A homeowner can choose a high-quality window, pay a fair price, and still end up with a poor result if the installation is done incorrectly. That is one of the biggest risks in the window replacement industry. The product matters, but the person installing it matters just as much.
David Mallette, Owner and CEO at The Window Source of Houston, believes contractors should prove that their installers can meet the company’s standards before they ever step inside a customer’s home. As a professional window replacement company in Houston, Texas, his company vets installers, looks at their past work, tests their skills, and teaches them the process the company expects them to follow.
That approach became a key part of Mallette’s PowerChat conversation with Greg Cummings, CEO of Power100. Their discussion looked at installer training, quality control, honest value, customer care, and what contractors must do to earn trust before a project begins.
Power100 is the only unbiased third-party platform that recognizes and elevates the top leaders and most impactful companies in the home improvement industry. Through conversations like this one, the platform gives leaders a place to explain the real systems behind strong customer experiences and better home improvement work.
For many homeowners, the hardest part of buying replacement windows is knowing whom to trust.
David Mallette, Owner and CEO at The Window Source of Houston
A company can show product samples. It can explain glass options, warranties, and energy savings. It can show photos of finished homes.
But one important question may still remain:
Who is actually going to install the windows?
For David Mallette, that question cannot be answered with a certificate alone.
During his PowerChat with Greg Cummings, Mallette explained that The Window Source of Houston does not simply accept an installer because that person says they have experience.
“We don’t just hire anybody off the street,” Mallette said.
His team wants to see proof.
Before an installer becomes part of the company’s work, Mallette said the team looks at projects that person has already completed and even visits work that is still underway. The goal is to see how the installer actually works before asking a homeowner to trust that person inside the home.
“We go out to some installations that they’ve done and they’re currently doing,” Mallette said. “We want to see what their current process is.”
The next step goes even further.
Mallette said installers come into the company’s warehouse, where they work with a mock window setup. Instead of only talking about their skills, they have to show them.
“Show me how to install this window. How would you do it? Here’s how we do it,” Mallette said.
That short exchange shows the difference between trusting experience and setting a company standard.
An installer may have worked in the industry for years. But Mallette still wants that person to understand how his company expects the work to be done.
The reason is simple.
Once an installer arrives at a homeowner’s property, that person represents the entire company.
The homeowner does not see the hiring process that happened weeks or months earlier. They do not see the warehouse training. They do not see the conversations about waterproofing, leveling, sealing, protecting furniture, controlling dust, or cleaning the work area.
They only see what happens in their home.
That makes the behind-the-scenes work important.
Mallette told Cummings that the company pays close attention to the entire installation process, from properly preparing and sealing the window to protecting the customer’s home during the work. He described details such as shimming, leveling, foam, sealants, waterproof barriers, drop cloths, furniture covers, and dust control.
Those details may not be the first thing a homeowner asks about when shopping for windows.
But they can be the difference between simply putting a product into an opening and completing an installation with care.
That is also why Mallette’s view of value goes beyond finding the lowest price.
During the interview, Cummings pointed out that homeowners may pay more when they choose a company that invests more in installation, product quality, warranty, and service.
Mallette’s process gives that idea a tangible form that homeowners can see.
The company not only says it cares about installation quality.
It tries to prove that quality before the job begins.
For homeowners looking for professional window and door replacement, it creates a better question to ask when comparing contractors.
Not only, “What window are you selling me?”
But also:
“What have you done to make sure the person installing it can meet your standard?”
For Mallette, the answer starts long before the installer reaches the driveway.
It starts with who the company is willing to trust with the customer’s home.
During his PowerChat conversation with Greg Cummings, David Mallette moved the discussion beyond what homeowners can see in a finished window project. He talked about the work that happens before the crew arrives, the standards installers must follow while inside the home, and the responsibilities that remain after the project is complete.
His point was clear. A company cannot promise quality and then leave quality up to chance.
The people have to be checked. The standard has to be taught. The small details have to matter. The homeowner has to understand the value. And when the job is finished, the company still has to stand behind what it installed.
That full process helps explain why Mallette places so much focus on the installer before the installer ever represents the company to a homeowner.
Greg Cummings, CEO of Power100
An installer may have years of experience. They may have worked for several companies. They may even arrive with the right certificates.
For Mallette, that still does not answer the most important question.
How does this person actually work?
That is why his team looks beyond what an installer says during the hiring process.
