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PassivHaus is a standard of construction that yields extremely tight envelopes and low energy use.

The PassivHaus Institute is in Germany, but we have a branch here in North America as well, Passive House Institute US

7 Answers

Closed-cell spray foam versus dense-packed cellulose - Noise control in a PassivHaus

This is a comment rather than a question.

In our pre-certified PassivHaus in northern NJ, we have 10-inches of densepack cellulose and 2-inches EPS in the walls, and 10-inches of closed-cell spray foam in the roof.

We've noticed that the noise attenuation through the walls is much greater than through the roof.

Most of the noise getting into the attic comes through the roof, which is asphalt shingle over plywood decking on 2x12 rafters, with the space between the rafters filled with 10-inches of the closed-cell spray foam.

Asked By Len Moskowitz | Oct 15 14
1 Answer

What is the best ventilation system for a passive design cafe/restaurant?

We are trying to design a passive cafe/restaurant building and i want to know the best ventilation system to use for the building please.

Asked By monita taghva | Oct 20 14
5 Answers

Retrofitting new wall inside existing frame

I have an interesting challenge in my 1941 1500SQFT energy retrofit in Minneapolis (Zone 6-7). I want to maximize realistic R-value while preserving the existing siding and sheathing, which we can assume has no vapor barrier (this will be verified when we open it up). While I would normally prefer to wrap the exterior, this is not possible at this time. There is no historic value to the plaster/sheetrock, and we're demoing kitchen and bath anyway, so I intend to do all insulation from the inside. The home is all 2x4 16"OC construction with old yellow fiberglass batts.

Asked By Ryan Griffin | Oct 8 14
7 Answers

US triple pane with uncoated glass?

I've been thinking that for the shaded south side of my Minneapolis home, triple panes with no Low-E coating might be best. I'm looking for a US made window that's decently insulated with high SHGC. I've asked a few manufacturers if they would make me a triple pane with clear glass, but I haven't found anyone willing to do this. Would I be giving up too much insulating performance (or interior heat reflectivity) with clear glass, and is the a US maker who will do this?

Thanks,
Ryan

Asked By Ryan Griffin | Oct 5 14
1 Answer

How to protect a shallow monolithic footer during winter construction, zone 5

We have a Passive House design, which includes a shallow and 1'4'' wide mono footer. 4'' floating slab has 12'' deep thickened edges. 12'' under the slab are insulated. There are 4'' of EPS on all 3 sides of the footer. (see detail/picture).

Asked By Lucyna de Barbaro | Oct 1 14
18 Answers

Detail and Insulation Review

We are looking to do REMOTE wall construction on our new house located in S.E. Michigan. Currently drawn as 2" exterior rigid foam, but 3" will probably be the the correct amount to use. I plan to use Bituthene as the WRB, not sure if anyone can recommend any alternatives? I really like Bituthene's low perms and low cost, but I assume that asphalt products aren't all that green....

Asked By Eric Burhop | Jul 31 13
18 Answers

Detail and Insulation Review

We are looking to do REMOTE wall construction on our new house located in S.E. Michigan. Currently drawn as 2" exterior rigid foam, but 3" will probably be the the correct amount to use. I plan to use Bituthene as the WRB, not sure if anyone can recommend any alternatives? I really like Bituthene's low perms and low cost, but I assume that asphalt products aren't all that green....

Asked By Eric Burhop | Jul 31 13
2 Answers

How to handle SE/SW orientation? And any experiences with Richlin windows?

I'm planning a not-quite almost-passive retrofit to a 1,400 sq. ft. 1-1/2 story Cape Cod in Minneapolis (shooting for R-40 walls & R-50-80 roof). I'm looking for a US window manufacturer who can come close to European quality without the high cost, lead time and shipping impact. Oh yeah, and the windows must be standard crank-out casement as I have no interest in tilt / turn (I've used them plenty in Europe).

Asked By Ryan Griffin | Sep 30 14
15 Answers

American-made Passivhaus-certified windows

Hello All,

Asked By Bob Holloway | Sep 23 14
5 Answers

Blower door test cost

Not including the cost of the blower door test itself, I am looking for a ROM materials and labor cost per ft-2 to seal up a conventional 2 x 4 framed house, sheathed, sided, windows, doors, stud bays, lid, etc.....?

If someone that has done it can estimate labor hours to get to 5-7 ACH-@ 50 I can factor my local labor rate. Please include the trail and errors, IR and smoke back and forth, etc. Or if you sealed up some ft-2 home let me know how long it took...

Thanks!

Asked By Terry Lee | Aug 20 14
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