Sunlight solar green needham presentation sep 2010
Green needham nsl weatherization capes
1. Weatherizing
Cape Style
Homes
1. Identifying Weatherization
Opportunities and
Challenges in a Cape.
2. Using Mass Save to make
these homes more energy
efficient!
2. Green Needham
Collaborative
Since 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
4. Cape Style Home
Weatherization Areas
To Focus On
Attic Cap
Knee Wall Area
Slopes of the
Upstairs rooms
5. WEATHERIZATION
A comfortable, safe, and energy-efficient home requires
Continuous thermal boundaries and air barriers that are in contact
with one another. (US.DOE)
7. #1 Kneewall
Typically Insulated
with fiberglass or
nothing at all
Even though
insulation is
present, air
movement around
insulation and
thermal breaks
8. Knee Wall Application
Adding Foam
Board (Polyiso) on
top of existing
insulation
Sealed with spray
foam
Insulates and Air
Seal
9. #2 KWL Floor and Transition
Typically the KWL
Floor is not
insulated
KWL transition
extends 2 feet into
living space
10. 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!
11. Attic Cap and Slopes(#3/4)
Challenge: Attic Caps
with Low head room,
cant insulate properly
Opportunity: Attic
5
spaces with 5
dimensioned "5 - 5 - 5".
The slopes can be 5
treated from the KWL
area and insulation
can be added to the
cap without access.
12. Attic or Wall Hatches
An uninsulated attic
hatch is a gap in the
attic’s thermal boundary.
Air Barrier
Thermal Boundary
16. 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
17. Heat Loan Helps Support
HighEfficiency Heating Systems: Oil
Customers can save 40-50% in heating
costs by switching
SinglePane to Double Pane Windows
Conversion: Least Cost Effective energy
efficiency option, but may be necessary
with older homes
18. Heat Pumps
Ductless mini-split heating and cooling
systems are covered by the 0% interest
heat loan!
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