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!

1 Answer

Installing a septic system in Zone 4A. Soil is good -- 60 MPI.

Asking if chamber system is better than 10" pipe ? Has anyone installed a chamber system and how did it go? Are they better than 10" pipe without gravel system?

In General questions | Asked By carl mirabile | Sep 26 11
5 Answers

I was wondering if you have to vent the underside of an exterior awning that is not a roof and has no insulation in it. It will have T&G decking on the underside.

In General questions | Asked By Sam Miller | Sep 26 11
5 Answers

Greetings all - I'm getting ready to tear the roof off my 1944 Cape Cod in zone 4C. The house has a finished attic and I would prefer to not disturb the interior, so (since the roof is coming off anyway) I plan to do any work from the outside.

This may all sound familiar - I just learned, quite accidentally, that my house was the star of a GBA blog post last month!

In General questions | Asked By thaddeus cox | Sep 22 11
7 Answers

Can anyone produce a list comparing the average airtightness of the most popular wall systems?, tyvek and fiberglass, airtight drywall and fiberglass, taped EPS and fiberglass, sprayed caulk and fiberglass, same where applicable w cellulose, open cell, closed cell foam? I know everyone has their favorites, and there are a million variables,

In GBA Pro help | Asked By william goodwin | Sep 25 11
6 Answers

I built my house using Zip roof sheathing and Zip wall sheathing.
The makers of Zip panels say that an underlayment for the roof and that a house wrap or felt for the walls is not necessary.

The Zip roof sheathing withstood the weather fairly well for the 6 months before I got the metal roofing on.
However, heeding advice from roofers, I did install a synthetic underlayment just before putting on the metal roofing.

On the walls, I was also considering putting on a layer of the same synthetic underlayment before hanging the vinyl siding.
But I have been told that I should use felt inst

In General questions | Asked By Jim Wright | Sep 22 11
2 Answers

I have an older house (built between 1920's and 1930's). The original house had clap board siding. A previous owner was a mason, and installed a brick veneer. There is an airspace between the two that is at least two inches wide. Right now I am having trouble with flying insects and more ending up in that airspace. Knowing that I have to find the holes that allow the insects in, I was looking for a way to insulate that space to keep air flow to a minimum.

In General questions | Asked By Christopher Brunner | Sep 26 11
9 Answers

I just added a new drain pipe to remove excess water from under the basement footing and from a rainwater tank to a garden near the street. See the attached pic, taken yesterday.


At the end of the pipe will be some crushed stone leading down to a drywell.

Question: has anyone ever insulated a drywell to keep it useful for more months out of the year? I have some reclaimed 3" EPS foam I would like to use.

Details on the drain system, popup emitter for handling bursts of water, and drywell plans so far are here:

In Energy efficiency and durability | Asked By rich cowen | Sep 24 11
5 Answers

I'm working on a project that would be made a million times better if I could embed LED diodes into the EPS that I am using....

I understand that EPS is by nature highly flammable, but seeing as it's used as insulation, I'm wondering if embedding the diodes in it would really be a problem.....

Any insight would be very appreciated...

In Interior design | Asked By Krista Pegg | Sep 24 11

So this months JLC has a letter from Thor Matteson concerning gluing shear wall panels to studs, quoted below.

In General questions | Asked By David Argilla | Sep 25 11
2 Answers

I'm in zone 4/5 B (Albuquerque) with a 1950's CMU bungalow. I'm trying to decide which insulation product to go with. I've contacted several contractors and none are inspiring much confidence. With the foam board insulation they had very little to no knowledge of Polyiso. The EIFS guy had only worked with EPS, but was willing to try Polyiso. One was not willing to sheath the exterior chimney. Others were unwilling to do more than 2 inches of insulation.

In Green building techniques | Asked By seth downs | Sep 8 11
Register for a free account and join the conversation

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