R-value for Log cabin

Wayco Wayne_2

someone tell me the R-valur for a log cabin wall. Thanks!

<A HREF="http://www.heatinghelp.com/getListed.cfm?id=255&Step=30">To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Contractor"</A>

Floyd_5

Your results may vary....

but I did this "Log Cabin" figuring R-20 with the Wirsbo ADS
Used joist trak, and was keeping it comfortable (68) with 110* water @ 0 outside, with no insulation under the joist trak yet. Of course the basement radiant isn't running much... the 1st floor joist trak is doing both! Once the HO gets things insulated my bet is that I can back things down to 95-100, that'll get those Munchie's really pissin'

Floyd

Toearly

> someone tell me the R-valur for a log cabin wall.

> Thanks!

>

> _A

> HREF="http://www.heatinghelp.com/getListed.cfm?id=

> 255&Step=30"_To Learn More About This

> Professional, Click Here to Visit Their Ad in

> "Find A Contractor"_/A_




We use to figure 1 R per inch of wall. Never had a problem and we did quite a few log homes.

If the logs are wet heating will be a problem until the moisture is under control.

Avoid set back thermostats

Hope it Helps
David

Greg Swob

R-Value

Had a neighbor who sold log homes at one time-
Pine R-value was ave. 18, whild the Oak log models had an R-16. Soft lumber species resist heat transfer better.
If this is a 'kit', check with the maunfacturer for details. Somewhere, they would have had to prove R-values for energy codes. The 'R' of a log home could vary much, depending on log diameter and species. Large logs at the base course, then smaller dia. logs at the gables & wall tops. Greg

Mark Wolff

More info

R value will depend upon the species of wood, moisture content, thickness of walls, proper chinking between joints,etc.

Some standard info would be that softwoods have a higher R value due to the air pockets in them. The air pockets act as insulators just like standard insulation. As the log home manufacturer for their listed specs on wall R-value for the kit being installed then decrease by at least 15%. They usually lie or at least fudge a little to make it sound better than the competition.

Jerry Boulanger_2

The ASHRAE Fundamentals

handbook (Chapter 25 in the 2001 edition) lists R values per inch thickness for 4 different hardwoods and 6 different softwoods, all based on 12% moisture content.