By doubling the thickness of the wall to 16 inches the r value only increases by 0 50.
R value of tilt up concrete wall.
The 3 most common insulation methods for tilt up concrete construction.
We manufacture and distribute a full line of concrete insulation systems for use in plant precast site cast tilt up and cast in place projects.
However since it s easy to add insulation to any tilt up panel this number can rise substantially.
Download the document in pdf format 2 pages 214 kb astm c1289 type ii class 2 polyisocyanurate data sheet.
As building codes require greater energy efficiency the thickness of insulation increases.
This contributes to its strength high r value and moisture resistance.
You will notice in the findings shown in the isothermal analysis that the thermomass wall panel has a material r value of r 11 49.
The insulating materials used for these systems range in r value.
The steady state thermal analysis shows the total isothermal r value for the wall with the ability to factor in thermal breaks such as metal ties or solid concrete sections.
Walls can range from r values of about 2 for uninsulated panels up to about 32 for walls containing thicker layers of insulation.
Jim baty with the tilt up concrete association tca provides an in depth review of tilt up wall panels compared to other building systems for new r value and u value requirements in a recent article in.
The r value of an uninsulated 8 inch thick basement wall built using normal weight concrete is 1 35 based on data from the 1993 american society of heating refrigeration and air conditioning engineers handbook.
Based on astm c518 calculation method the door has an r value of up to 11 but using astm c1363 tested operable the same door only have an r value of up to 3 5.
The standard r value of ready mix concrete used in the tilt up industry including the air film is 1 49 for an 8 inch wall panel.
This is a huge difference and essentially comes down to astm c518 being a theoretical maximum based on a steady state thermal test of only a portion of the door panel.
Thermomass isomass insulation combines a high performance polyisocyanurate foam core with a multiplex kraft aluminum poly facer.
By placing 2 inches of extruded polystyrene within a tilt up panel as a sandwich panel the material r value of that wall is increased to 11 49 with air film coefficients of 0 85.
With over 35 years of experience we are the undisputed leader in concrete sandwich wall technology and can help you create building envelopes that maximize energy efficiency durability and performance.
