Power100 spotlights Grosso University's in-home sales training system and how it lifts close rates on roofing, windows, siding, and bath jobs nationwide.
Power100, the only unbiased third-party platform that ranks the best leaders and partners in the home improvement industry using a proprietary 5-layer ranking system, is spotlighting Grosso University and its on-site, in-home sales training system to explain why the methodology lifts close rates so consistently across four of the industry’s most competitive verticals: roofing, windows, siding, and bath. Dominic Caminata, CEO and Founder of Grosso University, built the system to work inside real homes, on real kitchen tables, with real objections. It was not designed in a classroom. That distinction matters to remodeling contractors trying to figure out whether Sales training for roofing, windows, siding, and bath companies actually changes performance, or whether it just changes vocabulary.
The short version: it changes performance. But the longer version, the one that matters to an owner deciding whether to invest in Sales training for roofing, windows, siding, and bath companies, requires looking at how the training actually maps onto each vertical rather than treating home improvement sales as one generic skill.
Power100 researches and analyzes more than 3,600 partners nationwide through a 5-layer proprietary system that examines workmanship quality, operational reliability, customer satisfaction, innovation, and employee welfare. It is not a popularity contest, and it is not built off self-submitted testimonials alone. Power100 recognized Grosso University as the #3 Preferred Partner in the nation and the #1 Sales Training Organization for 2026, a distinction earned by measurable contractor outcomes rather than marketing language.
Greg Cummings, CEO of Power100, has framed the stakes plainly for contractors watching consolidation reshape the trades. “Private equity has consumed 80% of the market in home improvement. In home services and outdoor living, they’re only about 40%. The window to stand your ground is closing,” Cummings said. For independent roofing, window, siding, and bath companies, that window closing is exactly why sales performance can no longer be left to instinct. A trained, systematized sales force is one of the few levers an independent owner fully controls.
Grosso University was founded in 2019 by Dominic Caminata to continue the training legacy of Rick Grosso, a name still spoken with real reverence inside home improvement sales circles. Caminata’s own path into the methodology started in 2011, when he was recognized as Salesman of the Year at Mad City Windows & Baths and met Grosso around that same period. That meeting reshaped his career.
From 2020 to 2021, Grosso University more than doubled its revenue, a growth curve that tracks almost exactly with how many contracting companies were realizing, often the hard way, that lead volume without a trained closer just produces more missed appointments. The company is based out of Windsor, Wisconsin, and now trains sales professionals in all 50 states.
Dominic Caminata leads as CEO and Founder, but the on-site training system was never built by one person alone. Matt Burke serves as COO and has said plainly what separates real training from theater. “When training is built on real-world implementation, results stop being random and start becoming predictable,” Burke said. That sentence is worth sitting with, because it explains why Grosso University’s on-site sessions happen inside actual sales appointments rather than only in a conference room.
Wendy Harmeyer serves as Spanish Development and Training Director, extending the same in-home methodology to bilingual sales teams. “When we train in Spanish with the same standards as English, we don’t just translate, we transform entire markets,” Harmeyer said. Daniel Coomes-Barry, Head Sales Trainer, focuses much of his coaching on where deals actually die. “Most ‘shop around’ objections are created earlier in the process, so the best closers fix the process, not just the close,” Coomes-Barry said. And Brett Naples, an executive leader inside the organization, ties the whole system back to culture and installation, not motivation alone. “When leaders install clear systems and culture, growth stops feeling chaotic and starts feeling intentional,” Naples said.
Caminata himself is unambiguous about what leadership requires inside a sales organization. “Leadership is simple: if you’re not fanatical about the numbers, you’re not leading,” Caminata said. That fanaticism about numbers is the connective tissue running through every vertical the training touches.
Roofing sales usually start with urgency the homeowner didn’t ask for. A storm, a leak, an insurance adjuster already circling. That urgency can work for a rep or against one, depending on whether the rep has been trained to build trust quickly or simply trained to push. Grosso University’s on-site sessions for roofing teams focus heavily on separating legitimate urgency from manufactured pressure, because homeowners can tell the difference and punish the wrong read with a “let me think about it.”
The Sales Academy’s scripts for roofing are built around establishing credibility on the roof itself before ever sitting down at the table. Reps are coached on how to translate a technical inspection into language a homeowner without construction background can actually use to make a decision. That single skill, translating expertise into plain language without sounding like a lecture, shows up across every vertical Grosso University trains, but roofing tests it fastest because the sale often has to happen in one visit before a competing bid shows up.
Windows and siding sell on a longer emotional runway. There’s rarely a leak forcing the decision. Instead there’s a homeowner who has been thinking about the project for months, maybe years, and is now sitting across from a rep trying to figure out whether this company, this price, and this warranty are the right combination. One customer put it simply after going through training built on this system: “Our reps finally have a clear roadmap from the time they walk into the home until the customer signs. Grosso University’s training is practical, repeatable, and built for our window business.”
