A 21st Century Replacement of a
20th Century Addition to the
19th Century Captain David Pugh House
Contact: Eric Burleyson,
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- Addition replacement at 4517 Capon River Rd, Yellow Spring, WV 26865-9020, Hampshire County, Lat 39.242952, Lon -78.463540, Climate zone 5/N, Elev 860 ft.
- Phase 1, Spring 2014: Existing 20 x 25, 2-story, 1000 sf, c. 1910 addition will be deconstructed, saving as much older lumber as is feasible.
- Phase 2, begin Summer 2014: Construct new 30 x 36, 1½-story, 1300 sf addition: Great Room with cathedral ceiling with a loft on the west side (front/street side of old house) and large arched windows on the east side. Focal highlight of the room is the existing 7-1/2 foot wide stone chimney. Floor to be colored, sealed concrete.
- Access to old house via existing doorways under the loft and from the loft itself; existing doorways to be enlarged to width of original old house window framing (~36″) by 80″ tall. Access to existing first-floor veranda from great room via new sliding doors opening onto veranda north end.
- Bathroom, bedroom, and semi-open galley will under the loft. Loft will have a half-bath, rest will be office/den area (with wood flooring salvaged from old addition). Staircase down from loft to great room.
- Great room is designed using universal design principles and under-loft rooms will be wheelchair accessible. Exterior door on north side within enclosed windowed vestibule and covered ramp (if room, otherwise steps) down to the street side. Internal doors will be pocket doors with no thresholds. Bathroom will be fully ADA-compliant and have a no-threshold, no-door, walk-in shower.
- Heating will be underfloor heating tubes embedded in concrete.
Heat and domestic hot water (DHW) will be a combination of solar hot water, with an LP DHW heater as backup. Solar collectors on roof will feed into large (500 gal? TBD) insulated tank in basement.Update: See Solar Heat Details below for current information. Connections for future zones for hot water radiator/baseboard heat for old house kitchen and guest room will be included. Thermal mass of concrete floor should provide adequate cooling w/o AC, but window AC unit(s) may be needed.
- Full walk-out basement with door under veranda and garage door on east side. Plumbing/hot water components for entire house will be relocated from old cellar alongside new insulated storage tank. PV system controls & batteries will be partitioned off on the west/earth-banked portion with the plumbing – the mechanical room. East/walk-out portion will be a wood/metal shop. A separate storage room with separate roll-up door adjoins under the vestibule.
- Postponed for a later project: PV (most likely not grid-tie) battery electrical system to, at a minimum, power well pump (current 220VAC well pump may be replaced with 12/24 VDC one), underfloor heat circulating pumps, Rooftop solar collector pumps and control, and enough AC power for computer/internet.
Solar Heat Details (click to expand)
The space is a 30′ x 36 great room with full basement and 13′ x 36′ loft. Under the loft are a bathroom, bedroom, and galley kitchenette. The main floor uses ICF construction resulting in a 9″ thick concrete slab with the heat tubing embedded in the middle. This slab also has integrated 8″ x 6″ concrete beams every 2 feet, as detailed here. The basement floor is a 4″ concrete slab with embedded heat tubing; it has 2″ XPS insulation under it and has 2-5/8″ EPS on the edges between it and the foundation.
The underfloor hydronic heat in the addition consists of 3 zones with 4 loops total: basement 1-loop zone, great room 2-loop zone, and under-loft 1-loop zone. Each loop is 300′ 5/8″ PEXa. The expectation is that the great room zone will the most active. The intention is to run each loop at 1.75 gpm, 90°F water in, 75°F out, which should produce 13K BTU/Hr/loop. So the system should produce 26K BTU/hr in “normal” great-room only mode, with an additional 13K each available in the under-loft area and in the basement.
After much internet research, I have decided to go with this system from Duda Diesel. We will be adding the Turn-Key option and upgrading to Freeze Protection tubes so the collectors can handle routine temps below 14°F.
