Your name
Jesper Kruse
Your building company
Maine Passive House
Your builder's name
Jesper Kruse
Your architecture firm
Maine Passive House
Your architect's name
Jesper Kruse
Passive building consultant
Jesper Kruse
State or province
Maine
Original construction year
2000
Year when passive building work was or will be completed
2020
Lot type
rural
Type of structure
wood-frame
Building use type
residential
Brief description of the retrofit project
2x6 walls. Added 9.5" TJI to outside of 2x6 walls. Airtight membranes, triple pane windows, Lunos Ventilation
Scope of retrofit
phased-retrofit
Why did you choose to do a whole, partial, or phased retrofit?
Needed new windows and new siding. I'm a PH builder so walking the talk.
Total area of the structure (in square feet)
1960
Total renovated area of the retrofit project (in square feet)
1960
Date when the project began or is expected to begin (enter "01" for the day if you only know the month and year)
20/05/2023
How many months did the renovation take? If ongoing, how many months is the renovation expected to take?
40
What were the main goals of the retrofit? Were these goals driven by you, a client or both?
Learning. Comfort. Energy savings.
Were people living in the building during renovation?
yes
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
Air tightness (ACH) after renovation
Total annual electricity costs before renovation (in dollars)
720
Total annual electricity costs after renovation (in dollars)
1200
Total annual electricity usage before renovation (in kWh)
Total annual electricity usage after renovation (in kWh)
Total annual heat costs before renovation (in dollars)
1500
Total annual heat costs after renovation (in dollars)
0
Total annual heat usage before renovation (in kBtu)
Total annual heat usage after renovation (in kBtu)
Heat source(s) before renovation
existing-boiler, wood-stove
Heat source(s) after renovation
heat-pump, wood-stove
Annual hot water cost before renovation (in dollars)
500
Annual hot water cost after renovation (in dollars)
200
Hot water system before renovation
other
Hot water system after renovation
air-source-heat-pump
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
Energy Use Intensity (EUI) of the structure after renovation
Is the retrofit now using renewable energy sources?
yes
If using renewable energy, please describe the type, kWh generation and any other system specs
solar/ 51 panels/17kwh
Were/are any passive house certified materials used?
walls
Please describe your reasoning in using certified or non-certified materials
Availability. What we have used on other projects. Price
Door type before renovation
Wood
Door type after renovation
Ecliptica
U-value of doors before renovation
1
U-value of doors after renovation
.15
Please describe any methods you're using for controlling thermal bridging, water, vapor and air movement related to doors
DA membrane outside of 2x6. Larsen trusses (I joist) Mento Plus as WRB. Intello down low in attic. Mento over the roof.
Window type before renovation
Brosco
Window type after renovation
Ecliptica
U-value of windows before renovation
.5
U-value of windows after renovation
.1
Please describe any methods you're using for controlling thermal bridging, water, vapor and air movement related to windows
Contega Solido Exo and SL (outside tape and inside tape)
Please give this assembly a name (label), if you are entering multiple assemblies
85% Assembly #1
List all materials in the wall assembly before renovation (please list from outside to inside)
2x6, 1/2" OSB, dense blown cellulose
List all materials in the wall assembly after renovation (please list from outside to inside)
2x6, 1/2" OSB, 9.5" I joist, Dense Blown Cellulose
R-value of wall assemblies before renovation
23
R-value of wall assemblies after renovation
65
Please describe methods for controlling thermal bridging, water, vapor and air movement related to the wall assembly, e.g. materials used and construction
DA MEMBRANE OVER OLD osb, Mento plus over TJIs, rain screen
Materials in the roof assemblies before renovation
loose fill cellulose
Materials in the roof assembly after renovation
loose fill cellulose
R-value of roof assemblies before renovation
60
R-value of roof assemblies after renovation
136
Please describe methods for controlling thermal bridging, water, vapor and air movement related to the roof assembly, e.g., materials and construction
intello on bottom cord of trusses, mento plus over top of roof (hot attic)
Construction makeup of the foundation and ground water/vapor management systems before renovation
slab inside a frost wall 2" XPS, below slab
Construction makeup of the foundation and ground water/vapor management systems after renovation
slab inside a frost wall 2" XPS, below slab, 10" EPS on frost walls
R-value of foundation and ground water/vapor management systems before renovation
10
R-value of foundation and ground water/vapor management systems after renovation
Please describe any methods for controlling heat, water, vapor, and air movement related to the foundation and ground water/vapor management systems
Ventilation strategy (type and number of ERV or HRV) before renovation
bathroom fans and kitchen vent hood
Ventilation strategy (type and number of ERV or HRV) after renovation
Lunos E2 and Lunos Ego
If any make-up air systems were used, please describe
dedicated air for wood stove
Please describe any thermal bridging issues before renovation
studs in walls, foundation, low heel trusses
Please describe strategies to mitigate thermal bridging after the renovation
exterior foam at foundation, small foam piece at wall/roof connection
Please describe any moisture issues before renovation
on windows
Please describe the moisture control strategy after renovation
appropriate membranes and airtightness, mechanical ventilation
What rough percentage (0 - 100) of the wall assemblies have thermal bridges after renovation?
0
On a scale of 1 to 10, what was the perceived comfort of the structure before renovation?
On a scale of 1 to 10, what is the perceived comfort of the structure after renovation?
What was the total cost, or estimated cost, of design for the retrofit project (in dollars)?
Total construction cost per square foot, or estimated cost, for the project (in dollars)
Total door cost (in dollars)
5000
Total windows cost (in dollars)
20000
Total wall assembly cost (in dollars)
Total roofing cost (in dollars)
Total foundation cost (in dollars)
Total ventilation cost (in dollars)
What types of funding did you use?
personally-funded
Roughly what percentage (0 - 100) of the project was financed?
0
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)?
What is the expected life of this retrofit (in years)?
75
If you do another retrofit, what would you do differently?
not do a phased project
What do you wish you knew before starting the project?
total cost
Any other relevant info or data that we didn’t ask about?
Financing
Local regulations and rules
Technical challenges
Procuring materials
Working with your builder and/or architect
What would you say was the most successful part of the process?
wall assembly was very straight forward.