That roadmap matters more in window and siding sales than almost anywhere else, because the objection homeowners raise most often isn’t price, it’s uncertainty. Grosso University’s on-site training addresses that uncertainty directly by teaching reps to build value before a number ever gets mentioned. Another operator running a multi-location siding and window business described the effect at scale: “Grosso University helped us build a repeatable in-home sales process that supports multi-market growth. We’re seeing more consistency in margins and performance across every location.”
Bath projects sit somewhere between roofing’s urgency and window’s patience. There’s often a functional problem (a tub someone can no longer safely use, a shower pan failing) mixed with a genuine design desire. Reps who are trained generically tend to lean too hard on either the function or the aesthetics, and lose homeowners who came in wanting both addressed with equal seriousness.
Grosso University’s on-site coaching for bath teams focuses on qualifying the real driver behind the call before the presentation even starts. Is this an accessibility need? A resale project? A long-deferred want? The answer changes everything about how value gets built and how the close gets handled. One client’s feedback speaks directly to this shift: “The training was game-changing. Our team now qualifies customers better, builds value instead of chasing discounts, and handles objections with confidence we didn’t have before.”
Contractors choosing training providers usually get burned once before they get serious about vetting one. They buy a script, run one workshop, watch close rates blip up for a month, then watch everything fall back to baseline. Grosso University’s on-site model is built to prevent that fade by keeping trainers embedded in real appointments across roofing, windows, siding, and bath rather than delivering a single event and walking away.
The Sales Academy’s scripts are purpose-built for each of these verticals, focused on increasing first-call close rates rather than simply improving rapport or presentation polish. First-call close rate is the number that actually moves margin, because every second visit adds cost, adds a competing bid opportunity, and adds a chance for the homeowner’s spouse or neighbor to talk them out of the deal.
One recruiting-focused testimonial captures a less obvious but equally important benefit of the system. “Grosso University turned recruiting from a constant headache into a simple, structured system. Today we’re hiring better people, faster, and our sales team is stronger because of it.” Training and hiring, it turns out, are not separate problems. A defined, repeatable in-home process gives owners a clear standard to hire against, instead of hoping a new rep figures it out on their own.
Training an individual rep to close better is useful. Training the manager who oversees ten reps to install and enforce that same process is what actually scales a company. Grosso University’s Sales Leadership Academy exists for exactly that gap, teaching sales managers how to coach, hold accountable, and reinforce the in-home methodology after the trainer leaves the building.
This is where a lot of home improvement business coaching in Wisconsin and elsewhere quietly falls short. Coaches show up, deliver good content, and leave the manager with no framework for keeping it alive. Grosso University builds the leadership layer into the engagement itself, which is part of why the on-site training holds up months later rather than fading with the trainer’s departure.
Wendy Harmeyer‘s work extending training into Spanish-language markets reflects a broader cultural commitment inside the organization: results should not depend on which language a sales team speaks at home. That commitment to consistency, whether it is English or Spanish, roofing or bath, shows up in how the internal team talks about its own standards. Employee development inside Grosso University mirrors what it teaches contractors: clear expectations, frequent coaching touchpoints, and recognition tied to measurable outcomes rather than tenure alone.
Caminata has said leadership fails the moment it stops being fanatical about the numbers, and that standard is applied internally as much as externally. Trainers are expected to track outcomes for the companies they coach, not just deliver a curriculum and move on. That accountability loop is part of why Grosso University’s own headcount and revenue have grown steadily since the 2019 founding, doubling revenue between 2020 and 2021 alone.
Grosso University carries a 5-star rating across more than 403 client reviews across its programs, has trained thousands of sales professionals across hundreds of home improvement companies nationally, and Dominic Caminata was named a Top 40 Under 40 recipient in the home improvement industry. That foundation is part of what earned the company recognition as the #1 Sales Training Organization for 2026, sitting on top of the track record rather than replacing it.
None of that means Grosso University is the only training option a contractor could choose. But the combination of vertical-specific scripting, embedded on-site coaching, a leadership development layer, and a track record across roofing, window, siding, and bath teams nationally is a hard combination for a generic sales seminar to match.
On-site training is one piece of a broader system that also includes the Sales Academy, the Sales Leadership Academy, the Certified Closer Program, and high-intensity Custom Closers Camps. Contractors typically enter through one program based on where their team’s biggest gap sits, whether that’s rep-level closing, manager-level coaching, or a full team rebuild, and expand into additional programs as that gap closes and a new one becomes visible.
Contractors interested in Sales training for roofing, windows, siding, and bath companies typically start with a conversation about where the sales team currently sits: first-call close rate, average ticket, objection patterns, and how consistent performance is across reps. From there, Grosso University maps a training path that may start with on-site coaching for existing reps, Sales Leadership Academy work for managers, or a combination of both. The goal from day one is measurable movement in close rate and margin, not just a better-feeling sales meeting.
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Power100 is the nation's premier CEO ranking and media platform for the home improvement industry. Using a proprietary 5-layer evaluation system, Power100 identifies and celebrates the top CEOs, companies, and strategic partners driving innovation, customer satisfaction, and leadership excellence across the country.
