Your Name: Rachel Conly
Email Address: rachel@rachelconlydesign.com
Phone: 2077665625
May we contact you about your entry in the future? Yes
If yes, which contact method do you prefer? email
Your building company: Thompson Johnson Woodworks
Your builder's name: Heather Thompson
Your architecture firm: Rachel Conly Design LLC
Your architect's name: Rachel Conly
Passive building consultant: Rachel Conly
Street address of the retrofit:
Town or city: Peaks Island
State or province: Maine
Original construction year: 1900
Year when passive building work was or will be completed: 2016
Lot type: suburban
Type of structure: wood-frame
Building use type: residential
Brief description of the retrofit project: Deep energy retrofit, dormer additions, complete new interior and exterior
Why did you choose to do a whole, partial, or phased retrofit? needed total update/client request
Total area of the structure (in square feet): 1900
Total renovated area of the retrofit project (in square feet) : 1900
Date when the project began or is expected to begin (enter "01" for the day if you only know the month and year): a:1:{s:4:"date";s:4:"2014";}
How many months did the renovation take? If ongoing, how many months is the renovation expected to take? : 24
What were the main goals of the retrofit? Were these goals driven by you, a client or both? : total rebuild- both
Were people living in the building during renovation? no
Was this a registered historic building? no
Did you use historic tax credits? no
Passive house certified? no
If certified by another group, please list the organization:
Air tightness (ACH) before renovation: 17ACH50
Air tightness (ACH) after renovation: .04ACH50
Total annual electricity costs before renovation (in dollars): 1874.71
Total annual electricity costs after renovation (in dollars):
Total annual electricity usage before renovation (in kWh): 10,486
Total annual electricity usage after renovation (in kWh):
Total annual heat costs before renovation (in dollars): 1972
Total annual heat costs after renovation (in dollars):
Total annual heat usage before renovation (in kBtu) :
Total annual heat usage after renovation (in kBtu) :
Heat source(s) before renovation: existing-boiler
Heat source(s) after renovation: heat-pump
Annual hot water cost before renovation (in dollars): n/a
Annual hot water cost after renovation (in dollars):
Hot water system before renovation: a:1:{i:0;s:8:"electric";}
Hot water system after renovation: a:1:{i:0;s:8:"electric";}
Annual hot water energy usage before renovation (in kWh):
Annual hot water energy usage after renovation (in kWh):
Energy Use Intensity (EUI) of the structure before renovation: n/a
Energy Use Intensity (EUI) of the structure after renovation:
Is the retrofit now using renewable energy sources? no
If using renewable energy, please describe the type, kWh generation and any other system specs:
Were/are any passive house certified materials used? a:1:{i:0;s:4:"none";}
Please describe your reasoning in using certified or non-certified materials: costs
availablity
Door type before renovation: Uninsulated/wood
Door type after renovation: Lemieux double pane
U-value of doors before renovation:
U-value of doors after renovation:
Please describe any methods you're using for controlling thermal bridging, water, vapor and air movement related to doors:
Window type before renovation: Old wood double hung, single pane
Window type after renovation: Jeld-Wen double pane
U-value of windows before renovation:
Please describe any methods you're using for controlling thermal bridging, water, vapor and air movement related to windows: all exterior insulation
nothing specific to windows
Please give this assembly a name (label), if you are entering multiple assemblies:
List all materials in the wall assembly before renovation (please list from outside to inside): 2x4 wood studs/balloon framing
List all materials in the wall assembly after renovation (please list from outside to inside):
R-value of wall assemblies before renovation: 13
R-value of wall assemblies after renovation: 40
Please describe methods for controlling thermal bridging, water, vapor and air movement related to the wall assembly, e.g. materials used and construction: wall section: siding, rain screen, 2 layers exterior taped polyiso ice and water shield on 1x sheathing
added 3" depth to stud wall, dense pack in stud wall
Do you have another assembly to add? no
Please give this assembly a name (label), if you are entering multiple assemblies:
List all materials in the wall assembly before renovation (please list from outside to inside):
List all materials in the wall assembly after renovation (please list from outside to inside) Copy:
R-value of wall assemblies before renovation:
