Your Name: Alan GIbson
Email Address: alan@gologic.us
Phone:
May we contact you about your entry in the future? Yes
If yes, which contact method do you prefer? email
Your building company: GO Logic
Your builder's name: Alan Gibson
Your architecture firm: GO Logic
Your architect's name:
Passive building consultant: Alan Gibson
Street address of the retrofit:
Town or city: Belfast
State or province: ME
Original construction year: 1870
Year when passive building work was or will be completed: 2021
Lot type: suburban
Type of structure: wood-frame
Building use type: residential
Brief description of the retrofit project: Demolished existing ell and rebuilt it and renovated existing main house.
Why did you choose to do a whole, partial, or phased retrofit? Need to be renovated and budget allowed. Owner driven.
Total area of the structure (in square feet): 2640
Total renovated area of the retrofit project (in square feet) : 2640
Date when the project began or is expected to begin (enter "01" for the day if you only know the month and year): 01/07/2019
How many months did the renovation take? If ongoing, how many months is the renovation expected to take? :
What were the main goals of the retrofit? Were these goals driven by you, a client or both? : Leave as much exiting structure and interior finishes- insulate and air seal existing structure. Triple glazed windows and doors all new exterior finishes
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: n/a
Air tightness (ACH) before renovation: 20
Air tightness (ACH) after renovation:
Total annual electricity costs before renovation (in dollars):
Total annual electricity costs after renovation (in dollars):
Total annual electricity usage before renovation (in kWh):
Total annual electricity usage after renovation (in kWh):
Total annual heat costs before renovation (in dollars):
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):
Annual hot water cost after renovation (in dollars):
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? 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:0:{}
Please describe your reasoning in using certified or non-certified materials: didn't really come up
Door type before renovation: typical uninsulated exterior door
Door type after renovation: Kneer-Sud
U-value of doors before renovation:
U-value of doors after renovation: .16
Please describe any methods you're using for controlling thermal bridging, water, vapor and air movement related to doors: over insulation of frame, air sealed to rough opening
Window type before renovation: single pane double hung, wood
Window type after renovation: triple glazed pvc
U-value of windows before renovation: 1
Please describe any methods you're using for controlling thermal bridging, water, vapor and air movement related to windows: installed in middle of the wall assembly, air sealed, sill pan
Please give this assembly a name (label), if you are entering multiple assemblies: existing house
List all materials in the wall assembly before renovation (please list from outside to inside): 2x4, insulated with old style foam
List all materials in the wall assembly after renovation (please list from outside to inside): added 6" EPS to exterior. Added dense packed cellulose to renovated walls, loads of loose cellulose to attic
R-value of wall assemblies before renovation: 10
R-value of wall assemblies after renovation: 34
Please describe methods for controlling thermal bridging, water, vapor and air movement related to the wall assembly, e.g. materials used and construction: New layer of air sealed sheathing, continuous exterior insulation, rain screen, siding, trim
Do you have another assembly to add? yes
Please give this assembly a name (label), if you are entering multiple assemblies: New Ell
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: 2x6 wall, sheathing, 6" EPS, rain screen, siding, trim
R-value of wall assemblies before renovation: 10
R-value of wall assemblies after renovation: 43
Please describe methods for controlling thermal bridging, water, vapor and air movement related to the wall assembly, e.g. materials used and construction: New layer of air sealed sheathing, continuous exterior insulation, rain screen, siding, trim
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: wood frame, some fiber glass insulation in attic
Materials in the roof assembly after renovation: wood frame, loose fill and dense packed cellulose
R-value of roof assemblies before renovation: 20
R-value of roof assemblies after renovation: 60
Please describe methods for controlling thermal bridging, water, vapor and air movement related to the roof assembly, e.g., materials and construction: New metal roof, vented
Construction makeup of the foundation and ground water/vapor management systems before renovation: existing stone foundation, full basement
Construction makeup of the foundation and ground water/vapor management systems after renovation: in new ell poured concrete with 6" EPS on the exterior of new foundation, footing drains
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: 25
Please describe any methods for controlling heat, water, vapor, and air movement related to the foundation and ground water/vapor management systems: New air/vapor barrier and foam below slab in ell.
French drain (trench) around existing perimeter.
Ventilation strategy (type and number of ERV or HRV) before renovation: exhaust only fans.
Ventilation strategy (type and number of ERV or HRV) after renovation: Zehnder ERV CA350Q
If any make-up air systems were used, please describe:
Please describe any thermal bridging issues before renovation: through out building assemblies
Please describe strategies to mitigate thermal bridging after the renovation: Continuous exterior insulation at walls and new foundation
Please describe any moisture issues before renovation: definite presence of moisture in basement.
moisture related rot to basement framing
Please describe the moisture control strategy after renovation: structure much more airtight and added the ERV.
What rough percentage (0 - 100) of the wall assemblies have thermal bridges after renovation? 5
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?
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): 203
Total door cost (in dollars): 6000
Total windows cost (in dollars): 26.700
Total wall assembly cost (in dollars):
Total roofing cost (in dollars): 18.000
Total foundation cost (in dollars): 7.700
Total ventilation cost (in dollars): 8200
Roughly what percentage (0 - 100) of the project was financed?
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)? 1
What is the expected life of this retrofit (in years)? 100
If you do another retrofit, what would you do differently? Remove existing foundation under the ell. Thought we could make it work, but the actual condition required a whole new foundation. Completely renovate the bathrooms from the beginning.
What do you wish you knew before starting the project? More comprehensive design process at the beginning.
Any other relevant info or data that we didn’t ask about? The success of the project was unifying the design and program, while modernising the house to fit contemporary lifestyle.
Financing: 8
Local regulations and rules: 4
Technical challenges: 5
Procuring materials: 5
Working with your builder and/or architect: 10
What would you say was the most successful part of the process? Preserving existing old structure which had architectural integrity, while adding new space at a passive level.