“We go out to some installations that they’ve done and they’re currently doing,” Mallette said. “We want to see what their current process is.”
That gives the company a chance to see habits that may never show up on a resume.
Those questions matter because the installer eventually becomes the face of the company inside the customer’s home.
For a trusted local window and door replacement company, that makes hiring part of customer protection. The homeowner may never see the vetting process, but the work done before the hire can shape everything they see later.
Mallette’s approach also sends a message to the installer.
Experience matters, but experience alone does not give someone a free pass.
The company still wants to see the work.
That creates a simple leadership lesson for contractors.
Do not wait for a problem in a customer’s home to learn whether someone meets your standard. Find out before you send them there.
Checking an installer’s past work is only the first step.
Mallette also wants installers to understand how his company expects the work to be done.
That is why the process moves into the warehouse.
He said the company has a mock setup in which an installer has to demonstrate how they would complete the work.
“Show me how to install this window,” Mallette said. “How would you do it? Here’s how we do it.”
That last sentence carries a larger lesson.
Here’s how we do it.
A company cannot expect the same result from every crew if every person follows a different process.
One installer may have learned one method.
Another installer may have learned something different.
Without a clear company standard, quality can change from job to job.
Mallette’s hands-on approach creates a shared starting point.
The installer can show what they already know. The company can then show the process it expects to follow. That gives both sides a clear understanding before the installer works on a customer project.
For a professional window replacement company, this kind of repeatable training can become even more important as the business grows. More jobs should not mean more versions of what a good installation looks like.
The standard should stay clear.
That does not remove the installer’s skill.
It gives that skill a system to work inside.
And when the company teaches that system before the first customer job, accountability becomes easier because the installer already knows what good work is supposed to look like.
Once Mallette began explaining the installation process, the conversation turned to details that many homeowners may never notice after the project is complete.
He talked about correctly shimming the window.
He talked about getting it level.
He talked about foam, sealants, and creating a waterproof barrier.
He also talked about what happens around the window while the crew works.
The team uses drop cloths.
Furniture can be covered with plastic.
Zip walls can help control dust.
The crew also cleans up the work area.
Those steps may not sound as exciting as choosing a new window style or seeing the finished project.
But they show where much of the real care happens.
A homeowner should not have to become a window expert to receive a good installation.
That is the contractor’s job.
The customer should be able to trust that the steps they cannot see receive just as much attention as the finished parts they can see.
That becomes especially important when homeowners invest in energy-efficient replacement windows. A product may offer strong energy features, but the installation still has to support how the product is meant to perform.
Mallette’s focus on these small details also changes the way value should be measured.
The value is not only in the window.
It is also in the preparation, the protection of the home, the materials used around the opening, and the care taken from the first step to the last.
That is where a company turns a product into a full installation experience.
Price matters to homeowners.
Greg Cummings did not avoid that fact during the conversation.
He pointed out that The Window Source of Houston may not be the cheapest company on the list, but it may not walk into every home.
The larger question is what the homeowner receives for the money.
Cummings framed that value around better installation, more integrity, stronger products, warranty support, and service after the project.
That creates an important difference between price and value.
Price tells the homeowner what the project costs today.
Value asks what they are receiving for that cost and whether the work will still feel like a good decision later.
A strong window installed poorly can still result in a poor outcome.
That is why Mallette’s focus on vetting, training, materials, and process matters.
Those steps help support the product the homeowner already paid for.
This becomes even more important with projects involving hurricane and impact-resistant replacement windows. Homeowners choosing products for greater storm protection need to know that the company takes the installation just as seriously as the product itself.
That does not mean homeowners should simply choose the highest quote.
It means they should understand what sits behind each quote.
When contractors explain those answers clearly, homeowners can compare more than numbers.
They can compare what each company is actually promising to deliver.
A strong installation process should not end when the final tool is returned to the truck.
Mallette said his team conducts a walkthrough after installation to ensure the project looks right.
The company also follows up with customers and remains available if something needs attention.
“We do a walkthrough, make sure everything’s perfect,” Mallette said.
He also made another promise clear.
“If there’s ever anything, just call us and we’ll come out.”
That matters because every contractor can talk about quality before receiving the sale.
The stronger test comes after the work is done.
Earlier in the conversation, Mallette also mentioned offering a lifetime labor warranty for the products his company installs.
A warranty can offer peace of mind, but the larger value comes from the company remaining present enough to stand behind it.
