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5 Answers

"Picture framing" the stud bays with Knauff Ecoseal

Knauff seems to recommend "picture framing" the stud bays to the sheathing with their Ecoseal product. Is there a real benefit to this or does it just sell more of their product?

In Energy efficiency and durability | Asked By Norman Bunn | Oct 6 17
4 Answers

We want to spray our basement ceiling rafters black. We also want to sound insulate using spray on foam between rafters.

My question is can we paint the sprayed on insulation and will paint stick to it.

In General questions | Asked By boese | Oct 9 17
2 Answers

About Net Zero

I live in Michigan. I have solar panels that supply most of my electric needs, with easy expansion capabilities. As electricity is necessary for me at all times (I live in an area with a high water table and a sump), so far I have remained grid-tied and have a whole-house automatic propane generator for outages.

In General questions | Asked By Lynn Cummings | Oct 9 17
4 Answers

Programmable thermostat recommendation?

My ranch house in Northern Idaho will have a natural gas fired in-floor hydronic heating system. I also added one zone mini split for A/C needs, but this could also make sense to run during shoulder heating seasons. I've installed a PV system that will produce excess power during most of the year, so at times the electricity to run the mini-split will be "free". It gets complicated.

Any recommendations on a programmable thermostat to use with this set up? I can envision control algorithms using outside temperature and time of day.

In Energy efficiency and durability | Asked By Steve Wolfe | Oct 8 17
3 Answers

Attic floor insulation and vapor barrier with phased construction

I'm looking for help on an attic floor assembly. This is new construction where the attic will not be finished right away. It could remain unfinished for 5 years. I want to install the insulation and vapor barrier to perform correctly for both an unfished and finshed attic detail. I want to make sure the assembly is drying to the correct side.

I have attached a pdf to show the assembly.

In Green building techniques | Asked By Seth Holmen | Oct 9 17
3 Answers

I've heard that some heat recovery ventilators produce ozone. Is that true, and if so how?

How can you know you are buying one that doesn't?

In Mechanicals | Asked By mark romwalter | Oct 8 17
1 Answer

What are my options for attaching and protecting foam insulation to exterior concrete basement walls?

I live in an area of frequent freeze/thaw. basement walls have foam insulation that has detached in some places, and has just generally degraded over the past 10-15 years.

In General questions | Asked By user-6932004 | Oct 9 17
4 Answers

XPS on ridge beam

I insulated my basement walls with 2” XPS including cut and cobbling foam on to the ridge beam. The walls will be frammed and finished with wallboard. But do I need to also put drywall over the foam in the ridge beam to meet code?

In Building Code Questions | Asked By adam stanton | Oct 7 17
4 Answers

SIP Wall to Gable Corner Question

I am curious to hear if how a design pro might approach a SIP Wall corner at the gable end of a house. I have 2 choices as to whether to run the wall panel long or the gable panel long. Just curious to hear what the advantages to each approach might be. I don't think either approach is structurally any different but there might be a difference that is not readily apparent to me. SIP mfg hasn't been too helpful in elucidating the pros and cons.

Thanks in advance for any thoughts.

In Green building techniques | Asked By John Brown | Oct 8 17
1 Answer

Leakage around windows and doors under housewrap

I am using osb sheathing as my primary air barrier and have caulked all panel edges before install along with taping seams with 8067 all weather flashing tape. Around the window and door openings I am also taping the osb to the framing. Tyvek will be installed and wrapped into window openings using the "inverted wineglass" technique. It seems, however, that unless I seal the tyvek to the rough opening framing, that air can leak through on the back side of the tyvek, even when the flanged window is installed, flashed, and caulked correctly.

In Energy efficiency and durability | Asked By Brett Greenburg | Oct 9 17
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