General Questions
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Thermobuilt Casualty
I started out with a dream to retire to a home where we could live inexpensively, and generate our own energy. My dream is in serious jeopardy because I trusted…
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Wise to use two different insulation approaches in same space?
Hi all,I'm renovating/retrofitting a cabin in the Catsklls area and have questions about the insulation method proposed by the architect. We are adding an extension to the cabin, among other…
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parging for slab edge insulation
My plan calls for rigid foam insulation on the slab edge, covered by 1/4" of parging. In order to get the right thickness I'm using courses of two different insulation…
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Can I leave part of basement wall un-insulated?
I'm insulating my basement walls with rigid foam panels. My heat pump water heater sits in a little bay, where it is positioned so that there is not enough room…
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How to straighten coiled, thick (4/0) aluminum electrical wire?
I bought 144' of 4/0 AWG aluminum XHHW-2 wire (roughly 0.6" diameter) that came in a coil. Probably because I didn't unroll it the right way, it has the shape…
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What is Calculating minisplit COP?
I live in north NH (zone 4a) and recently had a Mitsubishi MXZ-36NAHZ hyper heat pump with 5 ductless indoor units installed at/in my home.
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check my math for slab heat loss?
Trying to decide between R22 and R33 options of under slab insulation for my workshop. After trying a couple of web based calculators that spat out nonsense numbers, I decided…
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Reliable calculator for roof assembly R values?
I was recently mislead by an assembly R value calculator on an insulation company's website. Surprising because the data wasn't skewed in their favor, but looks like the flaw was…
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Poly or Intello interior vapour barrier?
We just started installing 6 mil pol as our interior vapour control layer in a new build project. Originally it was to be Intello as per architect. Builder switched to…
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Commercial Addition to Floating Slab Structure
A client is asking me to design an addition of a 60'x 30' warehouse structure to an existing 40'x 30' commercial structure. They drive forklifts inside, and need the slab…