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6 Answers

A wall with EIFS and SIS — What's the vapor profile?

I need a little help with a wall detail, for a three story house we're building in Arlington VA, Zone 4a mixed humid.

The lower 2/3 of the wall will be clad with EIFS. The upper 1/3 will be clad with a cementitious shake panel. The two finishes are separated by a water-table/apron like trim detail. 1" XPS will be continuous over the SIS on 2x6 framing with blown cellulose inclosed with ADA drywall. Cementous shake installed with rain screen, firring strips over XPS, flashed over the water-table trim.

In GBA Pro help | Asked By Mac Snelgrove | Aug 13 12
4 Answers

Ridge Vent Filter Question

I have a ridge vent that also has a "weather filter" I contacted the manufacturer and asked them what the felt filter does and they indicated that it keeps the "garbage out." My filter appears to be blocked by dust and it is ripped in several places. I am wondering if I should just rip it out since it looks to be blocked anyways. What would you all recommend, and is this filter very important? I am in zone 6. Thanks!

In General questions | Asked By Rocky Pembroke | Aug 13 12
4 Answers

New foundation installed under old house

We bought a house two years ago that sits on a shallow stone foundation with vented crawlspace, which until recently was only 0-12 inches deep. It has all the problems you'd expect from this setup--cold floors, musty smell, easy access for critters, rotted sills, etc. We had it vacuum excavated a couple of feet in order to gain access for installing vapor barrier on the ground and insulation between floor joist.

In Energy efficiency and durability | Asked By Steven O'Neil | Aug 13 12
1 Answer

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In General questions | Asked By Ken Levenson | Aug 10 12
1 Answer

Radon Mitigation vent into plumbing vent?

Is it an acceptable practice to install, in the attic space, a wye on the plumbing stack, and run the radon stack into it, thereby saving one roof penetration? This is a new build in zone 5.THX!

In Building Code Questions | Asked By steven bumpus | Aug 11 12
3 Answers

Insulating Scissor trusses without raised heel

I have a 12" addition on the back of my house that was built with scissor trussed without the raised heal. Near the exterior walls I only have 3 1/2 or less insulation. I live in Central New York and get over 200" of snow almost every winter. this is causing ice dams and leaks. I plan on stripping the current shingles. Then spraying DOW Froth Pak 200 Foam Insulation through small hole to fill the whole cavity. Then cover the sheathing with 2" of Polyisocyanurate Insulated Sheathing. Screw on 3/4" furring strips to the trusses for venting Re sheath the roof with plywood and shingle.

In Energy efficiency and durability | Asked By greg bailey | Aug 12 12
6 Answers

Did we just make a mistake by insulating no-paper stucco walls?

Did we just make a big mistake? The house has stucco walls with various hairline cracks. We had cellulose insulation blown in. The house was built in 1938, and the building paper is completely gone... we can only find scraps of the stuff. The sheathing is fir boards.

Will the cellulose grab water that otherwise would have dried, resulting in wetter wall cavities?

Climate: California fog coastal. Dry summers. Rain in winter. Fog frequently.

In Energy efficiency and durability | Asked By Bryce Nesbitt | Aug 8 12
6 Answers

Will positive pressure work to vent an attic (i.e., blowing air in)? Attics exhaust fans are a bad idea. But what about blowing air in (using positive pressure).

My father is interested in removing heat from his attic to try to keep the upstairs of his house somewhat cooler. I have advised him that generally speaking, attic fans are a bad idea, which he has come to terms with. However, with that understanding that creating negative pressure in the attic can cause all kinds of problems (sucking out air from the conditioned space, possible back-drafting of combustion appliances, etc.), he has come up with the idea to blow air into the attic instead (i.e., creating positive pressure) to force the hot air out.

In Energy efficiency and durability | Asked By Erica Downs | Aug 12 12
3 Answers

What happened to the Q & A??

Q and A disappeared from the web site

In General questions | Asked By Elizabeth Kormos | Aug 12 12
4 Answers

How can I get high SHGC low E glazing in windows or doors? Cardinal won't provide their 180 glass in southern California.

Anyone know a glazing referral here or window manufacturer or vendor with hopefully a fiberglass line who can get and install this glazing in southern California?

In Green products and materials | Asked By Lisa Young | Aug 9 12
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