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1 Answer

Fresh air intake filters

Hello,

I have the RecoupAerator ERV that I am in the process of getting installed. I have some sheet metal/duct people coming next week to give me estimates on installing the fresh air intake duct that will terminate thru an exterior soffit.

The RecoupAerator comes with MERV 12 filtration material inside, but I am wondering how to filter the air at the entry point into the fresh air intake duct. A simple insect screen there might still let small bugs and such into the the duct work where they will decompose.

In GBA Pro help | Asked By Venkat Y | Sep 20 14
5 Answers

Best time to stop construction for winter..?

It looks like our builder has overbooked himself and will very likely not be able to put the house under the roof+finish exterior before winter. We understand that one could continue to work in winter, through all stages of construction if additional measures like heating tents are used when applying exterior EIFS stucco. So the problem here has to do with management of resources and time rather than the physical limitations. Nevertheless, we face these choices:
1) don't start until next spring (bank funding would be lost and we'd have to re-apply)

In General questions | Asked By Lucyna de Barbaro | Sep 20 14
3 Answers

The joys of insulating...

What is the best way to insulate around the corners of rigid round duct using foil-faced blanket type duct insulation?

Make a "sock" and coax it around the corners and don't worry about bunching?

Snip out pieces and try to form something like an elbow while generally making a mess and wasting time?

Something else?

In Green building techniques | Asked By Lucas Durand - 7A | Sep 19 14
2 Answers

Woodpeckers, Stucco + Exterior Foam with Rainscreen

Our client has requested to change the exterior wall cladding from from smooth panel cement board to acrylic stucco mainly for aesthetic reasons (eliminates corner trims, battens, etc.). Woodpeckers are a real concern in the area and when they knock on stucco with foam behind it sounds hollow so they keep digging.

First up, the proposed wall assembly: (BC Interior Climate Zone 6)

5/8" GWB
Membain vapour retarder
2x6" Studs @ 24" of
R22 Fiberglass Batt Insulation
3/8" OSB Sheathing
Tyvek WRB
2 Layers of 1" Type 2 EPS with staggered joints and taped seams on outside layer

In Green building techniques | Asked By Brett Sichello | Sep 20 14
1 Answer

Insulating Cantilever Space Containing Water Pipes Zone 4A No. VA

I am wondering what is the best way to insulate a cantilever space containing hot/cold supply pipes and a bathroom exhaust vent. Above the cantilever is a bathroom, below is the entrance to my house and on the inside another bathroom. Currently there is only fiberglass, no blocking, no foam, no sealants. The pipes have been there since 1984 and since I live in a middle unit townhouse they will not be moved.

In Energy efficiency and durability | Asked By Alex Chandler | Sep 20 14
4 Answers

Air and moisture proofing

I am going to be renovating a 1950’s house in Toronto, ON. It’s a 1 ½ storey that we are making 2 storey with adding addition on the back and attached garage. The plan for the 2nd storey is wrap the outside in Blueskin then cover in 3” Roxul Comfortboard IS, Strap and vinyl side. 3 of the 1st floor brick walls are to be left in place, which I also want to cover in 3” Roxul strap and vinyl side, but unsure what to use under it to keep the air and moisture out.

In Energy efficiency and durability | Asked By Dave B | Sep 18 14
3 Answers

Seeking underlayment material for exterior wall shingles.

I own a home built in 1965. It has cedar shingles as the exterior wall surface. I will be rebuilding a section of one wall as part of a project to replace a rotted window.

The problem is that the original construction includes a material that I can't find, and I'm not sure what could be used as a substitute.

In Green products and materials | Asked By Don Boettger | Sep 18 14
2 Answers

Sheathing at the ridge vent

I have a 12 pitch roof with 24 OC tji rafters and 5/8 deck membrane I have a 1.5 inch air channel between the rafters that vents along a continuous ridge vent. The sheathing sets back from the ridge 2". How do I attach the sheathing membrane at the ridge set back (other than the 24 OC rafters) without impeding the air flow? Is there a metal, inverted 'U' shaped bracket that I can screw the deck to? Left unattached, compromises my shear value and will eventually sag.

In General questions | Asked By Ron Walashek | Sep 19 14
3 Answers

Insulating and air-sealing a room-in-truss over a garage

Hello,
I am looking for some clarification on insulation and air-sealing, when dealing with room-in-truss construction for a conditioned space over a garage.
I live in Michigan, climate zone 5. I have a 28x36 garage, with 28ft span 8/12pitch "attic" trusses. the trusses have a 2x10 bottom chord and 2x8 top chords with 2x4's at the kneewall. I have a permanent stairwell going to the room in the truss, and I plan to heat the room. I have in-slab hydronic heating on the garage floor.

In Energy efficiency and durability | Asked By Ben Helmreich | Sep 15 14
2 Answers

Looking for guidance on how to downsize in a green way

Hello. Am looking for some guidance. My husband and I want to sell our current home and downsize to something smaller and greener. Our budget is pretty limited, though, so we're trying to figure out what the best options may be. We will likely have to pay a fair amount just to get out of our current mortgage, pay closing costs, etc. Then we've been approved for a 150,000 mortgage and with that we could:

a. buy an existing smaller home, close to nature (though those seem very hard to find in our budget)
b. buy land and put up a modular home

In GBA Pro help | Asked By Jen Yost | Sep 19 14
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