The heating is a open direct system, with a 211 gallon solar storage tank supplying the underfloor hydronic heat, as well as preheating the water for a standard domestic hot water heater. The 211-gallon solar tank has a built-in heat exchange coil for rooftop solar collectors and an electric heating element for backup. It is not at all certain whether the electric backup, combined with the large thermal mass of our insulated suspended concrete slab floor will be sufficient to keep us warm during extended bad winter weather (but I am quite confident that we will remain at most chilly, not frozen!). Our backup plans include the fact that we still have wood stoves in the old house (our only heat for 17 winters.)
The rooftop solar collectors will be evacuated tubes, not traditional flat-plate. The solar side is a closed-loop system with a glycol mixture to prevent freezing. The collectors will mounted on the addition’s east-facing 5/12 pitched (22.62°) metal roof. They will face 11° east of south (the orientation of the house itself) and be tilted up at a 45° angle.
Click on any of the images below to see a larger version:
Underfloor Heat Components [already purchased unless noted otherwise]
- In-floor tubing is Uponor Wirsbo AquaPEX White Tubing 5/8″, 300′ loops
- Rifeng 6-Loop Stainless Steel Radiant Heat Manifold with Thermal Actuators. Four of the six are used for the addition, two are reserved for possible future heat in the old house.
- Taco 6 Zone Valve Control Module with Priority
- (3) Wirsbo Radiant Thermostats [not yet purchased]
- Taco 008 Variable Speed Delta-T Stainless Steel Circulator Pump, 1/25 HP [not yet purchased]
Building Codes (click to expand)
Permitting by Hampshire County, WV Planning Office, inspections by Steve or Mickey of Winchester, VA office of Middle Department Inspection Agency.
- 2012 International Building Code
Including Appendices G – Flood Resistance, and H – Signs
- 2009 International Residential Code
Including Appendices E – Manufactured Housing, F – Radon, and G – Pools, Spas, Hot Tubs
- 2012 International Existing Building Code
- 2012 International Plumbing Code
- 2012 International Mechanical Code
- 2012 International Fuel Gas Code
- 2009 International Energy Conservation Code
- 2009 ICC/ANSI A117.1 Accessible & Usable Buildings
- 2012 International Property Maintenance Code
- 2011 NFPA 70, National Electric Code
Rev A May 2014: The basis for building permit and construction contract
Rev B June 2014: Windows, LP H2O heater, loft closet, Heating Tubes, Geothermal
Rev C Jul/Aug 2014: Tweaked Walls/Stairs/Doors, New Slab and Basement Wall Drawings
Rev D Sept/Oct/Nov 2014: Field changes during construction
location_overview.pdf 03/14/14 7:43pm 1.0 MB
siteplan_trenching.pdf 06/26/14 6:23pm 200 KB
siteplan_landscaping.pdf 06/26/14 6:20pm 205 KB
roof_truss.pdf 08/07/14 4:30pm 197 KB
floorplan_main.pdf 08/11/14 11:28am 268 KB
floorplan_heat.pdf 08/06/14 6:59pm 304 KB
floorplan_loft.pdf 08/08/14 3:16pm 200 KB
floorplan_vestibule.pdf 08/09/14 10:13am 192 KB
floorplan_basement.pdf 08/08/14 2:48pm 216 KB
floorplan_basement_slab.pdf 10/08/14 11:52am 314 KB
floorplan_old_addition_footprint.pdf 06/26/14 12:05pm 173 KB
floorplan_basement_slab.pdf 10/08/14 11:52am 314 KB
floorplan_main_floor_slab.pdf 08/11/14 11:41am 213 KB
elevation_basement_walls.pdf 08/12/14 11:46am 199 KB
elevation_interior_east.pdf 08/07/14 4:36pm 175 KB
elevation_interior_west.pdf 07/23/14 10:33am 208 KB
elevation_interior_north.pdf 08/09/14 10:01am 186 KB
elevation_interior_south.pdf 07/29/14 10:48am 194 KB
elevation_exterior_east.pdf 08/13/14 12:51pm 442 KB
elevation_exterior_west.pdf 08/07/14 2:56pm 218 KB
elevation_exterior_north.pdf 08/07/14 3:31pm 178 KB
Riversdell_Well_Permit.pdf 03/14/14 5:12pm 686 KB
Riversdell_Septic_Inspection.pdf 03/14/14 5:13pm 561 KB
Riversdell_Elevation_Certificate.pdf 03/14/14 5:13pm 1.2 MB