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2 Answers

Rigid Foam

I'm need to insulate my second floor cathedral garage ceiling and live in upstate NY. It has 2x10 joists and I want to get the most bang for my buck. I've looked at closed cell spray foam and its just not in the budget. So my plan is to use 1 inch rigid foam with a 1 inch gap to create my baffles, then use Roxul R30 that should fill the 9.25 cavity perfect to give me a estimated R rating of about 35 and then cover it with OSB. My question is do I need a vapor barrier in between the studs and the interior OSB?

In General questions | Asked By Steven Miller | Feb 25 17
6 Answers

How to insulate a shipping container home?

I would like to understand how to best insulate a shipping container home. i am thinking of building on a pier system.

Specifically I am wondering about the double sided foil such as Radiant guard that comes in both permeable and vapor barrier. Which do I put on the inside and which goes on the outside. I live in the Seattle area Marine Zone 4-5.

In Energy efficiency and durability | Asked By SirKoda | Feb 24 17
6 Answers

Hydronic Heating System Hydraulic Buffer Tank vs Hydraulic Seperator

This question might be more appropriate in a plumbing forum but I have had such great and thoughtful responses in the GBA forums I look to here first. This is also a hydronic heating mainstream topic which should be appropriate for GBA.

In Mechanicals | Asked By Roger Smith | Feb 26 17
4 Answers

Load Specs- understanding manufacturer's fastener spec

Hello again GBAer's

I'm having trouble interpreting a load spec for a Simpson fastener (SDWS221000DB). Looking at a table that addresses my specific application (furring strip on 6" of exterior board foam insulation, 16" studs), the heading of the table reads:

"Maximum Allowable Cladding Weight to be Supported (psf)"

This seems fairly clear, except doesn't 'psf' refer to a _pressure_? But this wouldn't make much sense.

In General questions | Asked By Gerald Pehl | Feb 26 17
2 Answers

Insulation for finishing my basement

Hello all,

In General questions | Asked By abtesnow | Feb 27 17
4 Answers

How to get notifications from comments

Hello GBA.

I'm getting notifications of comments to questions that I ask, but I'd also like to get notifications when from _other_ threads, especially threads that I comment on.

Is there a way to do that?

Thanks in advance!

In General questions | Asked By Gerald Pehl | Feb 19 17
19 Answers

Installing LP Smartside over foam and 24 inch centers

We’re building a new home (SW Virginia) with 2x6 studs on 24 inch centers. We had hoped to use 1.5 to 2 inches of EPS rigid foam to the exterior of the sheathing, then 3/4 inch x 4 inch plywood furring strips, then LP Smartside lap siding. We knew we had to use the 76 series Smartside product for the 24 inch centers. Then I discovered that LP’s installation instructions specify 1.5 inch x 3.5 inch furring strips for foam greater than 1 inch in thickness, so I guess that would basically mean a 2 x 4 stud for every 2x6 stud in the wall.

In Green building techniques | Asked By William Costello | Feb 17 17
4 Answers

Heating and insulating for a wide interior temperature swing

I'm planning out my garage, which will be mostly for cars and storage. I may install a small mini-split or PTAC to keep the garage above freezing, and to occasionally cool the building if I'm working in it in the summer.

I've got a couple questions:

Is there any green motivation for insulating the building beyond what fits in the stud-bays (2x6 likely), given that I'm letting the temperature swing widely?

Is there any issue with operating a mini-split with a 40F building temperature?

Are there any vapor management concerns for a building that has wide interior temperature swings?

In Energy efficiency and durability | Asked By John Ranson | Feb 26 17
3 Answers

Homemade walk-in cooler

I'm about to build a 10'x14'x8' cooler for my farm, using a 24,000btu window unit and a CoolBot to reach a temperature of 40-45F. I'm using layers of 2" eps rigid foam with foil backer (it was the best deal I could find on Craigslist) to reach a minimum of r-25 throughout, and 15 mil plastic as a vapor barrier.
First question: should the insulation be on the interior of the framed walls and vapor barrier over the insulation, or vapor barrier then insulation.
Second question: is there a way to build a foundation below grade--to avoid any steps-- without pouring concrete?

In General questions | Asked By Matthew Ervin | Feb 25 17
3 Answers

Insulating a garage

I am seriously considering converting my garage into a workshop that I want to use year round. It is cement block construction and I would like recommendations on insulating the walls. I will probably drywalling after and then installing shelving etc. Thanks

In Energy efficiency and durability | Asked By JATotter | Feb 26 17
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