Short answer: A building product manufacturer's sales team needs four functions, whether or not they are four separate people: project qualification (deciding what to pursue), specification work (getting named in the documents), commercial closing (converting the specification into an order), and key account management (developing repeat relationships with practices, developers and contractors). The most common structural mistake is having only the third, and wondering why the pipeline is thin and price-driven.
The four functions
1. Project qualification
Job: turn a stream of potential projects into a short list worth working. Assess relevance to the portfolio, project stage, commercial size, access to the deciding role, and existing relationships. Disqualify hard and record why.
Usually sits with: inside sales, or a dedicated qualification desk. In smaller teams it falls to field reps, which is where it quietly fails — a rep will always prioritise the project in front of them over the one they have not researched yet.
2. Specification work
Job: get the product named or approved in project documents. Works with architects and specialist planners during design. Technical consulting more than negotiation.
Usually sits with: specification managers. Measured on specification rate, not on booked revenue — which requires reporting that most manufacturers do not have.
3. Commercial closing
Job: convert a specification into an order. Works with contractors, subcontractors and distributors after award. Handles substitution risk, pricing and delivery.
Usually sits with: field sales.
4. Key account management
Job: develop repeat relationships with practices, developers and contractors that recur across many projects. A practice that specifies you three times is worth more than three unrelated projects.
Usually sits with: senior field sales or a dedicated KAM function.
Three workable structures
Small team (3–8) | Mid-size (8–25) | Large (25+) | |
|---|---|---|---|
Qualification | Shared, one inside sales person | Inside sales desk | Inside sales team, by region |
Specification | Field reps do both | Separate specification managers | Specification managers by segment |
Closing | Field reps | Field reps by territory | Field sales by territory |
Key accounts | Sales lead | Senior reps | Dedicated KAM |
Main risk | Qualification neglected | Handover between spec and closing | Coordination overhead |
The pattern to notice: qualification is the first function to be added and the last to be recognised as a function. Manufacturers usually hire another field rep when the actual constraint is that nobody is deciding what the existing reps should work on.
Territory: geography or segment?
Geographic split is the default. It works when travel is the dominant cost and product complexity is low.
Segment split — by building type or product category — works when technical depth matters. A rep who knows healthcare projects deeply will outperform a generalist on healthcare, even at longer travel distances.
Practice-based split for specification work specifically. If an architecture practice designs projects in five regions, the relationship should sit with one person, not five. This is the split most manufacturers get wrong: they route design-stage projects by postcode, which fragments exactly the relationships that compound.
A reasonable hybrid: geography for closing, segment or practice for specification.
The handovers that break
Qualification to specification. A project qualified but never assigned sits. Every qualified project needs a named owner and a next step on the day it is qualified.
Specification to closing. The most expensive break in the chain. A specification manager wins a specification, the project goes quiet for a year, it reaches tender, and nobody tells field sales. A competitor is substituted, and the loss is discovered when the order does not arrive.
Fixing this requires two things: specification recorded as an explicit CRM milestone, and automatic notification when a specified project changes stage. Jeane, the intelligence inside Building Radar, monitors project stage changes and flags specified projects entering procurement, which is exactly the moment substitution risk becomes live.
Closing to key accounts. A won project should feed the practice relationship. Which specifier decided, on what basis, against which competitors — that context is routinely lost at the handover and is exactly what makes the next project easier.
When to add inside sales
Add a qualification desk when field reps spend more than roughly a quarter of their week on research and list building, when qualified projects sit unassigned, or when you cannot state how many relevant projects exist in your market.
One inside sales person can typically support three to five field reps, depending on how much of the qualification is automated. With product-level scoring and decision-maker contacts arriving pre-populated, the ratio improves substantially — the desk moves from researching to deciding.
Sizing the field team
Work backwards from project capacity rather than from territory size:
A rep can meaningfully carry 40–80 active projects, depending on cycle length and product complexity
Sustained relationships with roughly 30–60 practices or accounts
Beyond that, follow-up quality degrades before anyone notices, because in long-cycle sales the failure is silent
If your market contains 600 relevant projects a year and you can realistically pursue 15%, that is 90 projects — around two field reps plus qualification support, not one rep working harder.
Frequently asked questions
Do we need specification managers if we have field sales? If your product is decided at design stage by an architect or planner, yes. If it is decided at procurement by a subcontractor, field sales covers it.
How many projects can one rep handle? Typically forty to eighty active projects, depending on complexity and cycle length.
Should territories be geographic or by segment? Geographic for closing work, segment or practice-based for specification work. Routing design-stage projects by postcode fragments practice relationships.
When should a manufacturer add inside sales? When field reps spend a significant share of the week on research, or when qualified projects go unassigned. The trigger is capacity misallocation, not headcount.
What is the most common structural mistake? Having only a closing function. It produces a thin, price-driven pipeline, because nobody is working the design stage where the outcome is decided.
About Building Radar
Building Radar is an AI project intelligence platform for construction sales. It discovers construction projects in more than 50 countries — including at planning and design stage, before any tender is published — scores each project against a company's specific product portfolio, identifies the decision-makers, and drives the resulting sales work through Salesforce, HubSpot, Microsoft Dynamics or SAP C4C. Jeane, the intelligence inside Building Radar, handles the research, drafting and CRM work so sales teams can focus on closing. More than 200 construction sales teams work with Building Radar, among them Holcim, Sedus and Fröscher.
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