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Green Needham / Next Step Living Weatherization Seminar for owners of Capes
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Weatherizing Cape Style Homes1. Identifying Weatherization
Opportunities and Challenges in a Cape.
2. Using Mass Save to make these homes more energy efficient!
Green Needham CollaborativeSince 2012, Green Needham and Next Step Living have: Signed up 1,089 residents for home
energy assessments Almost 600 scheduled assessments, and
500 were completed in 2012 These assessments resulted in 162
weatherization jobs, which saved homeowners on average $500/year
Cape Style HomeWeatherization Areas To Focus On Attic Cap Knee Wall Area Slopes of the
Upstairs rooms
WEATHERIZATION
A comfortable, safe, and energy-efficient home requiresContinuous thermal boundaries and air barriers that are in contact with one another. (US.DOE)
#1 Kneewall Typically Insulated
with fiberglass or nothing at all
Even though insulation is present, air movement around insulation and thermal breaks
Knee Wall Application Adding Foam
Board (Polyiso) on top of existing insulation
Sealed with spray foam
Insulates and Air Seal
#2 KWL Floor and Transition Typically the KWL
Floor is not insulated
KWL transition extends 2 feet into living space
KWL Floor Application Dense Pack the
Floor and Transition with Blown in Cellulose
Holes are drilled in floor, hose delivers insulation, holes are sealed up
KWL area treatment often improves more than one room: the adjacent bedroom and the living space below!
Attic Cap and Slopes(#3/4) Challenge: Attic Caps
with Low head room, cant insulate properly
Opportunity: Attic spaces with dimensioned "5 - 5 - 5". The slopes can be treated from the KWL area and insulation can be added to the cap without access.
5
55
Attic or Wall Hatches
Thermal Boundary
Air Barrier
An uninsulated attic hatch is a gap in the attic’s thermal boundary.
Insulating Wall Hatches and Attic Hatches
www.oldhouseweb.com
Ventilation Bath fans Improperly
vented will cause moisture problems in attic
Will also recommend adding an insulated ventilation pipe cover. Why?
1sf of ventilation for every 300sf of attic space (not a big problem in capes)
Propavents
Heat Loan Helps Support High Efficiency Heating Systems: Oil
Customers can save 40-50% in heating costs by switching
Single Pane to Double Pane Windows Conversion: Least Cost Effective energy efficiency option, but may be necessary with older homes
Heat Pumps
Why use a Total Climate Control:• CONTROL: Room-by-room heating and cooling in a single
unit
• AIR QUALITY: Filtered air circulation that improves indoor air quality
• SAVINGS: Up to 40% less expensive to heat your home than oil and more efficient cooling than central air or window units
• EASY INSTALL: No duct work or need to remove your current heating system
Ductless mini-split heating and cooling systems are covered by the 0% interest heat loan!
Questions and CommentsMichael Cucchiara
Community Programs ManagerNext Step Living917-612-9190