BASC Search

Retrofit of cantilevered wall showing details at the outside corner for installing air sealing and rigid foam insulation in the wall and closed-cell spray foam in the overhanging floor

Image

Retrofit of cantilevered wall with beam showing details at the outside corner for installing air sealing and rigid foam insulation plus water control membrane in the wall and overhanging floor

Image

A floor cavity between the first and second floor can provide a conditioned space for HVAC ducts if the rim joists are insulated and air sealed, if sufficient space is available, and if open-web floor joists are used

Image

Sealing Duct Boots to Floor or Drywall

Guide

Guide describing how to air seal around duct shafts and flues installed through ceilings, walls, and flooring in new and existing homes.

Wrong - Basement rim joist not sealed.

Image

The attic kneewall and the open floor cavities under kneewall are both sealed and insulated in one step with spray foam insulation

Image

Air barrier at garage band joist - 1 1/2 inch rigid insulation with 2x4 sleepers

CAD File

Air barrier at garage band joist - 1 inch rigid insulation with 1x3 wood furring

CAD File

Air barrier at garage band joist - 1 inch rigid insulation with 2x2 wood furring

CAD File

An IR camera image shows gaps around HVAC flue pipes allow conditioned air to leak through blown fiberglass into the attic

Image

Right - Foil-faced polyisocyanurate insulating rigid foam sheathing is installed below the floor framing of this house built on piers; however, the seams should be sealed with metal taped and the plumbing elevated and protected.

Image

This IR camera image shows air leakage indicated by the dark purple streaks along the bottom plates and below the window sill, as well as some heat loss at the electric outlet.

Image

The dark areas in this IR camera image show air leakage coming up from the bottom plate along the wall. It is especially cold in the corner where the two exterior walls meet.

Image

Floor Above Unconditioned Basement or Vented Crawlspace

Guide

Guide describing how to air-seal and insulate the floor above an unconditioned basement or crawl space.

Cantilevered Floor

Guide

Guide describing how to air-seal and insulate a cantilevered floor.

Floor Above Garage

Guide

Guide describing how to create an air barrier between the garage and the conditioned space above it to prohibit pollutants from entering a home's interior.

Cold Climate Building Techniques and Concepts: building a raised floor

Video

Video from Cold Climate Housing Research Center describing building a raised floor in cold climates for air-sealing and insulation purposes.

Water Management of Existing Crawlspace Floor

Guide

Guide providing information about treating bulk water drainage issues and moisture control measures in existing basements and crawl spaces.

Ducts in Interstitial Floor Framing

Guide

Guide for designing and installing interior ducts in an interstitial floor cavity in new and existing homes.

Insulating Existing Floors over Garage

Guide

Guide describing how to insulate and air seal the floor joists over a garage when there is loving space above the garage.

The application of intumescent coating/protection layer protects this elevated floor system from below.

Image

New Whole-House Solutions Case Study: Tindall Homes: The Legends at Mansfield, Columbus, NJ

Case Study

Case study describing a new construction building project of 20 luxury homes in northern New Jersey that were more energy efficient than ENERGY STAR and met the 50% energy savings requirements of the federal tax credit for new homes.

Right - Foil-faced polyisocyanurate insulating rigid foam sheathing is installed rather than fibrous insulation below the floor framing of this house built on piers

Image

Install rigid insulation and finish material below the framing and cavity insulation of a building overhang

The ceiling over an unconditioned space is insulated with closed-cell spray foam that fills the ceiling cavities and encapsulates the framing

Image

Retrofit of cantilevered foundation wall showing details at the inside corner for installing closed-cell spray foam in the wall and overhanging floor

Image

Rigid Foam Insulation Installed over Existing Foundation Slabs

Guide

Guide describing how to insulate an existing slab floor by adding rigid foam insulation over the slab then installing a floating subfloor.

Water-Resistant Flooring

Guide

Guide describing appropriate flooring for wet areas of the home.

Retrofit of cantilevered wall showing details at the outside corner for installing air sealing and rigid foam insulation in the wall and closed-cell spray foam in the overhanging floor

Retrofit of cantilevered wall with beam showing details at the outside corner for installing air sealing and rigid foam insulation plus water control membrane in the wall and overhanging floor

A floor cavity between the first and second floor can provide a conditioned space for HVAC ducts if the rim joists are insulated and air sealed, if sufficient space is available, and if open-web floor joists are used

Sealing Duct Boots to Floor or Drywall

Wrong - Basement rim joist not sealed.

The attic kneewall and the open floor cavities under kneewall are both sealed and insulated in one step with spray foam insulation

Air barrier at garage band joist - 1 1/2 inch rigid insulation with 2x4 sleepers

Air barrier at garage band joist - 1 inch rigid insulation with 1x3 wood furring

Air barrier at garage band joist - 1 inch rigid insulation with 2x2 wood furring

An IR camera image shows gaps around HVAC flue pipes allow conditioned air to leak through blown fiberglass into the attic

Right - Foil-faced polyisocyanurate insulating rigid foam sheathing is installed below the floor framing of this house built on piers; however, the seams should be sealed with metal taped and the plumbing elevated and protected.

This IR camera image shows air leakage indicated by the dark purple streaks along the bottom plates and below the window sill, as well as some heat loss at the electric outlet.

The dark areas in this IR camera image show air leakage coming up from the bottom plate along the wall. It is especially cold in the corner where the two exterior walls meet.

Floor Above Unconditioned Basement or Vented Crawlspace

Cantilevered Floor

Floor Above Garage

Cold Climate Building Techniques and Concepts: building a raised floor

Water Management of Existing Crawlspace Floor

Ducts in Interstitial Floor Framing

Insulating Existing Floors over Garage

The application of intumescent coating/protection layer protects this elevated floor system from below.

New Whole-House Solutions Case Study: Tindall Homes: The Legends at Mansfield, Columbus, NJ

Right - Foil-faced polyisocyanurate insulating rigid foam sheathing is installed rather than fibrous insulation below the floor framing of this house built on piers

Install rigid insulation and finish material below the framing and cavity insulation of a building overhang

Builders Challenge Technology Information Packages - Cold Climate: Chicago

New Whole-House Solutions Case Study: Nelson Construction: Hamilton Way, Farmington, CT

The ceiling over an unconditioned space is insulated with closed-cell spray foam that fills the ceiling cavities and encapsulates the framing

Retrofit of cantilevered foundation wall showing details at the inside corner for installing closed-cell spray foam in the wall and overhanging floor

Rigid Foam Insulation Installed over Existing Foundation Slabs

Water-Resistant Flooring