From the category archives:

envelope

Blown In Cellulose – The Ultimate “Green” Insulation?

August 16, 2010

In my last post about super-insulated wall assemblies, I referenced a future post about the superiority of Dense-pack Blown-in Cellulose insulation over other insulating products. Well, this is that post. We’ve talked about insulation in the past, but after extensive research and pitches from other insulation fanatics we’d like to put Cellulose in the spotlight [...]

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Most Affordable & Effective Super-Insulated Wall Assembly?

July 16, 2010

You know by now that we’re all about finding the best bang for our buck when it comes to energy efficient construction. That’s how this whole thing started. It’s been a while since we’ve posted on advancements in our building philosophy, so why not talk about our next super-insulated wall assembly that we think could [...]

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The Vented Rain Screen via Furring Master

May 14, 2010

It occurred to me that we haven’t really written a good post dedicated to vented rain screen assemblies. A rain screen is basically a gap created in between the sheathing of a house and the exterior cladding. It is considered by most building experts to be the most durable method of building an exterior wall [...]

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ZIP & SIS – Multi-Functional Sheathing

May 3, 2010

If you’ve been following us for a while, you probably know we’re big fans of building products that serve multiple purposes. Today we look at versatile sheathing products that go beyond simple structural support and contribute to the “Hybrid Prefab” method of building that we continually strive for. We’ll take a look at two products: [...]

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Quick Air Sealing Strategy Notes

April 8, 2010

As we build the Skinny Project, we are taking care with all of our air sealing details and making notes on possible changes to reduce labor and complexity in all future homes. One of the key notes I picked up at last year’s Passive House Conference was that those who had been actually building these [...]

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Moving from SIPs to Double Stud Walls in Skinny

February 25, 2010

In our first few projects at Postgreen, we used EPS SIPs (Structurally Insulated Panels) for our exterior walls and roofs which were very popular with the kids. We have decided to move away from SIPs in the Skinny Project in favor of using Advanced Framing Techniques and a Double Stud Wall design. Many of you [...]

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Building Gaskets and Air Sealing Tape

October 30, 2009

Yesterday we looked at some lessons learned from our aggressive air sealing goals on the Passive Project. In doing so we mentioned that we will be utilizing building gaskets and air sealing tape to help obtain the very difficult building air tightness goal of 0.6 ACH @ 50Pa that is required by the Passive House [...]

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Passive House Air Sealing – Lessons Learned

October 28, 2009

It’s been a while since we posted on any technical aspects of the Passive House we are trying to build in the Passive Project. We recently tested our air sealing with a blower door test prior to drywall at the homes and I figured it would be a good time to bring up some thoughts [...]

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Super Efficient Windows for the Passive Project

September 11, 2009

In addition to insulation levels and air sealing details, the windows and external window shading in the Passive Project is upgraded from the 100K House Project. There is a lot more to windows than insulation levels, but in order to keep things simple we will focus on this aspect and cover energy efficient windows in [...]

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Passive Project Foundation and Slab Insulation

June 11, 2009

Many have been waiting for us to start posting on specifics of our Passive Project which contains two homes – one of which is seeking the stringent Passive House certification for extreme energy efficiency. We have been waiting to post until we have completed each section of the build. This ensures that we post once [...]

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