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Old 07-03-2008, 02:19 PM   #16
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Brick veneer or Structural Brick?


Use the R-value table below to help you determine the R-value of your wall or ceiling assemblies. To obtain a wall or ceiling assembly R-value you must add the r-values of the individual components together.

http://www.coloradoenergy.org/procor...f/r-values.htm

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Old 07-03-2008, 03:03 PM   #17
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Brick veneer or Structural Brick?


Not as quite simple as adding Rs, even if you use the R-value concept.

If you use fiberglass in a framed wall, you can NEVER reach the advertised R-value of the "insulation" material. Depending on the stud material (wood or metal) and stud spacing (24", 16" or 12"). As an example, for 6" R16 insulated frame wall would be no better than R1 to R16 or R17. If the insulations has about 1/2 to 1% moisture, you could knock of another 1/3 or 1/2. Fiberglass is tested bone dry in a lab without framing for a short period of time. There is no consideration given to air infiltration. This is the reason why rigid performs so much better in the real world, since it does not suffer from the "stud thermal short circuiting", mosture and air infiltration problems not mentioned by the glass people.

If you have a heavier, more stustantional wall (usually with some masonry) there are mass correction factors for a credit based on the climate. These are a minimal attempt (affected by politcis) to give a partial creitd to maintain the image of credibility.

Unfortunately, U.S. codes are minimal standards and are written to be easily enforced and use advertised R-values for a "no-brainer", quick and easy design and construction. Maybe that is why most of the other countries in the devopled world use concrete and masonry for residential construction and not wood & fiberglass.

I had a group of 15 Russian builders, engineers and designers that a I show U.S. construction to for about a week. Since I was a friend, they did not have to be polite and could laugh when they were out of range of the U.S. designers and builders. The best comment came after seeing a $750,000 log model home and another under construction. When we left, I was asked - "Deek, Why to they build homes out of firewood?"

One Russian builder took out a pad and detailed the corner and intersecting wall details, and showed/explained the heat flow and indoor surface temperatures for both summer and winter in about 10 minutes. I defy a U.S. builder to be able to do that.

I always got the same general impression about insulating building materials used from the guests I had from China, India, Germany, Spain, Poland, Hungary, Turkey and others. They all understand that a house goes through cyles between day and night, season to season and annually and not just a short snapshot in a lab taken by a pink animal for advertising and code purposes.

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Old 07-03-2008, 03:44 PM   #18
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Brick veneer or Structural Brick?


So reading more, the block is 50% empty, it can be filled with expanded foam, which has R-value of 6 per in, so R24 for 4" (half of 8" block), just average it then about R12. But just like wood frame studs, the areas of brick that have no foam conduct the temp through, so maybe we have half R12 call it R6.
That's not terrible. I think this house currently has no insulation at all inside the walls. And I note I will have about 100sq ft of window and vaulted ceiling, so kinda whats the point in a way. From the thermal mass perspective, it makes it worse during the height of summer when it doesn't cool off at night.
This house has a big pool and big covered patio in back with shade trees, so during the height of summer, we'll be in the back by the pool, not in the front room.
I'd further add that the noise block from the brick mass can reduce traffic noise, which comes from that direction, although not too much as the busy street is a house away.

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Old 07-03-2008, 05:39 PM   #19
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Brick veneer or Structural Brick?


Nimble,
You seem convinced that this is the right idea so go ahead and do it since you'll always doubt yourself if you don't. IMO, I don't see anyway that a brick wall is going to give you the insulation value of a properly insulated stick wall (I remember seeing something like 8' of brick is equal to 3" of fiberglas in preventing thermal conduction). The thermal conductivity of a brick is much higher than fiberglas, foam, cellulose, etc and in no way can be as efficient as stopping heat flow into/out of your living space.
Good luck with your project.
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Old 02-22-2013, 09:11 PM   #20
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Brick veneer or Structural Brick?


Hi All I built A 3000ft scr home in vancouver washington . And I love it . It was very expensive to Build but worth it . I used 12x8 Inca red scr brick . my tallest wall is 10ft . That is in the 24 x 44 garage . All my floors are concrete with rebar and tied to two sub footings . One for the walls and one below that supports the roof assy . I also made all my inner walls full structral . They are KD 2x4 sitting 1 inch off the brick Then after wiring and plumbing they were filled and screeded with ISO foam. my heating and ac bill is about 1/2 to 1/3 of other houses this size. I also used A Venmar 3000 hepa fresh air exchanger Because the house is so tight . The county held me up for two years scratching there head or something . It can be done and very nicely but not cheep . Thanks Bill Green

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