Helpful? 0

Insulation refit and balancing the insulation.

House located in zone 2A, off the ground ~ 2 feet (1800 sq ft). The house has a sloped metal roof with 2 x 6 rafters on 24 inch centers and 2 x 4 stud walls on 16 inch centers. Currently there is no insulation in the walls or floor and 5 1/2 inches of fiberglass on the attic floor.

Plans:
Attic Unvented (~R30) 5 1/2 inch fiberglass batt with 2 inches of rigid poly iso foam.
Walls (~R20) 3 1/2 inch fiberglass batt with 1 1/2 inches of rigid poly iso foam.
Floor (~(R13) 2 inches of closed cell foam.
Windows triple pane low e argon gas filled.

Is this a balanced insulation plan? I am looking for the most bang for my buck and was wondering if these insulation levels made sense together?

Asked by David McMillan
Posted Sat, 07/28/2012 - 06:31

Tags:

1 Answer

Select your preferred way to display the comments and click "Save settings" to activate your changes.
1.
Helpful? 0

David,
Most builders would probably argue that it's hard to justify the use of triple glazing in Climate Zone 2. Even Passivhaus builders have managed to meet the Passivhaus standard in Climate Zones 2 and 3 with just double glazing.

Answered by Martin Holladay, GBA Advisor
Posted Sat, 07/28/2012 - 10:03

Other Questions in Plans Review

Retrofit heating system

In Mechanicals | Asked by Carole Florman | Sep 15, 14

Insulating and air-sealing a room-in-truss over a garage

In Energy efficiency and durability | Asked by Ben Helmreich | Sep 15, 14

Options for air sealing T&G ceiling with no air barrier installed

In General questions | Asked by Rob Leonard | Sep 14, 14

The differences between mass and insulation

In Green products and materials | Asked by Nathaniel G | Sep 15, 14

Spray foam & wood roof deck

In Energy efficiency and durability | Asked by Sheila Sullivan | Sep 12, 14
Register for a free account and join the conversation


Get a free account and join the conversation!
Become a GBA PRO!