and not found the place too drafty. The ASHRAE Steady State U-Value is 0.263. Its rho-value is higher than wood or paper which are so low that they are very slow to transfer their stored heat even though they also have nearly the same specific heat. I am concerned with extreme heat and extreme moisture. Too many windows on the north? <. Display and/or use of the information contained within this site constitutes acceptance of the Terms of Service and Privacy Policy. Meanwhile, Canadian immigrants in the Finger Lakes region and clustered around Geneva were sitting tight in their 1850's adobe homes. There are also ways in which the building can be designed to enhance the climate's ability to create thermal discomfort. Q: I have a recently constructed adobe with 2" of sprayed foam insulation on the outside of the outer walls.

Q: My wife and I recently bought a rambling adobe house outside Ranchos de Taos.

I would stick with concrete or pumice or cinder blocks for below grade construction basement walls. Q: I would like to make use of the thermal mass properties of Adobe. For a Medium Colored Wall the U-Values are North: 0.227; East: 0.198; South: 0.160: West: 0.204 For dark colored walls the values go down 10 to 30%. Insulation level are specified by R-Value. It might be worth considering long screws that will go from the stucco netting al the way through and two or more inches into the adobe. An electric blanket would help until help arrives. There is a significant time response factor that has to be calculated and you'd need higher end software to calculate the actual thermal performance of the thermal mass walls. Therefore for a given thickness of wall, the heat is returned to the living space over a longer period of time ", The examples and perspective in this article, Thermal conductivity versus apparent thermal conductivity, Surface temperature in relationship to mode of heat transfer, The limitations of R-values in evaluating radiant barriers, Non-reflective surface R-values for air films, "Building Code of Australia (BCA)". yard and ruined the grass. A: I would love to find a place with extreme moisture here in the Southwest. This official document was the first to publish dynamic state derived Effective U-Values (The reciprocal of R) for several cases of earthen walls that could be used in calculations required to demonstrate thermal performance that would meet the requirements of the Energy Conservation Code.

It is sometimes called cribbing as in corn crib. ( R = 1/U ) Because adobe is a storage device rather than a resistance device it generally performs well beyond predictions based on steady state numbers. The key, then, is to make sure the house is designed by someone who understands how to make it work with the climate. An adobe house performs differently than a lightweight structure. There are some installations of radiant floor heating which had no insulation under the floor. This approach is based on three or more temperature measurements inside and outside of a building element. The walls can range from 2.5R to 22R. It is not uncommon to find a temperature difference of fifteen degrees between the floor and ceiling due to heat stratification. The house is not that old, but when it seems as though relatively little attention to insulation was paid when it was built. There are several potential methods to this, each with their specific trade-offs: thermography, multiple temperature measurements, and the heat flux method.[42]. Neither I nor any of the advisor/consultants associated with this site will have liability for loss, damage, or injury, resulting from the use of any information found on this, or any other page at this site. Calculating the performance of radiant barriers is more complex. Nail-on Unless you can create a very powerful way to connect the two walls across the bridge of the insulation, the system will perform as two independent 9-inch walls. A: I'm gonna have to shoot that Carlos Biceps! m/W. It is a closed cell foam and will not loose its R-value to moisture uptake if it is below grade. The average between 85 and 55 is 70 and adobe normally delivers that average temperature. My propane bill is running $100 per week with me keeping the temp at 72 during the day and 66 during bed time. My question is what materials we should use for insulation, and is it recommended to have airspace insulation? (Letting cold air in.) Early day blown cellulose did tend to compact over time. Several lightweight loose insulation materials can be poured in later and will give similar R's. Many energy modeling programs and code calculations require U-factors (sometimes called U-values) of assemblies. The R-values for specific assemblies like doors and glazing in the table below are generalizations because they can vary significantly based on special materials that the manufacturer uses. R: I have checked for air leaks etc. more, Quentin moved into professional solar adobe construction in 1976 Brick has a very poor insulating ability at a mere R-0.2 per inch; however it does have a relatively good thermal mass. In your case a wall on the north side or below grade would act like the 2.5R. The spray is preferred if the cost is not prohibitive since it is polyurethane which is the basic ingredient in Gorilla glue and other glues.

In fact the R-value of compacted earth is roughly R-1 per foot, so a standard earthbag wall might yield no better than R-2. There are many ways in which the adobe building can be built to enhance its abilities to fend off the unwanted extremes of the climate. Would it be better to go with spray foam insulation rather than rigid foam board?

In your case a wall on the north side or below grade would act like the 2.5R.

The values in the table above were taken from a number of sources including: the ASHRAE Handbook of Fundamentals,, and Building Construction Illustrated by Francis D.K. We are investigating materials to use for interior thermal wall mass, and adobe seems like an excellent choice. including the frame and hardware.

What do you think? In standard lightweight construction with conventional heating we would have expected to have found the floor to be around 68 degrees, the walls around 72 degrees and the ceiling around 80 degrees. To obtain reliable data, R-values are therefore often determined via U-value measurements at the specific location (in situ). He became a licensed general contractor Thermal conductivity assumes that the heat transfer of the material is linearly related to its thickness. Rigid, poured in, blown in.