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6 Answers

Ridge vents: are they susceptible to snow drifts and driving rain?

My current design incorporates ridge vents with simple gable roofs (both house and garage).

It seemed to be both the aesthetic and performance choice. I will be using standing seam steel roofing, which seems to have a very water tight ridge vent design.

In GBA Pro help | Asked By Mai Tai | Aug 17 17
4 Answers

Low-slope roof

I am building a PGH and I have a 32' run of unvented, low-slope roof that we will start framing out shortly. The interior stack-up is gypsum, 2x3 service cavity, Siga Majrex air and vapor control layer (let's vapor out of the cavity, but not in), 2x12 joists, dense pack cellulose between joists, 3/4" Advantech seams taped with Wigluv. I was planning on using a unvented nailbase product that has 4.5" of polyiso with a layer 1/2" osb attached to the top. I am in Zone 4 and this will provide more than the required .31% of exterior to total r-value even if I de-rate the polyiso r-value to 5.

In Energy efficiency and durability | Asked By Jonathan Lawrence CZ 4A New Jersey | Aug 18 17
28 Answers

What heating system should I install in my 150-year-old house in Connecticut? Oil boiler, ductless minisplit, or something else?

My family lives in a 2-story 2000-sq.ft. balloon-framed house in Western Connecticut (zone 5A). We currently heat exclusively with a Harman XXV pellet stove, which surprisingly keeps most of our house pretty comfortable even in the depths of our cold New England winters. Of course there are some rooms that will get down below 60 on the coldest of nights, but that just means we stay in the warm parts of the house, which works fine for us. We used to heat with a Burnham RS-111 oil-fired boiler piped through about a dozen beautiful and massive cast-iron radiators.

In Mechanicals | Asked By Rob Wotzak | Nov 9 14
1 Answer

Chimney chase insulation

I have read a lot of articles and forum posts about this, but there is not a lot of consensus, and each answer seems very case specific. So, here is my case! I am installing a RSF Focus 320 [Editor's note: This is a manufactured fireplace with a glass door; the fireplace is designed to burn wood.] in a new construction home in NC with outside combustion air and a hookup to our HVAC system for distributing heat.
http://rsf-fireplaces.com/en/focus-320-woodburning-fireplace#mc

In Energy efficiency and durability | Asked By Kevin Spellman | Aug 18 17
4 Answers

Foam over Platon dimple mat on foundation

We are stumped at a stage in our building process. Winter is here and we need to deal with our foundation. Our site is dry dry dry, but we are not ready to just attach foam to the cement and backfill without any effort to damp/water proof the foundation.

We are essentially forced to use a mechanical system as the weather and temperatures (-10 degrees celcius and wet) are making any other sort of damp/water proofing impossible (as far as we know).

In Green building techniques | Asked By jessie pratt | Dec 11 12
4 Answers

Best waterproofing to be used over ICF walls

Just put up the ICF walls and filled with concrete on our well insulated house in Zone 7. Was planning on using Grace Bituthene. It seemed to work well on another storage building constructed with the same ICF walls.

The area is properly drain tiled, and the house is in a fairly well drained area to boot.

Just wondering if there is maybe something better out there?

Thanks!

Steve

In Energy efficiency and durability | Asked By Steve Lenertz | Jun 29 17
7 Answers

Housewrap under outsulation foam

Can you tell me if the housewrap actually serves a purpose underneath foam board?

In Green building techniques | Asked By Joshua Terry | Aug 3 17
4 Answers

Turning a barn into a house: Roof quandary

Hi GBA community!
I am in the midst of converting a not too old timber framed barn into a house for a friend/client. It's going well, and we have a good plan for the thermal enclosure, in my opinion. There's a small matter of the roof, though.

In Energy efficiency and durability | Asked By David Bailey | Aug 16 17
4 Answers

Flat residential roof?

Residential architecture has been leaning towards flat roofs, from what I've seen they always leak!! What is the best way to insulate, and protect from ice & water breaching the asphalt torch down?
Zone 3
Thanks
Kris

In Energy efficiency and durability | Asked By Kris Currie | Aug 17 17
6 Answers

Advice on tight building

I have my house rough framed, we are framing out the roof now. Climate Zone 2 ( Just north of Austin). 2x6 conventional framing 16 on center, and has the typical double headers around windows etc. I am nearing having to lock down my decisions on sheething, insulation etc. I have been considering using Zip R for a couple reasons.

1. breaks my thermal mass, that I have plenty of
2. Weather and air seal.

It is anything but cheap, I am looking probably 7000 for the 1inch.

However I am looking at other options

In Energy efficiency and durability | Asked By Sleaton | Aug 15 17
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