Q&A: A Forum for Green Building Experts and Beginners

[Click map to enlarge]

Please register for a free account or sign in to ask and answer green building questions.

The usual rules of courtesy apply:
1. Be nice.
2. If you can't be nice, be polite.
3. If you can't be nice or polite — well, please be brief.

To attach a photo or illustration:
Under the box labeled "More explanation," look for the words "File attachments."
Click that, and you should be able to attach a photo.

Thanks for joining the conversation!


6 Answers

Heating a vacant home

Hi,
We live in Halifax Nova Scotia and planning to leaving for a 5 Month stay in Florida. Ouir house will be vacant. We have a mini heat pump installed and our home is very well insulated and tight.
I lke to leave some heat on so I plan on leaving the heat pump running at 65f in the basement backed up by our electric baseboard heat set at 50F. All other thermostats will be turned off. The house is 3 story about 2700Sq Ft.
We also have a HRV.
Should we leave our HRV on?
Can you advise be on my overall plan?
Thank you

In General questions | Asked By Jim Westlake | Nov 13 14
3 Answers

Site tools

Is there an "ignore" and report a post link most sites have? The ignore list adds members so you don't have to read their post, for example you find most of a members post are of no value or annoying. The report link for members that continuously high jack or take threads off topic degrading the quality of info on GBA.

How about emoticons for better communications?

In General questions | Asked By Terry Lee | Nov 12 14
2 Answers

Does my ICF foundation require additional protection or barriers applied before backfill?

In my case the house is located in southwest Colorado at 6900' elev. on a sunny south slope. The soil is moderately expansive clay so the foundation is 48" on top of the footer on top of 12" compacted structural fill. Footer perimeter drain ( smooth pipe in gravel bedding) all around, ground will slope 1:10 away from foundation to a french drain system, and ground gutters or sub-grade pond liner will be installed on the north side to keep bulk water away from the foundation, so good drainage and water control.

In General questions | Asked By Chuck Jensen | Oct 10 14
5 Answers

How do I prevent condensation in our brick/clay block/cement plaster home?

We bought a foreclosure home, which is constructed of brick exterior, clay block interior wall which is covered with a layer of cement plaster. No one was able to afford the utilities on this home since there is no insulation, or the ability to insulate, without altering the unique interior design. We repainted (2 coats) with ceramic microbeads, which cut the heating utilities from $600/mo to under $300/mo. But in the process, we have created a condensation problem.

In Energy efficiency and durability | Asked By Jeff Bauer | Nov 11 14
10 Answers

Reasonable retrofit efficiency goals

As I battle with an hvac solution for our home, we are leaning more and more towards trying to reduce the load further. I'll mention some details of my own house a bit below but I'm actually asking in hopes of a more generalized discussion of what a reasonable retrofit btu and ACH50 goal is.

I did some reading tonight in the hopes of answering this question but didn't find any useful rules of thumb. I know, the old HVAC rules of thumb have caused a lot of grief. I'm not asking for a rule of thumb about BTUs/sf for heat but rather what is rationally achievable in a retrofit scenario.

In Energy efficiency and durability | Asked By Keith H | Oct 19 14
1 Answer

What trade shows/ education should a fella attend?

Hi!

In General questions | Asked By John Stephany | Nov 12 14
1 Answer

How to seal and insulate a crawl space in a humid environment

We purchased a second home on a lake in mid-Michigan in Winter. With Summer, we discovered a moisture problem in the very narrow (16" deep) crawl space. The previous owner had put 6" fiberglass batts under the floor to insulate the crawl space and used plastic film as a vapor barrier over some of the ground. When we crawled through this narrow crawl space, we discovered the fiberglass batts were wet and falling into the crawl space, mold was forming on the floor joists, and there was water puddling on the vapor barrier covering the ground.

In General questions | Asked By Colleen Bruning-Fann | Nov 12 14
2 Answers

Exterior rigid foam plus celluose rafter insulation questions

I have a difficult-to-insulate second floor with as-yet uninsulated side attic kneewalls and an insulated attic above most of the living space. The rest of the 1917 house has gotten lots of energy upgrades: minisplits instead of 80 y.o. furnace, 3 inches of foam under siding, etc. It's just the attic left.

In General questions | Asked By arthur strum | Nov 11 14
98 Answers

The differences between mass and insulation

The "I installed more attic insulation and now my AC runs more" thread got me thinking about the mass effect a bit.

In Green products and materials | Asked By Nathaniel G | Sep 14 14
3 Answers

What's up with ComfortTherm plastic-enclosed batting?

My contractor came home today with some fiberglass batting wrapped up in plastic that says "vapor retarder" on it. It's this stuff in the vapor retarding form: http://www.rockweilerinsulation.com/documents/JM_ComfortTherm_Batt_Spec_...

In Green products and materials | Asked By Andrew Levitt | Nov 11 14
Register for a free account and join the conversation


Get a free account and join the conversation!
Become a GBA PRO!