Community: General questions

Q & A Instructions

[Click map to enlarge]

The web site has a wealth of articles on a wide variety of construction topics. Before posting your question, you may want to check out the articles on this page: How To Do Everything. You just might discover an article there that provides the information you seek.

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

If you want to post a question, 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!

0 Answers

Open cell Foam on Attic Floor

My house is about 10 years old and the attic floor has open cell spray foam. There are places where the foam is only 3-4 inches thick. I am considering adding 10+ inches of cellulose on top of the open cell. Will that cause problems with moisture? The makeup of the ceiling is painted sheetrock, ceiling joists with cavities filled with open cell in a vented attic space. I am in the upper most top of zone 4 in Arkansas. I've done a lot of research in here and on the internet but everything i've read is directed at closed cell on the attic floor. Your thoughts and ideas please?

Asked By David Coker | Nov 24 17
0 Answers

What are some of the engineering considerations when evaluating fibreglass window frame profiles

My wife and I building a passive solar house in Eastern Ontario. Many of the articles on GBA have convinced me that fibreglass triple pane windows are the correct way to proceed.

What are some of the design considerations when choosing the best pulltruded frame profile? Some use a closed back or hollow frame and others are open back.

Though counter intuitive, the open back windows have better u factors. It would seem to me that the closed back frames are more rigid and stable, therefore allowing the locks and slides to perform better.

Asked By Michael Madore | Nov 23 17
0 Answers

Brick Foundation Questions

I just want to say I've been reading through a number of different articles on this site and it's an incredible amount of information. Many thanks to Martin and other contributors for offering these resources.

Asked By user-6953713 | Nov 23 17
5 Answers

How best to prevent freezing pipes?

I'm working on a (mostly) vacant house near Atlanta. It's on a vented crawlspace and has only electric resistance (baseboard) heat. What combination of heat and dripping water is the least environmentally damaging way to prevent water pipes from freezing this winter?

Asked By Charles Campbell | Nov 22 17
11 Answers

Region 5 below grade basement insulation techniques with intention to finish

I've probably read most or all of the articles on the subject 5-6 times over, but am still left with many questions as the advice can quickly change as the circumstances do, and it's difficult to keep track of all these factors.

My goal is to finish my below grade basement in 18301 Region 5. Cape cod style home built in 1968. 954 sq ft basement.

Asked By Ryan O'Rourke | Nov 19 17
6 Answers

Carpet on concrete slab--vapor barrier?

We are working on a :budget restricted" fix-up of a house near Dayton, Ohio (Zone 5). The house is slab-on-grade with solid masonry walls (we are adding 1.5" of polyioso to the interior of them). The floor is concrete slab on grade, and has had asbestos and then vinyl tiles applied to it in the past, and most recently had carpet over this. When I tore out the old carpet it was quite filthy, but I can't say I saw any visible mold, etc. on the surface or backing.
Approximately 75% of the slab is covered with these tiles, and the rest has various amounts of mastic or glue.

Asked By Mark Waldron | Nov 20 17
4 Answers

Sliding patio door track

I have a question regarding our sliding patio door. We had hard driving rain over the weekend. I noticed a small amount of rain water in the track of the sliding glass door. Not much, was able to wipe up with a paper towel.
Should rain water be on the interior side of the sliding door track? According to comments from the manufacturer, the answer is yes. Just doesn't seem right to me.

Asked By Birdie L | Nov 20 17
5 Answers

Foil vs Bubble Foil or Foam Foil

Hi I'm insulating a shed-like structure on my property to create a comfortable living space. With regard to the tin roof I've been advised to use a layer of Bubble foil on the battens directly underneath the tin and then below that in the remaining ceiling space (above the plasterboard) Fibreglass batts. My question is: In this kind of context will bubble foil give an improved insulating performance over and above foil (sisilation) on it's own directly under the tin? i.e. Is bubble foil worthy of the added cost??

Asked By AussieQ | Nov 15 17
11 Answers

Sizing a ductless minisplit for heating

Hi all,

I'm going to install a ductless heat pump. I settled on LG Art Cool Premier (HYV1 or HYV2). Now I need to figure out system size, and there is too much info.

I have 550 sf addition built in late '80s, which is a split lever open space, and is VERY cold (i've attached some photos)!

It has a large french door (8x10' glass, 3 sections), 7 windows, and 5 skylights. All are double glass.

Asked By Levab | Nov 16 17
5 Answers

Water pipes under exterior foam?

I’m in Climate Zone 2B and live in a house with slump block walls and a flat roof w/ no attic. The house was re-plumbed by the previous owner by running the water lines across the roof. With radiant losses, the roof gets cold enough to risk freezing the pipes 20-30 nights a year. Standard box store pipe wrap was not sufficient to keep the pipes from freezing.

Asked By Nick Van Kleeck | Nov 6 17
Register for a free account and join the conversation

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

купить кроссовки

別れさせ屋 山梨