That completes the story Mallette began with installer vetting.
First, the company checks who it allows onto the team.
Then it shows installers the standard.
The crew follows the process inside the home.
The company checks the finished work.
And if the homeowner needs help later, the relationship does not simply disappear.
For a window and door replacement company, that full chain of responsibility can be one of the strongest ways to build lasting trust.
The work may begin with choosing the right installer.
But real accountability continues long after installation day.
David Mallette’s focus on installer quality does not exist only inside The Window Source of Houston. In 2026, the company received a group of outside honors that point to its growing place in both the Houston market and the wider remodeling industry.
One of the clearest signs came from Qualified Remodeler’s Top 500, where The Window Source of Houston ranked No. 429 nationally in 2026. The national listing reported $4.75 million in 2025 remodeling revenue, 325 completed jobs, and a focus on replacement home improvement work.
That national recognition arrived alongside several local and statewide honors.
The company displays a Houston Chronicle Best of the Best 2026 winner recognition for windows and doors, as well as a 2026 BBB Awards for Excellence Pinnacle Winner honor on its website. Its current awards page also lists its 2026 Best of Texas Award and its inclusion among Expertise.com’s Best Window Contractors serving League City.
The awards come from different places and measure different things, so they should not all be treated as the same kind of honor. Taken together, however, they show that the work behind the company is being noticed across industry, business, consumer, and local market channels.
That matters in the context of Mallette’s PowerChat message.
He spent much of the conversation talking about the work homeowners may never see before installation day. The installer checks. The hands on testing. The standards. The care taken inside the home.
Recognition does not create those standards.
But it can become outside evidence that the systems behind the work are producing a company people continue to notice.
Mallette’s impact has also moved beyond awards and into homeowner education.
In March 2025, he appeared on Houston Life on KPRC 2 in a sponsored segment about replacing windows and what homeowners should know before starting a project. The station identified The Window Source of Houston as a veteran and family owned business and featured Mallette discussing the window replacement process with Houston homeowners.
That public education has continued.
In a 2026 Houston Life sponsored segment, Mallette discussed energy bills, Houston heat, modern vinyl windows, installation timing, and the importance of protecting floors and furniture while using strong sealants during installation. He told viewers that his team takes pride in the installation process, tying the public message back to the same standards he described during his PowerChat.
That consistency is important.
It is one thing for a company to say quality matters in an interview.
It is another to build the same message into the way the company trains installers, speaks to homeowners, and presents its work in the wider Houston community.
The Window Source of Houston’s recent recognition includes:
Qualified Remodeler Top 500 2026, No. 429 nationally
Houston Chronicle Best of the Best 2026
Guide to Texas 2026 Best of Texas Award
BBB Awards for Excellence 2026 Pinnacle Winner
Expertise.com Best Window Contractors serving League City for 2026
Alongside those honors, Mallette’s Houston Life appearances have given him another way to help homeowners understand what they should expect from a window contractor before, during, and after installation.
For Mallette, that creates a strong link between reputation and process.
The recognition may happen after the work.
But the work that earns trust still begins much earlier.
A homeowner sees the finished window.
What they may not see is everything that had to happen before that moment.
For David Mallette, Owner and CEO at The Window Source of Houston, quality starts well before an installer arrives at the home. It starts with the choices a company makes behind the scenes.
Who gets hired?
What standard are they expected to meet?
How clearly that standard is taught.
And whether the company is willing to stand behind the work once the project is complete.
That is why Mallette’s statement, “We don’t just hire anybody off the street,” means more than a hiring rule.
It is a promise about responsibility.
A contractor asks a homeowner for trust long before the first window comes out of the wall. That trust begins with the people the company chooses to send into homes and with the systems leaders put in place to help those people succeed.
For contractors, the lesson reaches beyond window installation.
Growth can create pressure to move faster, complete more jobs, and add more people. But speed should never make the standard easier to meet.
The better path is to build a process strong enough to grow with the company.
For homeowners, the lesson is just as important.
The right questions are not only about the product, the price, or how quickly the project can begin. They are also about the people doing the work and the standards behind them.
As Mallette’s conversation with Greg Cummings showed, trust is not something a company earns with one sales promise.
It is built on the decisions made before the homeowner ever opens the door.
And when those decisions are made with care, the finished window becomes more than the end of a project.
It becomes proof that the process behind it worked.
