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1 Answer

Flat roof venting

I am building a house in WV with a 3 FT height flat roof attic. The 18" trusses are up and had them put an "attic foil" below the roof sheating. My HVAC and water pipes will be below the trusses. There is a 3 Ft. roof hangover surrounding the house. WHAT IS THE BEST WAY TO INSULATE THIS ATTIC.
My contractor is planning to put the fiberglass insulation in the trusses. Can he do that ?

In General questions | Asked By Cherry Lobaton | Nov 19 12
8 Answers


Here's what I would like to do. I want to install roofing felt, then 2" pink foam board and cover it all with house wrap. Then install vinyl siding. Can I do this?

In Green building techniques | Asked By dale nettleton | Nov 19 12
1 Answer

Restored steel casement window solutions?

After doing some thermal investigation, I have restored a bunch of late '50s steel casement windows for use on an addition. I had found a place, Innerglass, that made interior, spring loading, storm windows that sounded like they would take my casements from beautiful to practical.

However, recently I have read about "magnetic bellow" design window inserts, so I am looking for advice.

I live in central Illinois. Lots of the casements will be facing south. I know these windows arent the smart choice, but I really like them.

In Energy efficiency and durability | Asked By sarah mccutcheon | Nov 14 12
4 Answers

Will vapor barrier paint on the ceilings prevent most of the air and moisture migration from the living space into the attic?

My house (currently being constructed in SW Colorado) will have Sheetrock walls and ceilings throughout. Will vapor barrier paint on the ceilings prevent most of the air and moisture migration from the living space into the attic?

There are several dropped ceiling soffits wrapped in sheetrock. If I paint these per above, and fill the inside cavity with the same blown-in insulation used throughout the attic (R60 cellulose), will I need to do any further sealing of the soffits?

Thanks for any help or suggestions!

In Energy efficiency and durability | Asked By Donald Bradley | Nov 18 12
1 Answer

How much blown-in cellulose can you put on top of a 5/8" drywall ceiling?

I have trusses on 24 inch centers and plan on at least 12 inches of cellulose. When do you have to use something stronger like OSB and how is it finished?

In Green building techniques | Asked By larry ogden | Nov 17 12
1 Answer

Is N type mortar a good substitute for lime based mortar?

I have an old brick house built in 1915. In some places the bricks are so water damaged that they are deteriorating and turn to sand when touched. I'm about to get a lot of brick work done to the house.

1- I'm getting the front wall pointed--these bricks are actually in okay condition but they absorb water which is ruining the interior plaster walls.

In GBA Pro help | Asked By Mary Farrah | Nov 17 12
1 Answer

Is there a detail drawing on how to install cast natural stones over 2 layers of 1 inch rigid foam with 1x4 vert. fur strips?

i have a split level home and under the cantilever portion of house was going to install the stone rock. the rest of the house has fiber cement siding .with two ,one inch layers of rigid foam

In Green building techniques | Asked By richard friend | Nov 17 12
1 Answer

Hot water heaters in series, but first tank has other parallel feeds

I am getting a home built that has two separate water usage areas separated by a wide living area. I am likely going to go with propane tank style heaters since the tankless units (and their installation) cost so much. I want to do a 40-gallon over the master and kids bathroom. Then another 40 gallon on the opposite side of the house for the kitchen, laundy, and guest bath.

What I want to do is fill the one over the master with hot water coming from the kitchen tank. However, the kitchen would also supply, in parallel, all of its own dedicated taps (kitchen, laundry, and guest).

In Mechanicals | Asked By Dustin Gohmert | Nov 17 12
7 Answers

Foam Board insulation between attic joists?

Hello, First thanks for providing this site, and the Q/A forum. I spent the last week reading through all of the blogs, and think I have a much better plan for beginning to insulate/ air seal my 1930's craftsman/ cottage house.

I have the ability to get free / very cheap 4x8 foam board insulation. ( not styrofoam, either pink or blue iso board) I'm not exactly sure on the type(s) at this time.

In Energy efficiency and durability | Asked By Casey M | Jul 29 11
9 Answers

Comparison of insulation price per sq. ft. per R-1

One would think there should be a chart that compares the range of cost between different types of insulation (per sq. ft. per R-1). However, I haven't come across any reference.

Does anyone know a range of the prices off the top off their head for various types of wall insulation (polyiso, EPS, XPS, cellulose)? I know prices can vary wildly within a city and what volume your are purchasing, but I'm guessing that there are some rules of thumb that builders tend to go with.


In Green products and materials | Asked By Kristopher Steege-Reimann | Nov 15 12
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