Question
Determine the R value and U-factor for the following assemblies.Assume winter conditions. Use the attached Tables. Exterior Wall Component R-Value 3/8 Plywood 1 Air Space
Determine the R value and U-factor for the following assemblies.Assume winter conditions. Use the attached Tables.
Exterior Wall
Component | R-Value |
3/8\" Plywood |
|
1\" Air Space |
|
3 1/2\" Fiberglass Batt |
|
1/2\" Gypsum Board |
|
Inside Air Film |
|
Outside Air Film |
|
Rtotal |
|
U-factor |
|
Floor
Component | R-Value |
Carpet (Rubber Pad) |
|
3/4\" Plywood |
|
2\" Air Space |
|
2 1/4\" Insulation (R-7) |
|
Inside Air Film |
|
Basement Air Film |
|
Rtotal |
|
U-factor |
|
Ceiling
Component | R-Value |
1/2\" Gypsum Board |
|
3 1/2\" Fiberglass Blown Insulation |
|
Outside Air Film |
|
Inside Air FIlm |
|
Rtotal |
|
U-factor |
|
Roof
Component | R-Value |
Shingles, Asphalt |
|
Sheathing, 1/4\" Plywood |
|
Outside Air Film |
|
Inside Air FIlm |
|
Rtotal |
|
U-factor |
|
Step by Step Solution
There are 3 Steps involved in it
Step: 1
To determine the Rvalue and Ufactor for each assembly we need to calculate the total resistance Rval...Get Instant Access to Expert-Tailored Solutions
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Step: 2
Step: 3
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