The house here is about two weeks away from completion. Cabinetry is being crafted and installed, tilework is in, and the exterior shou sugi ban siding is being applied. All the house details are coming together beautifully.
Progress on the Pool
Construction on the Natural Pool by Aquascapes LLC, preparing for the steel inspection next week. The bottom picture shows an original rendering of the pool design by Anthony Archer Wills.
Natural pool dig begins
After a few weeks of unexpected delays, work on extra retaining walls needed to support the pool was completed last week.
Construction on the natural pool has now begun, with Aquascapes and Biotop at the helm. The pool will use a natural water garden to filter the water. The main design and engineered drawings are complete, and we look forward to seeing those concepts materialize.
As workers on the ground create substance from vision, we turn our thoughts to plantings for the water garden, landscaping, and interesting ideas for fencing that will be effective and retain the natural feel of this land. Botanical genius, Anthony Archer Wills is working with us to ensure that the environment emerges with integrity, and that the landscaping will harmonize with the site.
Construction Materials and Air Quality, a Wrap Up
Construction on the Passive House will be complete within the next few weeks. We will then do the final blower door test, followed by the interior fit out, and the house will be complete! It’s been quite a journey from concept to design to construction. We’re all excited to see the final product.
During the process of building this house a review was done for each type of construction material used inside the building envelope, to ensure a clean and nontoxic environment. Working closely with Bill Stratton and our architects at Barlis Wedlick, we compiled a spreadsheet documenting the research on each item.
Previous posts detail concerns with new construction and indoor air quality (Is Green Always Clean?), and list out third party certifiers and IAQ standards (More on IAQ and Making a List). In addition to materials used, this Passive House construction prioritizes a tight building envelope and continually circulating air, which prevents mold growth and keeps the air refreshed and pure. The durability of all materials was considered in addition to their air quality appeal, so that the goals of efficiency and sustainability for the house are also maintained.
Here are just a few of the specific items we have chosen for this Passive House:
- Drywall: Lafarge drywall and joint compound (Greenguard Gold certified)
- Wall paint: Ben Moore Aura (Low VOC). Though there are no-VOC paints available, experienced people have shared that they have more confidence in the performance of this product, and that less coats are required than the no-VOC paints available.
- Construction adhesives: OSI Green Series (Greenguard certified)
- Wood finish: Bona (Greenguard certified)
- Grout: Laticrete (Greenguard Gold certified)
- Plywood for casework, cabinetry: Commonwealth Plywood (suitable for LEED IEQ point, and FSC certified for sustainability)
Materials that are Greenguard certified or that meet the LEED recommendations for Indoor Environmental Quality were generally considered okay in construction of the house.
The UL Sustainable Product Guide is a helpful source for finding products low in Volatile Organic Compounds, or that meet other preferred specifications. Another resource is the Material Safety Data Sheet (MSDS), which usually tells the VOC content (Section 9) and other helpful information about each product, and can generally be downloaded from the manufacturer’s website. Sometimes VOC content is not found on the MSDS, but is contained in other informational sheets. Proper knowledge and application of materials by the construction crew and ventilation is important as well, to protect their safety and to ensure proper curing. Details about maintaining indoor air quality with new construction can be found in the ASHRAE manual, Indoor Air Quality Guide.
A few weeks out from the interior installations at the house.
House Interior Palette Final Decisions
At the house, the floors have been installed and the ceiling begins to go in today. We visit an array of choices to determine final colors for walls, ceiling, floor finish, grout, and more. Subtle distinctions emerge and each selection complements and shifts the spectrum. Each primer, paint, finish, and varnish, respects the integrity of the indoor air quality.
Walls in the house will be a warmer white, and volume masses are to be painted a darker grey. Elaine and Alan show these final selections.
Complementing that, the ceiling color will be a lighter, almost silvery grey paired with the natural iWood finish on the main posts, referencing the iWood posts at the barn.
The kitchen will carry through shades of black, white, and grey, but will add an irreverent hint of color, a citrus grout for the backsplash tile. Shelving will be framed by bent black metal, open or with frosted glass doors, and mounted on tracks that will reference the barn and a ladder track that will extend over the stairs. Layers of metal will repeat for an industrial aesthetic.
The house will offer an invisibility to different features - flush doors and handles, simple hardware that minimally extends, and volumes that contain appliances and other equipment to maintain clean lines throughout. Each room will speak to the next, and the overall feel will be open and airy.
Both bathrooms feature interesting moments.
In contrast to the hues of black and white dominating the house design, each room downstairs will feature a pop of color, either on the ceiling or as an accent wall.
A more complete picture of the house is emerging. As walls are added, somehow the definition gives the sense the space is larger than when it was open. It won’t be long before all of these pieces merge into the magical place the house will surely be.
House Construction on Schedule
There’s a buzz of activity at the house. Electrical and plumbing have been roughed in, roof insulation is in, and exterior siding installation is beginning.
This week the Roxul wool insulation gets installed for the walls, followed by drywall and taping. Roxul is an environmentally-friendly and nontoxic insulation. For drywall, we’re using a LaFarge product that is Greenguard certified.
The team discusses millwork, which will be customized throughout the house. Any plywood used in the carpentry will be Commonwealth Plywood, which meets LEED IAQ standards and is FSC certified.
Here, Eric installs one of the HRV air recovery system.
Flooring installation will begin next week, which will then be finished using a Greenguard certified Bona sealant. We’re researching each product used in the house interior to ensure the highest possible indoor air quality, while also maintaining durability. Subfloor, grout, sealants, all of the above will match the environmental integrity of the house.