Carlsson Family Home
Walls and Roof
Rebuilt the entire shell and thermal boundary to increase insulation values and tighten the air barrier.
Subslab assembly
6" EPS foam
Subslab R-value
24.0
Slab edge assembly
3" EPS foam
Slab edge R-value
12.0
Foundation wall assembly
The home was lifted off of its old foundation and excavated to increase its footprint. A new foundation and slab were poured with 3” exterior EPS foam to the outside of the foundation walls, and 6” of EPS insulation under the slab and footings. The home was placed back down and the original first and second story floor systems were preserved.
Foundation wall R-value
12.0
Above grade wall assembly
All existing 2x4 walls were furred out to 5.5” and new walls were all 2x6 construction. These were sheathed with Zip System sheathing, and the joints and seams were sealed with the Prosoco liquid flash system. To the exterior of the sheathing, Birdsmouth added 2” of cork insulation followed by a fully vented rainscreen assembly and cedar lap siding. The interior wall cavities were filled with 5.5” of dense pack cellulose.
Above grade wall R-value
28.0
Cathedral ceiling assembly
The roof assembly was built from 2x12 rafters, which the wall sheathing went up and over. This allowed for dense pack cellulose in the vaulted ceilings. Over the sheathing, which acted as the primary vapor control layer and the air barrier, 2x6 rafters were installed to create a space for 3.5” of rockwool insulation and a vent space. The tails ran long over the wall plane to create the overhangs for the building. This was then sheathed and a metal roof was installed. Soffit vents and a ridge vent provided for ventilation of these cavities.
Cathedral ceiling R-value
44.0
Windows and Doors
Window Assembly:
Triple pane, wood/clad Zola windows and doors were used, including 3 large lift slide units. The average U value of the windows is U.12. The windows were installed into the rough openings with Hanno Band expanding foam tape.
Door Assembly:
wood/clad Zola doors
Average window U-factor
0.12
Door U-Factor
0.14
Door Area
38 sq ft
Mechanical Systems
Space cooling - Manufacturer & Model
DHP
Space heating - Manufacturer & Model
DHP
Domestic hot water - Manufacturer & Model
Electric
Domestic hot water - capacity
66 gal
Ventilation - Manufacturer & Model
Zehnder Comfo Air HRV
Lighting Manufacturer and Model
Lighting Efficiency
100%
Mechanical Equipment Installation Details and Comments
Blower door test performed on home. HRV balanced and commissioned.
Envelope
Air Changes per hour, ACH50
0.54 ACH50
Air Changes per hour, CFM50
Walls and Roof
Rebuilt the entire shell and thermal boundary to increase insulation values and tighten the air barrier.
| Subslab assembly |
6" EPS foam |
|---|---|
| Subslab R-value | 24.0 |
| Slab edge assembly |
3" EPS foam |
| Slab edge R-value | 12.0 |
| Foundation wall assembly |
The home was lifted off of its old foundation and excavated to increase its footprint. A new foundation and slab were poured with 3” exterior EPS foam to the outside of the foundation walls, and 6” of EPS insulation under the slab and footings. The home was placed back down and the original first and second story floor systems were preserved. |
| Foundation wall R-value | 12.0 |
| Above grade wall assembly |
All existing 2x4 walls were furred out to 5.5” and new walls were all 2x6 construction. These were sheathed with Zip System sheathing, and the joints and seams were sealed with the Prosoco liquid flash system. To the exterior of the sheathing, Birdsmouth added 2” of cork insulation followed by a fully vented rainscreen assembly and cedar lap siding. The interior wall cavities were filled with 5.5” of dense pack cellulose. |
| Above grade wall R-value | 28.0 |
| Cathedral ceiling assembly |
The roof assembly was built from 2x12 rafters, which the wall sheathing went up and over. This allowed for dense pack cellulose in the vaulted ceilings. Over the sheathing, which acted as the primary vapor control layer and the air barrier, 2x6 rafters were installed to create a space for 3.5” of rockwool insulation and a vent space. The tails ran long over the wall plane to create the overhangs for the building. This was then sheathed and a metal roof was installed. Soffit vents and a ridge vent provided for ventilation of these cavities. |
| Cathedral ceiling R-value | 44.0 |
Windows and Doors
Window Assembly:
Triple pane, wood/clad Zola windows and doors were used, including 3 large lift slide units. The average U value of the windows is U.12. The windows were installed into the rough openings with Hanno Band expanding foam tape.
Door Assembly:
wood/clad Zola doors
| Average window U-factor | 0.12 |
|---|---|
| Door U-Factor | 0.14 |
| Door Area | 38 sq ft |
Mechanical Systems
| Space cooling - Manufacturer & Model | DHP |
|---|---|
| Space heating - Manufacturer & Model | DHP |
| Domestic hot water - Manufacturer & Model | Electric |
| Domestic hot water - capacity | 66 gal |
| Ventilation - Manufacturer & Model | Zehnder Comfo Air HRV |
| Lighting Manufacturer and Model | |
| Lighting Efficiency | 100% |
| Mechanical Equipment Installation Details and Comments |
Blower door test performed on home. HRV balanced and commissioned. |
Envelope
| Air Changes per hour, ACH50 | 0.54 ACH50 |
|---|---|
| Air Changes per hour, CFM50 |