LEED projects · Huntsman D-Max Wall

Three LEED-certified buildings, and the wall’s share of the points.

Three of Quebec’s new Maisons des aînés (seniors’ homes) were certified under LEED v4 BD+C: Healthcare with the D-Max Wall. Here is each scorecard, the points earned in the credits the wall takes part in, and a fourth project going up now.

3LEED v4 Healthcare certifications, awarded 2024–2025
SilverRepentigny, 54 points; Longueuil 49 and Alma 46, Certified
15 of 20Optimize Energy Performance points at Longueuil, the most of the three
37–45%of each scorecard earned in credits the wall takes part in

Where the points came from

Points per building, out of 110. Subtract the energy and comfort credits the envelope drives, and each of the three would have scored below the 40 needed to certify.

Energy and comfort credits the envelope drivesMaterials credits the insulation counts towardAll other credits

RepentignySilver · 54

1753254

LongueuilCertified · 49

1842749

AlmaCertified · 46

1252946

Dashed lines: 40 points to certify, 50 for Silver, 60 for Gold.

From the USGBC scorecards linked below. How we counted is explained under the three projects.

Repentigny, Quebec · LEED v4 BD+C: Healthcare

Maison des aînés Repentigny

Silver54 of 110 points · awarded May 2024

1753254

22 of 54 points (41%) were earned in credits the wall takes part in: 17 in energy and comfort credits the envelope drives, 5 in materials credits the insulation counts toward. Without the 17 energy and comfort points the building would have scored 37, below the 40 needed to certify.

Credit	Earned	Where the wall comes in
Optimize energy performance	12 / 20	The envelope is a direct input to the whole-building energy model. On the ASHRAE 90.1-2010 path, 12 points in Healthcare means at least 24% lower energy cost than the baseline (Canadian projects can also use an NECB path with its own thresholds).
Regional priority: optimize energy performance	1 / 1	Awarded with the credit above where the regional threshold is met.
Enhanced commissioning: envelope (Option 2)	2 / 2	Earned 6 of 6 commissioning points. Six is only possible with envelope commissioning (Option 2, 2 points), so those 2 are counted here.
Thermal comfort	1 / 1	The credit requires the HVAC and the building envelope to be designed to ASHRAE 55, where interior surface temperatures and drafts count.
Regional priority: thermal comfort	1 / 1	Awarded with the credit above.
Low-emitting materials	3 / 3	Thermal and acoustic insulation is one of the product categories counted.
Product disclosure: EPD	1 / 2	The insulation can be one of the 20 products from 5 manufacturers.
Product disclosure: material ingredients	1 / 2	Same 20-product count.

Project on USGBC.org Scorecard (PDF)

Longueuil, Quebec · LEED v4 BD+C: Healthcare

Maison des aînés de Longueuil

Certified49 of 110 points · awarded September 2025

1842749

22 of 49 points (45%) were earned in credits the wall takes part in: 18 in energy and comfort credits the envelope drives, 4 in materials credits the insulation counts toward. Without the 18 energy and comfort points the building would have scored 31, below the 40 needed to certify.

Credit	Earned	Where the wall comes in
Optimize energy performance	15 / 20	The envelope is a direct input to the whole-building energy model. On the ASHRAE 90.1-2010 path, 15 points in Healthcare means at least 32% lower energy cost than the baseline (Canadian projects can also use an NECB path with its own thresholds).
Regional priority: optimize energy performance	1 / 1	Awarded with the credit above where the regional threshold is met.
Enhanced commissioning: envelope (Option 2)	0 / 2	Earned 3 of 6 commissioning points: systems commissioning only, so nothing is counted here.
Thermal comfort	1 / 1	The credit requires the HVAC and the building envelope to be designed to ASHRAE 55, where interior surface temperatures and drafts count.
Regional priority: thermal comfort	1 / 1	Awarded with the credit above.
Low-emitting materials	2 / 3	Thermal and acoustic insulation is one of the product categories counted.
Product disclosure: EPD	1 / 2	The insulation can be one of the 20 products from 5 manufacturers.
Product disclosure: material ingredients	1 / 2	Same 20-product count.

Project on USGBC.org Scorecard (PDF)

Alma, Quebec · LEED v4 BD+C: Healthcare

Maison des aînés Alma

Certified46 of 110 points · awarded March 2025

1252946

17 of 46 points (37%) were earned in credits the wall takes part in: 12 in energy and comfort credits the envelope drives, 5 in materials credits the insulation counts toward. Without the 12 energy and comfort points the building would have scored 34, below the 40 needed to certify.

