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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Continuous insulation definition

John Covello

Senior Sustainability Manager

UL Solutions

LEEDuser Premium Member

7 thumbs up

February 18, 2014

Hello, We have a project where our resort rooms will be using spray foam insulation above a concrete slab, set in zone 1. Our rooms are actually small villas. The villas have bay windows with a separate small roof structure, part of which is in air conditioned interior space. ASHRAE 90.1 Table 5.5-1 calls for R-3.5 (S.I.) "continuous insulation". Does this still fit the definition of continuous insulation even though most is above and some is below in the bay window area? Is this a concern if one is using Option 1 energy modeling for meeting this LEED prerequisite?

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 02/18/2014 - 14:09

I can't tell if your situation is continuous or not based on your description. Continuous means without any break or gap. The baseline is always modeled as continuous, consistent insulation. The proposed gets modeled as designed. See Table G3.1-5 Proposed for the allowable exceptions. The insulation provisions are not mandatory so you are not required to provide continuous insulation for LEED as this strategy is available for trade-off.

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