Heirloom Windows: Mapping a Specifier-Driven Market

Situation

Heirloom Windows makes historic-preservation windows for one of the most exacting corners of building products: replacing and restoring windows in landmark and adaptive-reuse buildings, where a product must satisfy not just the owner but the architect who specifies it and the preservation regulator who approves it. The company had done the hard part — built a genuinely category-leading product. What it had not yet built was visibility in the narrow world of people who write specifications.

That gap is the whole problem in a specifier-driven, regulator-gated category. These windows aren’t bought off a shelf or won with a sales funnel. An architect writes a specific product into a project’s construction documents months before anyone orders anything, and that decision runs on credibility and relationships, not clicks. A superior product with weak specifier visibility loses, quietly, to a lesser product that shows up in the tools, conferences, and firms where specs get written. Heirloom needed to know, precisely, where it stood — and what to do about it.

The engagement

CMA ran a Phase 1 research and positioning engagement built to convert “we have a great product” into “here is exactly where we stand and how we win the specification.”

The competitive & positioning scan

The first deliverable profiled sixteen competitors across three tiers, each scored on the attributes that actually decide a window specification — the technical, performance, and preservation-fit characteristics a specifier weighs. The finding was sharp and useful: Heirloom’s product is best-in-class on 8 of 12 specifier-relevant attributes, yet sits at Tier-C visibility while several rivals with lesser products enjoy Tier-B reach. The competitive arbitrage was clear — close the visibility gap before a larger incumbent expands into Heirloom’s product space.

The preservation ecosystem map

The second deliverable mapped the market itself — because you can’t build an outreach plan for a category you haven’t structured. It sized the demand engine beneath the business (the federal historic-tax-credit investment and the fast-growing U.S. adaptive-reuse market, projected to compound at roughly 15.4% a year), and — more operationally useful — it bounded the buyer population: an estimated 800–1,200 named preservation architecture firms in the serviceable market, of which roughly 100–150 high-priority specifiers are realistically reachable within twelve months. A specifier market, unlike a consumer one, is finite and knowable — and that is an advantage, if you map it.

The path to specifier-driven flow

The engagement’s conclusion reframed the whole challenge: the work ahead is translation and outreach, not invention. Heirloom didn’t need a better product; it needed the credibility infrastructure — presence in the specification tools, conferences, and firm relationships — that turns a superior product into written specifications. Phase 1 defined that path and prioritized the firms to reach first.

Why the structure mattered

The framing decision was to treat visibility as the product problem it actually is. Most building- products companies over-invest in the product and assume specification will follow; in a regulator-gated, relationship-driven category it doesn’t. Mapping the competition and the ecosystem in one engagement is what turned a vague “we should market more” into a targeted, sequenced answer: which position Heirloom owns, which firms decide its fate, and what to build to reach them.

Impact

Heirloom Windows left Phase 1 with what a category leader most needs when it’s under-known: a tiered competitive map, an evidenced market position, and a named, reachable population of specifiers — plus the conclusion that its path to 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.