Credit	Earned	Where the wall comes in
Optimize energy performance	8 / 20	The envelope is a direct input to the whole-building energy model. On the ASHRAE 90.1-2010 path, 8 points in Healthcare means at least 16% lower energy cost than the baseline (Canadian projects can also use an NECB path with its own thresholds).
Regional priority: optimize energy performance	0 / 1	Awarded with the credit above where the regional threshold is met.
Enhanced commissioning: envelope (Option 2)	2 / 2	Earned 6 of 6 commissioning points. Six is only possible with envelope commissioning (Option 2, 2 points), so those 2 are counted here.
Thermal comfort	1 / 1	The credit requires the HVAC and the building envelope to be designed to ASHRAE 55, where interior surface temperatures and drafts count.
Regional priority: thermal comfort	1 / 1	Awarded with the credit above.
Low-emitting materials	3 / 3	Thermal and acoustic insulation is one of the product categories counted.
Product disclosure: EPD	1 / 2	The insulation can be one of the 20 products from 5 manufacturers.
Product disclosure: material ingredients	1 / 2	Same 20-product count.

Project on USGBC.org Scorecard (PDF)

How we counted

LEED awards points to the whole building, not to a product, so no scorecard says “these points came from the insulation.” What a scorecard does show is which credits were earned. We counted two groups:

Energy and comfort credits the envelope drives: Optimize Energy Performance (the wall’s U-value and air tightness go straight into the energy model), envelope commissioning where the project earned it, Thermal Comfort, and the regional-priority points awarded with them. The HVAC and lighting design also count toward these.
Materials credits the insulation counts toward: Low-Emitting Materials (thermal insulation is one of the product categories) and the two product-disclosure credits (the insulation can be one of the 20 products). Many other products count toward these too.

So the honest reading is that 37–45% of each scorecard came from credits the wall takes part in, and that the envelope-driven energy and comfort credits were the difference between certified and not certified on all three. Your energy modeler can show the same thing on your project by running it with a code-minimum wall and with the tested D-Max values.

About the foam: in Quebec the D-Max Wall is sprayed with Huntsman’s Heatlok Soya HFO, the foam Huntsman’s case study names for the Maisons des aînés program. In Pennsylvania and Ohio it is sprayed with HEATLOK HFO High Lift or HFO Pro, which have their own U.S. test data and code reports (see the engineers page).

Going up now · pursuing LEED

Îlot Angus, Montreal

350 affordable, eco-responsible homes in four residential buildings at the Technopôle Angus, developed by the Société de développement Angus, with first tenants planned for late summer 2027 (City of Montreal, June 2026). These are photos from the job: the D-Max Wall from bare studs to foamed floors.

Steel studs with horizontal Z-bars across their outside face, around the window bucks — Z-bars across the outside face of the studs, before the sheathing

Inside view before foam: steel studs, Z-bars and the back of the exterior sheathing — From inside, before the foam: studs, Z-bars and the back of the sheathing

A building corner with Z-bars wrapping the steel studs and plywood bucks at the openings — A corner: Z-bars wrap the studs; bucks frame the openings

A mid-rise in winter: cladding on the lower floors, sheathing above, the frame still going up — Winter: cladding below, sheathing above, the frame still going up

A nine-story building with sheathing on every floor and cladding started at the base — Sheathing on every floor while cladding starts at the base

Interior corner: foamed wall on the left, the same wall before spraying on the right — Left: sprayed. Right: the same wall before the foam

A long exterior wall with closed-cell foam filling every stud cavity to the sheathing — Foam fills each cavity to the sheathing, wall to wall

Duct sleeves through the exterior wall, sealed into the foam — Duct sleeves sealed into the foam

Foamed wall with mineral wool at a column and wiring in place — Mineral wool at the column; wiring in place

An open floor with foam on every exterior wall and the windows installed — A finished floor before drywall

Interior furring channels over the foamed wall, around a window — Interior furring over the foam, ready for drywall

Ground floor with foamed exterior walls between concrete columns — Ground floor: foamed walls between the columns

Photos: Îlot Angus job site.

Planning a LEED project?

Send us the wall sections or the energy model targets and we’ll show you where a D-Max wall fits on your scorecard. Or we’ll walk your team through the system in about 45 minutes.

Ask about a project Ask for a walkthrough

Sources

USGBC project directory and LEED v4 BD+C: Healthcare scorecards: Maison des aînés Repentigny (Silver, May 2024), Maison des aînés de Longueuil (Certified, Sep 2025), Maison des aînés Alma (Certified, Mar 2025).
LEED v4 Healthcare credit language via LEEDuser (BuildingGreen): Optimize Energy Performance (8, 12 and 15 points in Healthcare = at least 16%, 24% and 32% for new construction on the ASHRAE 90.1-2010 path), Enhanced Commissioning (Option 2 envelope commissioning, 2 points), Low-Emitting Materials, Thermal Comfort, EPD, Material Ingredients.
Huntsman Building Solutions, Maisons des Aînés et Maisons Alternatives case study (2023): Huntsman closed-cell foam across 46 projects in Quebec.
City of Montreal, press release on L’Îlot Angus, June 18, 2026.