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!

2 Answers

I have a house that was built in the late 1960s and in the basement I have a aprox. 3 foot round hole with a steel or catiron liner the is about 4 feet deep. This liner has several inlets coming into it that appear blocked. 2 are approx. 2" in diamator ands on is 3/4'' in diamitor. What I need to know is given the information above could this be a french drain type system and how would I know Also is there any way to figure out where the ppipes for such a system would run as the basement has a concrete floor?

In General questions | Asked By Steven Conlin | Sep 4 11
6 Answers

I'm looking at 2 types of electric towel warmers in a bathroom remodel and am confused at the difference in heat output with similar watts.

One model (http://www.towelwarmersplus.com/products/classic-arch/) has a 300w element, is oil-filled and has 2267 BTU output. The other is filled with glycol/water says 240watts and 818 BTU. (http://www.ambatowelwarmers.com/jeeves/jeeves-d-curved-towel-warmer.php)

In Energy efficiency and durability | Asked By Jude Rees | Sep 4 11
3 Answers

I live in zone 2A north of Lake pontchartrain. I am building a gable house with living area upstairs. The roof is galvalume with a metal ridgevent. The ceiling in the upstairs living area is cathedral then it goes flat. Should I go to the trouble of providing air space under the roof sheathing or close off the ridge vent with closed cell foam and foam the underside of the sheathing?

In GBA Pro help | Asked By dwight foreman | Sep 2 11
2 Answers

New construction, East Tennessee, zone 3B. The roof will be unvented, and insulated at the rafters (with a thermal break) to R-40. In a 2,000 sq.ft. plan, I want to use three 2’x4’ skylights to brighten interior spaces. I am also partial to skylights because they allow one to hear the rain and feel more connected to the outdoors.

Also, is there a way for normal people like me to model the effect of windows on the wall assembly? I’d like to test the difference between glazing options, and also size choices.

In Energy efficiency and durability | Asked By David McNeely | Sep 1 11
1 Answer

Why do Owens Corning unfaced fiberglass batts smell like burnt coffee? Perhaps the batch I'm currently inspecting was stored inside a coffee roastery. Or is it something else? On a related note - When will we be able to upload smells to the site? I hear the iPhone 7 will have an app for that.

In General questions | Asked By John Semmelhack | Sep 2 11
1 Answer

So the 3 fmethods of energy flow - Radiant, conduction, and convection.

Is there data that show heat loss or gains through the different part of the structure, ie walls, ceiling, basement floor broken down by heat flow method.

On top of that is there anything showing the walls and cieling with different type of insulation. I realize that iy id noy going to be consistent across all homes.

In General questions | Asked By Robert Hronek | Sep 2 11
13 Answers

Thank you for taking my question. I am planning a renovation/addition to my home and am using 2x4 wall framing with 2" of rigid foam board on the exterior beneath vinyl siding. My question is: can i use 2x6 window jambs in this construction so that i won't need to do the plywood box approach in the "innie/outie" debate i read earlier on the site (http://www.greenbuildingadvisor.com/blogs/dept/musings/innie-windows-or-...) or do i need to use 2x4 window jambs and construct the plywood box?

thanks for your assistance,
jbo

In Green building techniques | Asked By jack ostrick | Apr 14 11
13 Answers

Dear GBA,

I have been called in for several energy audits on individual apartments within high density residential high rises. Customer complaints are typically the standard: comfort issues and excessively high utility bills.

The apartments typically have highly conductive metal window frames and PTAC's for the heating and cooling.

In Energy efficiency and durability | Asked By Art Vandelay, AIA/LEED AP+ | Jan 19 11
2 Answers

I am currently dealing with the aftermath of Hurricane Irene and have a question about my flooded crawl space and the insulation of the floor above it. . I live in in a beach community in the Northeast and and consider myself lucky that only my crawl space got flooded. My crawl space is about 4 - 4 1/2 feet high with concrete floors. It runs the whole footprint of the house so it is almost 2100 sq. ft and I do not think it is vented. Nothing is down there except my heating/cooling furnace, air vents (which are wrapped in insulation) and water pipes.

In General questions | Asked By Nina Kanter | Aug 31 11
11 Answers

Facts: The house in question is (3) story 4,800 sqft, designed with R-43 walls, R-60 ceiling, R-29 basement (where sub grade, the rest is R-43 at walk-out) and sub slab insulation is R-19. The slab is to be 4-inch. The location is Newbury, NH (Zone-6) I would like to address summer time humidity concern by installing a Thermastor ("Sante Fe") unit in the basement Utility Rm. My son, who works for Thermastor has a similar set up in his Madison, WI house and he observed 70% humidity at the 2nd floor was reduced to 50% within a day (maybe less).

In GBA Pro help | Asked By Harry Seidel | Aug 25 11
Register for a free account and join the conversation


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