Name
jesper kruse
01/08/2021 20:33
Building company
Maine Passive House
Builder's name
Jesper Kruse
Architecture firm
self
Architect's name
self
Passive building consultant
jesper kruse
Date when the project began or is expected to begin (enter "01" for the day if you only know the month and year)
2015
Type of structure
wood-frame
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
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
Type 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
What were the main goals of the retrofit?
Learning. Comfort. Energy savings.
Was this a registered historic building?
no
Did you use historic tax credits?
no
Total area of the structure (in square feet)
1960
Passive house certified?
no
If certified by another group, please list the organization:
How many months did the renovation take? If ongoing, how many months is the renovation expected to take?
40
Were people living in the building during renovation?
yes
Air tightness (ACH)
3.0ACH50
Energy use intensity (EUI)
Annual electricity usage (kWh)
Annual electricity costs (USD)
720
Annual heat usage (kBtu)
Annual heat costs (USD)
1500
Heat source(s)
existing-boiler, wood-stove
Annual hot water usage (kWh)
Annual hot water cost (USD)
500
Hot water system
other
Air tightness (ACH)
.47ACH50
Energy use intensity (EUI)
Annual electricity usage (kWh)
Annual electricity costs (USD)
1200
Annual heat usage (kBtu)
Annual heat costs (USD)
Heat source(s)
heat-pump, wood-stove
Annual hot water usage (kWh)
Annual hot water cost (USD)
200
Hot water system
air-source-heat-pump
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
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.
U-value of doors before renovation
1.0
U-value of doors after renovation
.15
Window type before renovation
Brosco
Window type after renovation
Ecliptica
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)
U-value of windows before renovation
.5
U-value of windows after renovation
.11
Materials in the wall assembly before renovation (listed from outside to inside)
2x6, 1/2" OSB, dense packed cellulose
Materials in the wall assembly after renovation (listed from outside to inside)
2x6, .5" OSB, 3.5" Larsen truss
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
R-value of wall assemblies before renovation
23
R-value of wall assemblies after renovation
65
What rough percentage (0 - 100) of the wall assemblies have thermal bridges after renovation?
0
Materials in the roof assemblies before renovation
loose fill cellulose
Materials in the roof assembly after renovation
loose fill cellulose
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)
R-value of roof assemblies before renovation
60
R-value of roof assemblies after renovation
136
Please upload up to four images of the structure and/or retrofit
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
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)?
1000 (self)
Total construction cost per square foot, or estimated cost, for the project (in dollars)
$81/sf
Roughly what percentage (0 - 100) of the project was financed?
0
What types of funding did you use?
personally-funded
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 ventilation cost (in dollars)
6,000
Total foundation cost (in dollars)
5,000
What is the expected life of this retrofit (in years)?
75
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)?
Please upload up to four images of the structure and/or retrofit
What would you say was the most successful part of the process?
wall assembly was very straight forward.
Rate the following in terms of difficulty...
Section 1: Contact
The first section is just to get your contact info...
Working with your builder and/or architect
Procuring materials
Technical challenges
Local regulations and rules
Financing
What do you wish you knew before starting the project?
total cost
If you do another retrofit, what would you do differently?
not do a phased project
Any additional notes or comments