need 4x4 and 4x6 duct boots and register grilles. Where can I find those size fittings?

Asked By Clay Whitenack | Sep 26 16
2 Answers

Wood wool cement acoustic panels in North America?

I came across an interesting product for acoustic control: wood wool + cement panels.

They have a great look:

but the only suppliers I've been able to find are Scandanavian:

Since it seems to just be wood + cement, I was wondering if there are any US or Canadian suppliers.
I'm outside of Portland, OR, and don't like the idea of shipping a container of wood across the world = )

Asked By Kevin Lynagh | Sep 23 16
2 Answers

Sanity check on energy efficient window pricing

I'm pricing out energy efficient windows, and am wondering if the quotes that I'm receiving are typical. I'm looking at white, triple glazed, low-e, argon or krypton filled fiberglass new-construction casements with no grids. I've received quotes from two Canadian manufacturers that are both $47/ sq. ft, uninstalled. Does that seem in-line with other people's experience buying windows?

I'm aware that vinyl windows would be cheaper, and that double pane windows probably have better ROI. Having a firmer idea of pricing will help with that math for my house.


Asked By John Ranson | Sep 22 16
13 Answers

Quest for EPS

Finding extremely limited offering of eps rigid insulation in my region (upstate ny, north of Utica).
In my manufacturer search I found a product made by Cellofoam called Polyshield. They describe it as a sheathing product and it's eps with polymeric facers on both sides added for strength.
Is anyone familiar with this product?

Asked By Daniel F. Vellone | Sep 20 16
16 Answers

Source of ammonia odor in a home (indoor air quality)

We have built a home which is well air sealed and have registered for LEED status, which will be finalized later, when the alternative energy projects and landscaping are complete.

Asked By Andrew Katz | Sep 10 16
4 Answers

Unrealistic R-value claims are alive and well

OK, someone please explain to me how they claim R-64 while only using 8" of EPS which is around R-32? They claim R-8 per inch of insulation on the wall or roof.

Asked By Peter L | Sep 15 16
7 Answers

Recommendations for exterior molding material

Hi all,

I am working on the trim design for our front porch. I have an idea for how it should look, but our builder is recommending an aluminum wrap to protect it from the elements. I appreciate the concern for the maintenance of wood, but worry that the aluminum wrap will flatten all the details and kill the look. I see there are PVC mouldings that you can get that obviously require less maintenance, but our builder said that PVC will move a lot in the heat and we'd end up with gaps.

Asked By Clay Whitenack | Sep 7 16
2 Answers

Interior door options: MDF off-gasing vs. sound dampening

I am slowly building a house in the coastal mountains of Oregon and have finally gotten to the point of needing to install interior doors. Thus far there is no MDF or other materials inside the house that are known for large amounts of off-gasing. Also, I have gone to extra lengths to make sure that the rooms don't have a lot of sound transfer from one to the other. But now it seems I must make a choice between the two.

Asked By Kail Zuschlag | Sep 7 16
2 Answers


Anyone with any experience with Enduramax by Oldcastle Architectural? The product looks like it could be a great way to add stone veneer to a OSB sheathed home. Adding the exterior EPS and the stone in one step. At least EPS that I will need in Phoenix.


Asked By Jeffrey Savage | Sep 5 16
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