Power100 does not let a single score determine the final result. Its current five-layer process starts with public signals, revenue indicators, and other verifiable business data. Its system then uses AI scoring before industry professionals review the results. Power100 also cross-checks customer, partner, and employee feedback before finalizing the ranking. This process gives the platform several chances to question a score before a CEO reaches the Top 100.
Power100 uses technology to analyze large volumes of business information, but it does not allow it to make the final decision alone. Its ranking system adds human review from people with industry experience, then cross-checks outside feedback before the final ranking. Power100 says this combination helps it measure real business performance while also considering leadership, culture, customer experience, community impact, and other factors that numbers alone may not fully capture.
David Mallette does not believe experience alone proves that an installer meets his company’s standards.
Before trusting someone with a homeowner’s project, his team looks at work the installer has already completed and may visit a project that the installer currently has underway.
“We go out to some installations that they’ve done and they’re currently doing,” Mallette said. “We want to see what their current process is.”
This gives the company a chance to study how the installer actually works rather than relying solely on a certificate, resume, or conversation. Mallette wants proof before the installer represents the company inside a customer’s home.
Mallette said his company brings installers into its warehouse and uses a mock window setup to test their work.
“Show me how to install this window. How would you do it? Here’s how we do it,” Mallette said.
The process allows the installer to demonstrate their current skills while also giving the company a chance to teach its own standard. Instead of assuming every experienced installer follows the same process, Mallette makes the expected method clear before that person works on a customer’s project.
For homeowners comparing window contractors in Houston, this raises an important question to ask before signing a contract: How does the company check and train the people who will actually perform the installation?
Mallette describes quality as more than placing a new window into an opening.
During the PowerChat, he discussed steps such as properly shimming and leveling the window, using foam, applying sealants, and creating a waterproof barrier. He also explained that his crews use drop cloths, cover furniture, use barriers to control dust, and clean the work area.
Those details matter because the homeowner pays for more than the window itself. The homeowner also trusts the contractor to protect the home and install the product in a way that supports its performance.
The company’s website also states that it does not consider the project complete until its team has properly installed the windows and doors in the home.
A low price does not explain who will perform the work, how the company trains that person, what installation process they will follow, or what support the homeowner will receive later.
During the interview, Greg Cummings raised that exact point. He noted that greater value may come through installation quality, integrity, better products, warranty protection, and service after the project.
The Window Source of Houston also states that it offers energy-efficient products, professional installation, and a limited lifetime warranty on qualifying windows and doors.
A homeowner should compare what lies behind each price rather than the final number alone.
The Window Source of Houston says Houston’s heat, humidity, and storm exposure should influence the type of window a homeowner selects.
Its Houston service page recommends double-pane windows with Low-E glass for the area’s hot, humid climate because these features can reduce heat transfer and enhance indoor comfort. The company also recommends impact-rated options for homes in areas with greater hurricane exposure.
The company separately offers hurricane and impact windows built with reinforced frames and laminated glass for greater resistance to high winds and flying debris.
That makes hurricane- and impact-resistant replacement windows in Houston and energy-efficient replacement windows for Houston homeowners two different needs that homeowners should discuss based on the home’s location and goals.
No. Homeowners should read the actual warranty rather than assuming that the word “lifetime” means every possible problem is covered.
The Window Source of Houston states that its limited lifetime warranty covers qualifying product defects, workmanship, mechanical parts, seal failure, certain glass issues, and labor, subject to the terms listed on its warranty page. It also provides transferability to the next homeowner in qualifying cases.
The warranty also lists exclusions. It does not cover damage caused by events such as intentional breakage, vandalism, modifications, fire, floods, hurricanes, tornadoes, and other listed events. The warranty applies only to windows and doors installed by The Window Source of Houston.
That is why homeowners should review the exact warranty terms before choosing a contractor and ask what the company will cover if a problem develops after installation.
Power100 is the only unbiased third-party platform that recognizes and elevates the top leaders and most impactful companies in the home improvement industry. Led by Greg Cummings, CEO of Power100, the platform shares leadership lessons, business practices, and industry insights to help contractors build stronger companies and better serve homeowners. Through PowerChats, national rankings, executive stories, and conversations with leaders such as David Mallette, Owner and CEO at The Window Source of Houston, Power100 gives the industry a closer look at the standards, systems, and leadership choices behind companies working to raise the level of trust and service in home improvement.
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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.
