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3799 Main St. #87024
Atlanta, GA 30337


Advanced residential construction and home improvement consulting and owner's advocacy in Atlanta, using the latest building performance diagnostic and modeling techniques and tools. Airtightness, insulation, HVAC, ventilation, moisture, and air quality and EMF consulting for homeowners and building professionals alike.


Home performance articles and stories from the field with internationally respected building forensics guru Corbett Lunsford at the Building Performance Workshop. Hear new episodes of the Building Performance Podcast, see new videos from the Home Performance YouTube channel, and learn all about how diagnostic testing (more than an 'Energy Audit') can make home improvement and new home construction a proven process!

Filtering by Category: Architecture

Tuning the Enclosure of our Atlanta Home Build

Corbett Lunsford

Corbett digs into the weather barriers, structures, airsealing and insulation layers of the high performance house in Atlanta, which will be featured in season 2 of the Home Diagnosis TV series.

*CORRECTION: Pango Wrap is 15-mil thick, not 20, but is still a 0.01-perm vapor barrier.

Learn more about these high performance materials:






What We Know About HOMEChem

Corbett Lunsford

If you only learn one video's worth of HOMEChem, this is the one to watch. Hear principal investigators Delphine Farmer and Marina Vance, joined by Lea Hildebrandt Ruiz and Richard Corsi and the rest of the HOMEChem researchers, describe the complexity they uncovered in this seminal study.

More at:

Home Improvement to Tune Performance: Test-In

Corbett Lunsford

Corbett runs a full enclosure diagnostic on a one-story ranch for his family before planning and performing the improvements on vented crawlspace and attic.

Our Atlanta High Performance Home Build Part 1: Basis of Design

Corbett Lunsford

Corbett talks through the basis of design for his family's upcoming house construction in Atlanta, GA. Subscribe to stay tuned for videos during the build! To learn more about the high performance building products being used, click below:

Tour the Off Grid Homestead with Chris Laumer-Giddens

Corbett Lunsford

Last week I made my first site visit to the mountains of North Carolina to start performance testing the #OffGridHomestead. This is an uber-homebuild with LG Squared Architects (now also LG Cubed Builders) and Chris Laumer-Giddens has a lot to show us, even at this rough in stage, with saws running and tractors rumbling around.

2 Years Later: is #TinyLab Still the Highest Performance Tiny House on Wheels?

Corbett Lunsford

Grace and Corbett built the world's highest performance tiny house on wheels in 2016. It was perfect. Then they toured it 13,000 miles across America and let 7,000 people come inside to feel, hear, and smell what perfectly tuned home performance is like.

What's the house performing like now, after all that torture? And under 2 inches of snow in Atlanta, Georgia? See for yourself in this 20-minute tour, complete with testing, demonstrations, and metrics that show Proof Is Possible, even for people who have never built a house before. The #TinyLab is still the undisputed most scientifically superior home performance demonstration in the world, and we sincerely hope others start challenging our work!

Ventilation Innovations at IBS 2018

Corbett Lunsford

Phil Rivas of Fantech shows Corbett around the Fantech booth at the International Builders Show 2018. Demonstrations of Inline Kitchen Exhaust hood with silencer, Energy Recovery Ventilator with balancing registers, HEPA filtration, and Dryer Booster Fans. Learn more at

Tour of the Building Performance Workshop in Atlanta

Corbett Lunsford

Welcome to the inaugural tour of the real life Building Performance Workshop on our high performance homestead in Atlanta, Georgia! From the translucent walls and roof to the airtight, insulated and dessicant dehumidified Dry Vault inside it, everything here is about making the invisible dynamics of building performance visible. Stay tuned for the blower door test, infrared thermal scan, air quality testing, and much more when the Workshop is built!

Testing a Downdraft Kitchen Exhaust Fan

Corbett Lunsford

Home performance diagnostics guru Corbett Lunsford demonstrates the simple test for kitchen exhausts of all types with a smoke pen. See how downdraft exhaust fans work (or don't work) and make a more informed decision on what to do in your own kitchen!

Air Sealing Tape: Proof of 100 Year Durability

Corbett Lunsford

Building performance expert Corbett Lunsford respects proof of performance, and ProClima's airsealing tape has now been proven to him. See Tescon Profil tape that was applied to the subfloor of the #TinyLab as it holds up to 5 months of pure abuse during the construction process.


Corbett Lunsford

Our #TinyLab is a touring tiny house on wheels, which means it takes a lot of abuse as we travel the U.S. on the Proof Is Possible Tour. We’re teaching home performance, showing people how to get diagnostic proof when doing home improvements or building/buying a home.

One of the major problems in the home market is that people just don’t know what they don’t know. They don’t know that air leakage is the biggest problem in their homes, they don’t know that they’re making carbon monoxide every time they use a gas stove, and they don’t know that the formaldehyde in plywood is slowly poisoning their families. That’s what the tour is about.

Because we built the #TinyLab very airtight, almost every visible surface in our home is made of Purebond Formaldehyde-Free Plywood. We didn’t even waste time thinking about air purifiers or other band-aids; if we don’t want toxins in the house, it’s easier if we don’t bring them inside in the first place. We decided to use the Purebond for our Shoji Door to the bathroom, too- faster than using wood framing pieces, and going with a hardware-free sliding door would mean more durability overall. Here’s how the door was built:

1. Cut two sheets of Purebond ½” pre-finished plywood to size, with an extra ½” in each direction. Clamp them face-to-face. Measure and trace the cut-outs on the unfinished top side, putting the extra ½” along just two edges (i.e., bottom and right side) so that the other two edges are your reference 'finished' edges. You'll cut the extra ½” off after the door is assembled, to ensure a flat, straight edge on every side.

2. Cut the two sheets with a jigsaw to create the spaces for the rice paper, and any vents for pressure relief between rooms.

3. Dust the sheets off and stain the interior cuts you just made to match the veneer.

4. Prep your glue table with clamps- lots of them. Cut your rice paper to fit the full span of cut-outs with 1" to spare on each side.  Working fast but thoroughly, spread glue on the unfinished faces of both sheets simultaneously, and sandwich the rice paper between them.

5. Clamp the hell out of the assembled door, making sure the rice paper is taut, the cut-outs line up, and the two finished edges are even.

6. After letting the glue dry, unclamp the double-thickness door and cut the extra ½” away from the two edges, leaving all four edges perfectly even and smooth. Stain the outside edges to match the veneer.

7. Install the Shoji door in the jamb where it will slide (we used a pre-made sliding door frame, and removed the hardware and metal components for wheels) and seat it in a 1/16" waxed groove in the threshold. Attach adhesive felt strips to the pocket jamb to keep the veneer from being scratched.

8. Install the door and the jamb pieces that will lock in the top and closing side- DONE!

How to Insulate a #TinyLab (and any other house)

Corbett Lunsford

Infrared expert Corbett Lunsford uses the FLIR T660 infrared thermal camera to illustrate how insulation was installed in the #TinyLab for optimal control over heat bleed.  For more info about where you can tour the #TinyLab on its 20-city Proof Is Possible Tour, visit: