HomeMy WebLinkAboutB14-0302 Wall Insulation letter.pdfBERGLUND ARCHITECTS, LLC
June 21, 2015
Town of Vail Building Dept.
RE: Wall Insulation at Interior Step Light condition at Foundation Wall
2722 Cortina Lane
Vail, CO 81657
Building Permit #814-0302
To whom it may concern,
We have reviewed the exterior wall insulation condition at the two proposed interior electrical boxes
for the interior stair step lights for the above mentioned project. Per an email from Greg Johnson,
Vail Custom Builder's Superintendent for the project, dated 6-18-15, the concrete foundation wall
was notched at the two stairway step lights to provide approximately 1 'W' inches of expanded 2#
spray foam insulation behind the electrical boxes for the step lights going down to the lower level.
The two notches that are approximately 1 %"deep x 4"wide x 3"tall, are located at the top of the
stairs and at the stair landing. Once the electrical boxes are installed and remaining void behind the
electrical boxes will be completely filled with expanding 2# spray foam insulation providing
approximately R 10 (R6.6 x 1.5") behind the boxes in addition to the R 10 continuous insulation on
the exterior for the foundation wall, which provides a total assembly of R20 which exceeds the 12
IECC insulation requirement. The insulation assembly, as proposed to be installed, will meet the
requirements of the constructions documents and 2012 IECC insulation code requirement.
Sincerely,
Hans Berglund, AIA, LEED-AP HOME
Berglund Architects
P.O. Box 2378, Edwards, CO 81632
Tel: 970 926-4301 fax: 970 926-4364