1 Foundation Moisture Control and Energy Performance

Crawl Space Wall Insulation

Interior Foundation Wall Insulation

Steel Wall Framing Equivalent R-values

The Builders’ Compliance Options Mass Wall Allowances – Log walls – Concrete – Other > 6 Btu/ft2-°F 5

Builders’ Compliance: Mass Walls 6

Wall Framing & Insulation 7

Ladder Framing

Header Insulation

Framing Details 10

Attic Kneewalls Step 1: Apply interior pressure boundary Check rating on foam products ASTM E-84, FM 4880, or UL 1040 Step 2: Continuous Insulation 11

Fireplace Infiltration Control Air leakage is significant around fire places – Air sealing a multi- stepped approach 12

Fireplace Infiltration Control Step one – install infiltration control after fireplace is framed Step two – seal infiltration control to framing Step three – install infiltration control to top of insert box Step four - insulate 13

Poor Insulation Installation 14

Wall Insulation Options

Blown Wall Insulation  Continuous coverage  Higher density insulation, such as cellulose and rock wool, reduce air leaks  Requires a skilled contractor  Damp insulation must dry before sheetrock installation 16

Foam Sheathing/ Window Flashing Caulked seams in foam sheathing

The Builders’ Compliance Options Moisture Protection in Wall Systems IRC Section R703.1: – “weather-resistant exterior wall envelope” – “prevent accumulation of water within the wall assembly” – “provide weather resistant barrier behind the exterior veneer” Cheap Insurance 18

Poor Insulation at Eave Cold corners contribute to condensation and mold growth. Possibility of ice dam formations. No room

Raised Heel Truss Insulate full height over exterior wall

Other Insulation Options Insulated Concrete Forms Autoclave Aerated Concrete Structural Insulated Panels

Airtight Insulation Contact Fixture (IC/AT) 22

Attic Insulation and Details

Attic Insulation Rulers 24

The Insulated Hatch

Foam (Icynene) Under-Roof 26

The attic shown has 2,000 square feet with R-30 insulation, but 3% gaps in the insulation and 50% low spots (R-19).What is average R-value? Average R-value of Attic 27

Average R-value Homework A 2,000-square foot floor with R-19 insulation, but 5% gaps in the insulation has what average R-value? An attic has 3,000 square feet with R-30 insulation, but 5% gaps in the insulation and 30% low spots (R-19). What is the average R-value? 28