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1 Answer

Bubble Insulation - Double Wall

Is double wall bubble insulation more effective than normal bubble wrap for insulating windows. The following is a link to the type of bubble wrap I am talking about:

https://www.uline.com/Product/Detail/S-20055/Bubble-Rolls/Super-Duty-Bub...

Thanks,
Rachel

In Green products and materials | Asked By Rachel Glube | Sep 26 16
0 Answers

I'll be speaking at the EEBA conference tomorrow

GBA readers in Texas may be interested in attending the annual conference of the Energy and Environmental Building Association (EEBA), which starts tomorrow in Frisco, Texas. I'll be giving a presentation there tomorrow morning on cathedral ceilings.

EEBA is a great group -- they have been promoting energy-efficient construction practices since the 1980s. I hope to see some GBA readers there.

For more information, check out the conference web site.

In General questions | Asked By Martin Holladay, GBA Advisor | Sep 26 16
4 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.

--John

In Green products and materials | Asked By John Ranson | Sep 22 16
9 Answers

Condensation on plexiglass?

Hi,

In fall-winter-spring, I have lots of condensation on my double-pane windows. After reading multiple sources on the Internet stating that condensation does not form on acrylic, I fastened a plexiglass sheet on a window to test. I lowered the double-cell cellular shades for the night.

This morning, I realized that the test failed - there was fogging on the bottom part (but no droplets). I guess I read the wrong sources or I did something wrong.

Which one is it?

Thanks for your help!

In General questions | Asked By Marc Delisle | Sep 25 16
3 Answers

Could a heat pump unit be used to heat a crawl space that is closed in?

I'm thinking about having a heat pump system added to my mobile home. The home is about 1500 sq. ft., with a crawl space about 3 1/2 ft from slab to bottom of the mobile home.
This would help heat the floor above and allow me from leaving my home unoccupied for a time during the winter and only have the heaters keep temps around 56.
Well above 35 degrees.

Could this be done?

In General questions | Asked By Leonard Klinger | Sep 25 16
3 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.

In Green products and materials | Asked By Clay Whitenack | Sep 24 16
8 Answers

Polyiso in bonus room

I'm starting the process of finishing my upstairs I'm located in piedmont of north Carolina. My house is 5 years old I have soffit and Ridge vents 1 dormer simple roof line 2x6 rafters . I found a deal on Craigslist for polyiso the problem is its foIL faced on both sides . My plan was to cut and cobble 3.5" pieces between rafters flush to interior of rafters leaving a 2 inch gap from soffit to Ridge vent then install 3 " polyiso on inside of rafters to adress thermal bridging then 1x3 nailers for sheet rock. Is this a sound plan?

In Green building techniques | Asked By Eric Teer | Sep 24 16
58 Answers

While I love radiators, I hate using fossil fuels

I live in an 1890 Victorian in Southern Pennsylvania, heated by oil. While I love radiators, I hate using fossil fuels! Is there a way to use green technology to use less oil? My methods to date have been uncomfortable - installing a wood stove.

Is there a way of boosting the boiler with green energy? Would geothermal help? I'm newly divorced and ignorant about systems!
Thanks, Susan

In Energy efficiency and durability | Asked By Susan Hanway | Aug 28 16
1 Answer

Rain screen detail on chimney box with brick veneer and flashing detail

Building chimney box on peak of roof for chimney pipe and plumbing vent to exit. Thin brick veneer with a rain screen detail. The lid for the chimney box is elevated 1/2" for an air gap with 3.5" down turned legs for weather protection. All good so far, but when I go to install the step flashing on the roof next to the brick and then the cap flashing over that which it's mortared into the grout line, there is now no more ventilation from the bottom of the rain screen as it has been sealed off with the flashing details.

Is this an issue?

In General questions | Asked By eric Mikkelsen | Sep 24 16
3 Answers

Is HPWH reliability still an issue?

I'm seeing a lot of negative feedback on the reliability of heat-pump water heaters. Are they much more prone to problems than straight resistance heaters? If you had to choose a 50-gallon domestic model, what would you choose?

In Mechanicals | Asked By Charles Campbell | Sep 23 16
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