We provide specialized building supplies, expert guidance, and advanced education to architects, contractors, building owners, and construction industry professionals. Our sophisticated knowledge base and innovative product line promote quality green building methods, energy efficiency, comfort and health. Dan Berteletti -- dan@emubuildingscience.com Jackie Burnett -- jackie@emubuildingscience.com March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
IECC 2015 BUILDING ENERGY CODE: “The intent is to advance the trades with the latest and best practice of building science and reduce the overall impact of the building sector on the environment.” March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
IECC 2015 BUILDING ENERGY CODE: FOCUS IS ON BUILDING ENVELOPE attic Conditioned Space crawl space March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
THE IMPORTANCE OF THE BUILDING ENVELOPE This is a fish… in a state of comfort… at home in his fish bowl. 4 March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
THE IMPORTANCE OF THE BUILDING ENVELOPE Let’s draw an analogy… Your House You 5 March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
THE IMPORTANCE OF THE BUILDING ENVELOPE To keep our fish friend comfortable, we add water as needed. In a similar fashion, you add energy to your house to keep comfortable. Some of the water (or energy) is clean… Some is less clean… March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
THE IMPORTANCE OF THE BUILDING ENVELOPE Things become more serious, however, when there is a crack in the fish bowl. To keep our fish friend comfortable, we need to add more and more water. March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
THE IMPORTANCE OF THE BUILDING ENVELOPE Until eventually we are spending a lot of money simply trying to maintain a decent level of comfort. All because the fish bowl has a crack. March 2016 - presentation by Emu Building Science - Boulder, CO March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com www.emubuildingscience.com
THE IMPORTANCE OF THE BUILDING ENVELOPE What’s the solution? Sometimes the most economic solution is fixing the crack. ottobre 2014 March 2016 - presentation by Emu Building Science - Boulder, CO March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com www.emubuildingscience.com
THE IMPORTANCE OF THE BUILDING ENVELOPE What’s the solution? Sometimes the most economic solution is fixing the crack. Other times, it makes sense to buy a newer, thicker, and more resistant bowl. ottobre 2014 March 2016 - presentation by Emu Building Science - Boulder, CO March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com www.emubuildingscience.com
THE IMPORTANCE OF THE BUILDING ENVELOPE Either way, to avoid having to add lots of water in the future, it’s smarter to invest in the fish bowl… not the water tap. ottobre 2014 March 2016 - presentation by Emu Building Science - Boulder, CO March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com www.emubuildingscience.com
HOW CAN OUR FISH FRIEND HELP US TO RETHINK THE IMPORTANCE OF OUR BUILDING ENVELOPE? March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
WHAT MAKES UP YOUR BUILDING ENVELOPE? Structure: Walls Windows/Doors Roof/Ceilings attic Floors Foundation Conditioned Space Variables: Thermal insulation crawl space Moisture diffusion Air infiltration Solar heat gain March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
WHAT ARE THE BENEFITS OF YOUR BUILDING ENVELOPE? Durability – Safety – Health – Comfort attic Protection against – Weather Conditioned Space – Fire – Insects, Rodents, Bigger Animals crawl space – IAQ, Odors, Noise March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
WHAT ARE THE BENEFITS OF YOUR BUILDING ENVELOPE? Durability – Safety – Health – Comfort attic As we build tighter, control of air infiltration and moisture Conditioned Space management becomes critical. crawl space March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
HOW DO WE ACHIEVE A ROBUST BUILDING ENVELOPE? Let the building code guide us: A continuous air barrier shall be installed in the building envelope. The exterior thermal envelope contains a continuous air barrier . Breaks or joints in the air barrier shall be sealed. March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
Air Barrier - Definition Any durable, solid material that blocks air flow between conditioned space and unconditioned space, including necessary sealing to block excessive air flow at edges and seams . March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
Air Barrier - Definition Any durable, solid material that blocks air flow between conditioned space and unconditioned space, including necessary sealing to block excessive air flow at edges and seams . Ensures low air infiltration rates Controls air leakage through the building envelope Controls ventilation for fresh air ->ACH Controls conductive heat transfer through exterior walls March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
Air Barrier Types Building Sheet Wraps Dupont Tyvek SIGA: Majvest & Majcoat ProClima: Intello & Solitex Grace Vycor & Ice and Water Shield Rubber membranes Polyethylene film Typar Tar/Building Paper Plywood, OSB, ZIPs w/Taped Seams Self-Adhered Sheet Membranes Liquid Applied Membranes Spray Foam March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
Air Barrier - Sealing Ceiling Chimney Lights Penetrations Attic Hatch Exterior Window Door Wiring Floor Foundation Plumbing March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
HOW DO WE ACHIEVE A ROBUST BUILDING ENVELOPE? Let the building code guide us: Exterior thermal envelope insulation for framed walls shall be installed in substantial contact and continuous alignment with the air barrier March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
HOW DO WE ACHIEVE A ROBUST BUILDING ENVELOPE? Let the building code guide us: March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
Insulation Types – Interior and Exterior Foam Plastic Insulation: Fibrous Insulation Polyisocyanate Fiberglass Batt Spray Polyurethane foam Mineral Wool Expanded polystyrene (EPS) Slag Wool Extruded Polystyrene (XPS) Cellulose (dense-packed) March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
Building Energy Code - Envelope Points of Focus : Goals : Air Sealing: Management of Vapor Open / Vapor Closed Wall liquid water (rain and ground assembly. water), airflow, water vapor flow, and heat flow. Remove dew point from within wall Insulation: Prevent your sheathing from getting cold cavity. enough for “condensation” (moisture accumulation) to be a problem. Air Sealed sufficiently to meet Blower Quality Control during installation Door Test. Durability: Winds load, Seismic Predictable, long lasting results. Risk Movement, Thermal Expansion management plan. Frost/Thaw March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
Insulation – Interior and Exterior Overall R-Value: Reduce heat losses in Walls, Roofs, and Floors R-Value is not enough: Exterior Insulation Eliminate thermal bridging Keep wall sheathing warm • The thermal performance of a wall is greatly improved when wall sheathing is protected by an exterior layer of insulation. • Reduce condensation risk Exterior wall insulation keeps wood warm, keeps wood dry, reduces the condensation potential, reduces thermal bridging, and probably increases the durability of the wall. Ratio of Exterior to Interior Insulation is Critical March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
HOW DOES BUILDING CODE INTEGRATE INTO BUILDING ENVELOPE DESIGN? Vapor Closed Vapor Open March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
Wall Assembly - Components INSIDE Drywall Vapor Control Layer INSIDE Cavity Insulation Framing/Structure Exterior Sheathing Exterior Insulation Air Barrier Control Water Control OUTSIDE Siding OUTSIDE March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
Wall Assembly - Vapor Open INSIDE OUTSIDE March 2016 - presentation by Emu Building Science - Boulder, CO www.emubuildingscience.com
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