R-value of wall assemblies after renovation:
Please describe methods for controlling thermal bridging, water, vapor and air movement related to the wall assembly, e.g. materials used and construction:
Do you have another assembly to add? --
Please give this assembly a name (label), if you are entering multiple assemblies:
List all materials in the wall assembly before renovation (please list from outside to inside):
List all materials in the wall assembly after renovation (please list from outside to inside):
R-value of wall assemblies before renovation:
R-value of wall assemblies after renovation:
Please describe methods for controlling thermal bridging, water, vapor and air movement related to the wall assembly, e.g. materials used and construction:
Materials in the roof assemblies before renovation: undersized 2x6 wood rafters
Materials in the roof assembly after renovation:
R-value of roof assemblies before renovation: 0
R-value of roof assemblies after renovation: 46
Please describe methods for controlling thermal bridging, water, vapor and air movement related to the roof assembly, e.g., materials and construction: roof section: asphalt shingles, ice and water shield on 1x sheathing,; closed cell foam gussets added to 2x6 framing; dense pack cellulose
Construction makeup of the foundation and ground water/vapor management systems before renovation: Existing failing masonry block, no water/vapor management
Construction makeup of the foundation and ground water/vapor management systems after renovation: Added footings, added interior insulation and vapor barrier
R-value of foundation and ground water/vapor management systems before renovation: 0
R-value of foundation and ground water/vapor management systems after renovation: 18
Please describe any methods for controlling heat, water, vapor, and air movement related to the foundation and ground water/vapor management systems: rebuilt entire perimeter footing, added capillary break below sill beam, added 2 layers taped polyiso to interior side of masonry wall, foam at rim joist; xps and 15 mil vapor barrier below new slab
Ventilation strategy (type and number of ERV or HRV) before renovation: None
Ventilation strategy (type and number of ERV or HRV) after renovation: Venmar 515 ECM
If any make-up air systems were used, please describe: custom damper connected to pressure gauge placed behind refrigerator
Please describe any thermal bridging issues before renovation: No preventative measures against thermal bridging
Please describe strategies to mitigate thermal bridging after the renovation: Full exterior insulation wrap of building
Please describe any moisture issues before renovation: Old, poor flashing, no ground water control, etc.
Please describe the moisture control strategy after renovation: Added: rain screen, air barriers, vapor retarders, vapor barrier at slab, drainage, overhangs
What rough percentage (0 - 100) of the wall assemblies have thermal bridges after renovation? 2
On a scale of 1 to 10, what was the perceived comfort of the structure before renovation? 3
On a scale of 1 to 10, what is the perceived comfort of the structure after renovation? 10
What was the total cost, or estimated cost, of design for the retrofit project (in dollars)? 12-15% of total cost
Total construction cost per square foot, or estimated cost, for the project (in dollars): 330
Total door cost (in dollars):
Total windows cost (in dollars):
Total wall assembly cost (in dollars):
Total roofing cost (in dollars):
Total foundation cost (in dollars):
Total ventilation cost (in dollars):
Roughly what percentage (0 - 100) of the project was financed? 100
If you calculated it, what was the energy return on investment, i.e. the EROI (in dollars)?
On a scale of 1 to 10, how much did you take the EROI into consideration before starting the project (if it was calculated)? 5
What is the expected life of this retrofit (in years)? 100
If you do another retrofit, what would you do differently? Less foam- specifically exterior poly-iso. Would prefer Rockwool or wood fiber insulation instead.
Less concrete in foundation by using a wooden slab 2 layers of ply over insulation
What do you wish you knew before starting the project? Issues of carbon footprint
Any other relevant info or data that we didn’t ask about?
Financing: 2
Local regulations and rules: 1
Technical challenges: 5
Procuring materials: 1
Working with your builder and/or architect: 1
What would you say was the most successful part of the process? The team: It was essential that the client, builder and designer were all on board with the mission and communication was strong between all parties. It was also critical that the builder was very skilled at high performance details.
