Your Name: jesper kruse
Email Address: jesper@mainepassivehouse.com
Phone: 2078903203
May we contact you about your entry in the future? Yes
If yes, which contact method do you prefer? email
Your building company: Maine Passive House
Your builder's name: Jesper Kruse
Your architecture firm: self
Your architect's name: self
Passive building consultant: jesper kruse
Street address of the retrofit:
Town or city: greenwood
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 membrances, triple pane windows, Lunos Ventilation
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): 2015
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: 3.0ACH50
Air tightness (ACH) after renovation: .47ACH50
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):
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): 500
Annual hot water cost after renovation (in dollars): 200
Hot water system before renovation: a:1:{i:0;s:5:"other";}
Hot water system after renovation: a:1:{i:0;s:20:"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? a:1:{i:0;s:5:"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: 1.0
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
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
Do you have another assembly to add? yes
Please give this assembly a name (label), if you are entering multiple assemblies: 15% over porch
List all materials in the wall assembly before renovation (please list from outside to inside): 2x6, 1/2" OSB, dense packed cellulose
List all materials in the wall assembly after renovation (please list from outside to inside) Copy: 2x6, .5" OSB, 3.5" Larsen truss
R-value of wall assemblies before renovation: 23
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: DA MEMBRANE OVER OLD osb, Mento plus over Larsen Trusses, rain screen
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):
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: 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: 10 below slab r40 on frost walls
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? 6
On a scale of 1 to 10, what is the perceived comfort of the structure after renovation? 9
What was the total cost, or estimated cost, of design for the retrofit project (in dollars)? 1000 (self)
Total construction cost per square foot, or estimated cost, for the project (in dollars): $81/sf
Total door cost (in dollars): 5000
Total windows cost (in dollars): 20000
Total wall assembly cost (in dollars): 75,000
Total roofing cost (in dollars): 15,000
Total foundation cost (in dollars): 5,000
Total ventilation cost (in dollars): 6,000
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)? 0
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: 5 (difficult)
Local regulations and rules: 1
Technical challenges: 2-3
Procuring materials: 1
Working with your builder and/or architect: 1
What would you say was the most successful part of the process? wall assembly was very straight forward.
