The Environmental Impact of Different Insulation Materials

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Presentation transcript:

The Environmental Impact of Different Insulation Materials By: Sarah Gingrich

General Environmental Concerns Effectiveness Suitability Structural Compatibility Maintenance Requirements Production Aspects Retrieval / Transportation Impacts Preparation / Processing Recycled Content By Products Energy & Material Consumption Disposal / Degradation / Recyclability Environmental Integrity of Producer

Types of Insulation Materials Fiberglass Cellulose Agricultural Mineral Plastic

Fiberglass Different types Advantages Disadvantages Recent Innovations Batts Blow–in Advantages ~25% Recycled Content Disadvantages Chemical Binder Used Fiber similar to Asbestos – Air quality issues High Embodied Energy Recent Innovations Higher density – better R-values Healthier – no chemical binder, less irritation

Cellulose Usually Blow-in Insulation Advantages Disadvantages ~75% Recycled Materials R3.6-3.8 per inch Low embodied energy Disadvantages Possible Off-gassing Fire Retardants Added

Agricultural Cotton Fibers Batts or Loose-Fill Advantages Made from Mill waste or recycled cotton Does not irritate skin Disadvantages Treated with a fire retardant

Agricultural Straw Bale Advantages Disadvantages Low cost Disadvantages Only R2.4-3.0 per inch Compressed Straw is new to the market

Mineral Perlite Used as insulation in concrete block cavities Advantages Made from volcanic material Aggregate Non-flammable and lightweight ~ 23% recycled content Disadvantages High embodied energy

Mineral Rock Wool Usually Blow-In insulation Advantages Disadvantages ~75% recycled steel slag Non-flammable, chemically inert Disadvantages High embodied energy Air quality problems similar to Fiberglass

Mineral Cementitious Foam Usually blow-in insulation Advantages No indoor air quality issues Naturally fire proof, lightweight Made from magnesium from sea water Disadvantages Not usually a recycled content Friable (easily crumbled)

Plastics Kinds of Plastics Types of Insulation Polyurethane Polystyrene Polyisocyanurate Icynene Types of Insulation Blow-In Rigid Board Fiber Batts

Plastics Blow-in and Rigid Board Advantages Disadvantages Very high R values ~5-9% recycled content Disadvantages Possible Off-gassing especially CFC and HCFCs

Plastics Recent Innovation – Fiber Batts Advantages Disadvantages 100% recycled PET plastic R3.8-4.3 values per inch Does not burn Disadvantages Melts at relatively low temperatures Difficult to cut

Different Ways to Insulate Batts Blow-In Rigid Board Structural Insulated Panels Insulated Cement Blocks

Batts and Rigid Board Advantages Disadvantages Easy Installation Leaves cracks and crevices  Air leaks High embodied energy to form

Blow-In Insulation Advantages Disadvantages Fills in cracks and crevices Can be trimmed to fit Disadvantages Requires expert installation Expensive equipment Can off gas

Structural Insulated Panels Advantages Fit together perfectly, easy installation No holes Cracks are sealed No need for framing Disadvantages Usually made with Chemical Insulation

Insulated Cement Blocks Advantages Create your own mix of cement Very high structural stability Disadvantages Uses plastic or Styrofoam Off-gassing, harmful to atmosphere

Importance of Proper Installation Energy Reduction Super Insulation Air Leaks Air Quality