Picture a product category with real certifications on the spec sheet whose adjusted value still lands at 70 percent. It earns no point. The documents can be valid while the value-weighted category result falls short, and that gap is where MRc4 estimates go wrong.

This is a reference for how the credit is actually scored in BD+C v5, and why a project full of certified products can still miss the point.

What the credit is worth

  • New Construction: 1 to 5 points.
  • Core and Shell: 1 to 5 points.

One point per qualifying product category, up to 5. The nine eligible categories are all nonstructural: paints and coatings, adhesives and sealants, flooring, walls, ceilings, insulation, furniture, composite wood, and plumbing fixtures. Structural products (concrete, structural steel, load-bearing framing) are out of scope here.

Products are rewarded for demonstrating achievement across five criteria areas: human health, climate health, ecosystem health, social health and equity, and circular economy. The framework is lifted from the mindful MATERIALS Common Materials Framework and the AIA Materials Pledge, so it will feel familiar to anyone who worked the v4.1 material credits.

How a product scores: the multi-attribute score

Each eligible product document earns a score in one or more of the five criteria areas. For the level-based documents in this post, the multipliers are 1x (Level 1), 2x (Level 2), and 3x (Level 3); some content-based pathways, such as biobased or recycled content, use proportional values instead. Add the values across the five criteria areas and you get the product's multi-attribute score (MAS), capped at 5. Within one criteria area only the highest value counts; scores add across different criteria areas, not within one.

The real numbers, from USGBC's scoring table, are the whole story:

  • A product-specific Type III EPD, with no other credited attributes, is MAS 1, climate health only. This is the common case, and it is why "we have EPDs on everything" does not earn the credit.
  • A Health Product Declaration reaches human health Level 2 (MAS 2) only with third-party verification, a 100 ppm inventory, and the specified chemical-avoidance criteria. A Declare label reaches Level 2 only with third-party verification and Red List Free or Red List Approved status. Otherwise both sit at Level 1 (MAS 1).
  • An optimized EPD can reach MAS 5, but the bar is specific: more than a 40 percent GWP reduction, plus more than 10 percent reductions in three additional impact categories, shown through a qualifying comparative assessment. A marketing "low-carbon" claim does not qualify. As an illustration comfortably above the boundary, a comparative EPD showing a 45 percent GWP cut and 15 percent cuts in three other categories clears it.
  • Cradle to Cradle carries its version and scope with it. Full Scope Silver v4.0/v4.1 is MAS 5, but Silver v3.1 is listed as 3+, and a Silver Material Health Certificate on its own is MAS 2. The certificate version is part of the score, not a footnote.

The denominator is every product in the category

Here is the mechanic that decides the point. For each category:

Category adjusted value = 100 x [ sum of (product MAS x product value) ] / (total value of all products in the category)

Value can be cost, area, volume, or unit, used consistently within a category. A category earns its point when that adjusted value exceeds 100 percent. Exactly 100% earns nothing.

The denominator is the whole category. A product with no documentation does not drop out of the math; it sits in the denominator at MAS 0 and drags the percentage down.

The July 31, 2026 addenda clarifies how to assemble that total. The full-category denominator was already in the earlier rating-system equation; the addenda spells out the procedure for building the list. Undocumented products stay in the total. Limited exceptions let nominal-value or unit-incompatible items (fasteners counted against an area-based category, for instance) be omitted or grouped into a functional system, but the substantive products all count.

A worked example

Paints and coatings, valued by cost, total category value $100,000.

  • $50,000 is paint with a qualifying human health Level 2 HPD. Assume its verified MAS is 2, with no other credited attributes.
  • $50,000 is paint nobody documented: MAS 0.

Count only the documented half and the math looks finished:

100 x (2 x 50,000) / 50,000 = 200%

Use the real denominator, the whole category:

100 x (2 x 50,000) / 100,000 = 100%

The threshold is greater than 100 percent, so at exactly 100% the category earns nothing, and one more undocumented gallon puts it under. The naive number said 200 percent. The credit says zero.

What actually clears a category

Documentation alone does not guarantee a point. The value-weighted average MAS has to exceed 1. A category made entirely of basic EPDs sits at exactly 100% (average MAS 1) and still misses.

The math is unforgiving about the undocumented tail. With the rest of a category at MAS 0, a Full Scope Silver v4.0/v4.1 Cradle to Cradle product (MAS 5) has to represent more than 20% of category value to clear it, and exactly 20 percent fails. An MAS 2 product has to exceed 50% of value. Clearing a category means raising the weighted-average score above 1 with Level 2, Level 3, or multi-attribute products, and keeping the undocumented share small enough that it does not cancel them out.

A documented, verifiable example of a high-MAS product: Interface AMS carpet tile on CQuestBio/BioX backing with qualifying Aquafil yarn, certificate 12183, Full Scope Silver v4.1, valid through November 10, 2028. Check any selected product against the certificate's own scope and exclusions before assigning its score. A brand is not a single MAS.

How to work a category

Start with the actual product schedule, not a market impression. For each category, estimate the complete category value, verify which documents each product actually holds and at what level, and compute the weighted score. Prioritize the categories where achievable product substitutions can move the result above 100%, weighing procurement cost and availability. A category is a pass or a miss, so a category you can fully move beats one you can only half-cover.

What trips people up

  • Building the denominator from documented products only. Every substantive product in the chosen category counts, MAS 0 included; only nominal-value or unit-incompatible trivia can be omitted or grouped.
  • Treating an EPD as the finish line. A product-specific Type III EPD is MAS 1, climate health only. It is a floor, not a pass.
  • Forgetting the threshold is greater than 100%. Exactly 100 percent earns nothing.
  • Reading a certificate name without its version and level. Cradle to Cradle Silver is MAS 5 at Full Scope v4.0/v4.1, but 3+ at v3.1 and 2 as a Material Health Certificate. HPD and Declare reach Level 2 only with specific verification and content conditions.
  • Adding scores within one criteria area. Two climate-health documents do not stack; only the highest counts. Scores add across different criteria areas.
  • Assuming full documentation guarantees a point. One category with a verified adjusted value above 100% earns the point; documenting everything to MAS 1 lands at exactly 100 percent and earns nothing.
  • Putting structural products here. MRc4 is nonstructural; the nine categories are the whole scope.

Source: LEED v5 BD+C Rating System, July 2026 Edition, MRc4 Building Product Selection and Procurement at pages 143 to 145, plus the July 31, 2026 addenda (Reference Guide p.415) that details how to assemble the category total. Document scores are from USGBC's resource "Criteria Areas and Achievement Levels in LEED v5" (Building Product Selection and Procurement), version 1.3 (February 2026), the current USGBC download as of September 2026. That scoring table is maintained through the addenda process, so confirm the current values before you submit anything on the strength of a blog post.

MRc4 sits alongside the other v5 credits where the score is not what the spec sheet suggests: see EAc4 Renewable Energy and EAc1 Electrification. The free VERTIQ feasibility check gives an early benchmark estimate across supported BD+C v4, v4.1, and v5, ID+C v4, v4.1, and v5, and O+M v5 profiles; MRc4 submission scoring still needs a complete product inventory and verified documentation: https://vertiq.net/feasibility