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!


3 Answers

In western NC I am considering using 7" of closed cell foam in a retrofit project and wonder what costs are/ sq. ft.?

in a retrofit cathedral ceiling. Any idea of cost per sq.ft.?

In Green products and materials | Asked By John Duncan | Sep 6 12
2 Answers

Is painting brick fascia good, bad?

My wife wants me to paint the brick fascia on our circa 1965 house located near Baltimore, Maryland, zone 4A. What are the pros and cons of doing this with respect to reservoir effects. If it is ok is any special prep work required and what kind of paint should I use? Also, I notice there are no weep holes; was this common in the mid 1960s; is it something I should do something about? Thanks for any help.

In General questions | Asked By Windsor Furr | Sep 6 12
3 Answers

I have few questions I need answered that deal with rigid foam

1. I thought Green Building Advisor had more information about fasteners for rigid foam? I've done a search and all I've come up with is one product is there a link that I'm missing?

2. I'm going to put foil on the outside of my foam for a radiant heat barrier but I would like to know it there's a spray adhesive I can put on the foam then stick the foil to? I'm putting a stone exterior over the foam and I need the foil fixed to mark out lines for my studs? The foam I'm using is Foamular 250.

In Green products and materials | Asked By michael kasales | Sep 6 12
1 Answer

Is the site down? Not seeing any of the usual stuff, just one big ad.

See for yourself

In GBA Pro help | Asked By matt berges | Sep 6 12
6 Answers

Low E House wrap

Has anyone had any experience with Low E House wrap. Due to the existing design of this new home I am looking for the least expensive way to minimize thermal bridging. I am building with ICF foundation, 2x6 exterior studs, spray foam insulation, 1/2 plywood sheathing, cement board siding. At this stage of the game I can not afford to have this home re engineered. Looking for as efficient as I can get.

In Energy efficiency and durability | Asked By Dana St.Ours | Mar 26 12
1 Answer

Polyethylene sheeting alternatives

Our project hoped to omit a poly air/vapour detail by opting for air-tight sheathing (with larsen truss over top)and a vapour barrier paint (vbp). unfortunately, the building inspector is not only not buying what i'm selling, he is clearly not impressed. so, i am commited to our air-tight sheathing approach: will it be unhealthy for the wall system to then use a conventional poly vapour barrier detail? the british columbia building code (bcbc) allows for a "wall coating" alternative to poly; does anyone know of a specific product that meets these specs?

In General questions | Asked By erik olofsson | Sep 6 12
1 Answer

Thermal wall value, condensation point, and air/vapor sealing above a bathroom?

I live in NH - zone 6A, average cold temp 6F in January (not last year - slush sucks!).......
Heating degree days are between 7800 - 8200

I am getting ready to buy and then do a whole house renovation (foundation, walls , to roof) on a 1858 old farmhouse - pics here (I am closing on the property in the next couple weeks):
https://picasaweb.google.com/brad.hardie/FarmhousePicsAndPlansPriorToPur...

In Energy efficiency and durability | Asked By bradley hardie | Sep 5 12
2 Answers

Re R Rating on Loose Cellulose

I know R rating is 3.7 per inch for Cellulose, what is it if roof is filled with 75mm thickness of Cellulose? or what is formula. Would not think it would be 3 times, as never heard of higher rating over 6
Thanks Colin

In Energy efficiency and durability | Asked By Colin Mendoza | Sep 5 12
5 Answers

Basement: Whether/how to insulate

Hi, I'm a consumer building in Zone 5A (NC mountains, elev. 3700'). I've read a lot on here about insulating basements, and the more I read the more confused I get! The questions are should I insulate, and if so, how.

Background: half of the house will be over basement, likely unfinished, probably unconditioned. One wall is fully below grade, two walls are mostly below grade, and the fourth wall is fully above grade. The basement will contain HVAC equipment (HP or mini, ducts), water heater, etc. The other half of the house will be on slab-on-grade.

In Energy efficiency and durability | Asked By Ed Siff | Sep 2 12
10 Answers

Closet and pantry shelves - no/low VOC material

I am looking for materials to build closet shelves. The biggest wood board I can find is 11 1/4" deep which is not deep enough for closet shelves. I can use those for high pantry shelves.

For plywood, the only low VOC plywood I found is Columbia Forest PureBond plywood. If I use PureBond, what low VOC edging material can I use to cover up the edge?

Any other options?

Thanks!

In Green products and materials | Asked By Rian Bart | Sep 3 12
Register for a free account and join the conversation


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