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9 Answers

Roxul and cladding help

I need some help. I'm trying to build a house with 2x6 construction, zip sheathing with fast flash, 2" of roxul comfortboard, 2x4 furring strips and lp smartside. I planned on using heco fasteners. First of all, is this an efficient wall assembly? I'm here in MO and there are no builders familiar with exterior insulation. I'm getting frustrated as everyone is trying to talk me out of using it. Tilt up construction is common here so has anybody successfully done this in a tilt up fashion or should I have the framers do the sheathing and try to find another trade for roxul and cladding?

In Green building techniques | Asked By User-7088022 | Jul 11 18
39 Answers

AECB Website and Point Thermal Bridges

Some interesting thoughts about thermal bridges in this document.....

"Point thermal bridges -.....the nails, screws and other fixings in timber-frame construction."

My Question is Concerning Outsulation Strategies.....
What is the thermal effect of the 100's of large "nails,screws and other fixings" that penetrate the outsulation and terminate in the studs and plates( which are also thermal bridges)?
In other words...a thermal bridge connected to a thermal bridge.
Is it significant?

In Green building techniques | Asked By John Brooks | Oct 12 09
10 Answers

Insulate addition walls, attic space, and partial cathedral ceiling


In Energy efficiency and durability | Asked By User-6903602 | Jul 16 18
2 Answers

Painting exterior of brick home

I live in a brick ranch build in 1976, its wood framed with brick cladding. The brick is down right ugly, its a mix of a few different colors of gray/tan and has some serious clay staining around the bottom. I really want to paint the exterior of the brick but I'm not sure how smart of an idea that is. I know the brick need to allow moisture to pass through so that has me looking at products such as Behr Elastomeric Masonry paint which claims to be breathable.

In General questions | Asked By Steelear | Jul 17 18
9 Answers

Bath exhaust fan pulling air from basement?

Hey guys,

We have been in our "Pretty Good House" for about 9 months now and still dialing in all the systems. Our blower door test was a .08 ach50, and we still have some holes to fill in the basement where the hvac line sets were cut through the walls. We have panasonic whispergreen bath fans that I have been fiddling with to get the right amount of continuous fresh air.

In Green building techniques | Asked By Clay Whitenack | Jul 6 18
21 Answers

Comfortboard pricing - Triple $ per R vs foamboard??

Hi all,

In Green products and materials | Asked By Keith H | Apr 21 16
20 Answers

Insulating an attic furnace room

I have a furnace in my attic around which the builder constructed an enclosure from 2X4 and foil-backed fiberglass insulation. I've been told the R-value of the insulation should be sufficient, but there is clearly air getting through at the seams and creating hot spots in the attic which then leads to ice dams etc. What is proper protocol for insulating these attic "furnace rooms"?

In General questions | Asked By Patrick Finn | Oct 15 14
16 Answers

Seal and insulate 1960s attic?

First off I apologize if this is the wrong category.

I currently have an L shaped ranch style home that was built in 1961 with a 3:12 slope hip roof with 3" overhangs. I currently have three gable vents, and no soffit venting. There is little to no insulation in the walls except on the south and west facing walls where I have opened them up over the years when doing renovations and installed R-13 fiberglass batt insulation. I would probably grade myself a II on install quality. In the attic there is blown in rockwool insulation about 6-8 inches deep.

In General questions | Asked By Striker169 | Feb 22 18
7 Answers

How to treat wet sandy cottage crawlspace in zone 5A/6A?

Situation: cottage on the sandy shores of a large lake in Michigan on the border of climate zones 5A and 6A. The cottage is set back from the lake front perhaps 200 feet, but is probably less than 2’ above lake level. The footings are likely below lake level. To make things worse, there is a natural drainage swale running behind the cottage that some good neighbors have effectively dammed, so there is permanent standing water about 100’ behind the cottage.

So of course the cottage is built with a crawlspace, with a sand floor and concrete block walls.

In Energy efficiency and durability | Asked By andrew c | Jul 14 18
12 Answers

Open truss post frame roof

I am building a cabin on Ky lake and want to do it post framed. The floor plan calls for vaulted ceiling over the kitchen and living area. I want to do exposed scissor trusses on 8’ centers. My thoughts were to span the trusses with vertical 2x6s on 24” centers and fill with batts then cover the bottom side between the trusses with tongue and groove pine. So what would I cover the top side 2x6s? I was thinking osb then 2” rigid foam then layer of 1/2 plywood screwed to the 2x6s then foil bubble wrap then metal.

In Green building techniques | Asked By kcov | Jul 8 18
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