Building Products · Historic Preservation
Heirloom Windows: The Visibility Arbitrage in a Specifier Market
Heirloom Windows
16
competitors profiled across three tiers (4 / 7 / 5)
8 of 12
specifier attributes where the product scores best-in-class
15.4%
CAGR of the adaptive-reuse market it rides ($22B → $94.4B)
1 of 6
visibility channels the brand registers on — the whole problem
Situation
Heirloom Windows makes historic-preservation windows for one of the most exacting corners of building products — landmark and adaptive-reuse buildings, where a window must satisfy the owner, the architect who specifies it, and the preservation regulator who approves it. On product substance, Heirloom had done the hard part: best-in-class materials, a vacuum-insulating glazing option, a no-jamb-modification install, and a 50-year warranty. What it had not built was visibility in the narrow world of people who write specifications.
Three macro tailwinds all route demand through preservation specifiers in Heirloom’s favor — a $6.15B federal historic-tax-credit year, an adaptive-reuse market compounding at 15.4%, and embodied-carbon and labor pressures. The question was why a category-leading product wasn’t converting that demand. The answer turned out to be structural, not about the window at all.
The engagement
CMA ran a Phase 1 research and positioning engagement — a full competitive scan and an ecosystem map — built to convert “we have a great product” into “here is exactly where we stand and how we win the spec.”
The map: best product, worst visibility
Profiling 16 competitors across three tiers and scoring each on the attributes that decide a window specification produced a sharp, useful finding. Heirloom’s product is best-in-class on 8 of 12 attributes — more than any single competitor. But on visibility — presence in the specification tools, conferences, and firm relationships where specs get written — it registers on just 1 of 6 channels, while the leading boutique competitors score 6 of 6. Plotted on the two axes that matter, Heirloom sits alone in the corner no competitor occupies: product-rich and unseen.
The competitive read tiered the field cleanly — and located exactly where the contest is: the boutique Tier B specialists Heirloom must out-visible, not the national Tier A mills.
The audience, bounded and reachable
A specifier market, unlike a consumer one, is finite and knowable — and that is an advantage if you map it. The ecosystem map bounded the buyer population from the top down: 800–1,200 specifier organizations nationally, ~350–500 active firms in the priority geographies, and ~80–120 realistically reachable inside twelve months — against a concrete conversion target of six master-spec inclusions in 2026.
Why the structure mattered
The discipline was to treat visibility as the product problem it actually is. Most building-products companies over-invest in the product and assume specification follows; in a regulator-gated, relationship-driven category it doesn’t. Scoring the product and the visibility gap in one engagement is what turned a vague “we should market more” into a targeted answer: cede owner-facing search to the national mills, and contest the specifier channels — a 120-firm architect database, a five-pillar message, and a five-touch sequence — where the boutique leaders are beatable.
Impact
Heirloom left Phase 1 with what a category leader most needs when it’s under-known: a tiered competitive map, an evidenced position (best-in-class on 8 of 12, but 1-of-6 on visibility), and a named, reachable population of specifiers — plus the reframe that its growth runs through outreach and credibility, not reinvention. The company now knows not just that it has the better window, but exactly how to make the people who write specs know it too.
In a specifier market, the best product doesn't win — the specifiable one does. The gap was never the window; it was who knew to write it in.
Engagement details are shared with client permission or presented in anonymized form. Results described are specific to the engagement and client circumstances shown and are not a guarantee of future outcomes. See our full disclaimer.
The Transformation
Before & after
Before
A category-leading window losing, quietly, to lesser-known rivals.
After
A scored map proving best-in-class product but bottom-tier visibility.
Before
'We should market more' as a vague instinct.
After
A visibility-arbitrage thesis — the gap is reach, not the product.
Before
An unbounded 'preservation market.'
After
A bottom-up funnel — 800–1,200 orgs down to 80–120 reachable firms.
Before
Hope that quality gets discovered.
After
A named target: six master-spec inclusions in 2026.
The Work, In Sequence
How the engagement ran
- 1
Competitive & positioning scan
16 competitors profiled across three tiers and scored on the 12 attributes that decide a window specification — establishing that the product leads on 8 of 12 while sitting at the bottom of the visibility field.
- 2
The preservation ecosystem map
A bottom-up sizing of the reachable audience: 800–1,200 specifier organizations nationally, ~350–500 active firms in target geographies, and ~80–120 realistically reachable inside twelve months — riding a 15.4%-CAGR adaptive-reuse wave.
- 3
The path to specifier-driven flow
A reframe from product to visibility: a 120-firm architect database, a five-pillar message, and a five-touch outreach sequence aimed at a concrete target — six master-spec inclusions in 2026.