Exterior of home is building envelope. Includes all components that separate indoors from outdoors. Prevent heat from being lost or gained inside home. Integral part of structures waterproofing system.

Foundation Thermal Envelope

Hold up structure. Keep out groundwater. Keep out soil gases. Keep water vapor out. Keep heat in during winter.

Non insulated concrete foundation is most basic. Heat loss from basement accounts for significant energy loss from a home. Apply rigid foam to exterior of foundation to provide thermal resistance and protect from environment (heaving of soil). Properly insulate interior of foundation.

Exterior wall assembly. Airtight construction. Moisture management. Insulation. Windows and doors.

Seal bottom plate of exterior walls. Caulk before installation. Caulk inside edge after installation.

Seal rim joist. Spray foam rim. Seal between top plate and rim joist. Seal between rim joist and subfloor.

Seal between door thresholds and subfloor. Seal window and exterior door rough openings. Use non-expanding latex based spray foam that will not pinch jambs or void warranties.

Protect exterior wall assemblies from water intrusion. All exterior finishes leak. Complete, properly lapped, and drained moisture barrier beneath exterior finish. Install adequate roof overhangs. Divert water from house. Water collection for irrigation.

Adequate amount of insulation. Proper installation.

Allow light into home. Present a major source of heat loss. Present a major source of heat gain. Low-E glass coatings. Low conductance gas fillings. Argon Krypton Low-E and gas fillings about 5% of windows overall cost.

Maintain intended function for intended life expectancy. Examples Roof overhangs Gutters Weather resistive barrier behind exterior finish. Enhanced foundation waterproofing. Proper flashing

Airtight construction. Keep moisture out. Saves energy. Prolong lifespan of structure. Improved air quality.

Green Building for Building Professionals National Association of Home Builders The NAHB University of Housing th Street, N.W. Washington, DC

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Reduce consumption of materials and waste. Increase durability and reduce maintenance. Reuse materials. Use recycled content building materials. Recycle waste during construction. Use renewable and resource efficient materials. Use materials which can be recycled at end of their life span.

19.2 and 24 on center spacing. Single top plate. Eliminate unnecessary framing at intersections. Size headers for actual load conditions. Eliminate bearing headers in non- bearing situations.

Floor and roof trusses. Engineered Wood Products (EWP) Uses resources efficiently. Greater spans. Durable. Environmentally friendly.

Plywood. Oriented strand board. Wood I-joists. Glue laminated lumber. Laminated veneer lumber. Parallel strand lumber. Finger-jointed studs. Timberstrand laminated strand lumber.

Have top and bottom chord Typically laminated plywood or Solid lumber. Utilize center web Consist of oriented strands or Laminated plys of lumber Save lumber utilizing more material.

Layers of dry wood veneers. Waterproof adhesive. Cured in a heated press. Grains run in same direction which makes a stronger framing member than conventional lumber.

Use several shorter 2x4 or 2x6 sections of lumber. Reduce warping. Adds strength. Interchangeable with non-jointed lumber.

Facility located in Deerwood, Minnesota. Oriented strand board product. Rim boards, columns, headers, and wall studs. Potential in window and door industry. Manufactured in 35x8x5 ½ billet. Uses resin, steam, and pressure. Centered within 13-county area with adequate supply of aspen which reaches maturity in about 30 years.

Insulated concrete forms (ICFs) Foam forms Air tightness, strength, sound, and insulation. Saves energy and money. Durability. Structurally insulated panels (SIPs) Floors, walls, and roofs Rigid foam sandwiched between layers of oriented strand board, plywood, or fiber cement. Framing, insulation, and exterior sheathing in one-piece component.

Fiber-cement Vinyl Masonry products Metal All offer durable options which have increased life spans and can typically be recycled.

Recycled content materials. Rapidly renewable materials. Reused or reclaimed materials. Composite materials.

Recycled content pop bottle carpet. Yarn from polyester resins from recycled pop bottles. Composite decking. Wood fibers. Plastic grocery bags and milk jugs. Cellulose insulation. Recycled news print Cardboard fibers Computer papers

Bamboo Durable flooring. Manufactured from bamboo which grows to heights of 40 and matures in less than 5 years. Neat grain patterns. Cork

Reclaimed flooring. Reuse doors. Interior trims.

Medium density fiberboard Cabinets Trims Doors Laminate flooring

Reduce disposal cost. Eliminate waste before it starts. Recycle Cardboard Grind wood and drywall waste for erosion control. Metal Increase material efficiency. Reuse Cabinets Doors Flooring Trims Enhance marketing image. Market your efforts.

Reduce materials with alternative methods. Recycle waste. Use resource efficient materials.

Green Building for Building Professionals National Association of Home Builders The NAHB University of Housing th Street, N.W. Washington, DC

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