“My husband and I are obsessed with our new windows from The Window Source!! They were delivered in a very short time frame and only took a day to install. Great install crew, very clean, efficient, and paid attention to detail when sealing everything off.”
Lifetime Warranty
The Leak Shield Guarantee
A lifetime, transferable promise on every installation
At The Window Source of Houston, we know a window or door is only as good as its installation. Houston’s heat, humidity, and heavy seasonal rains put every seal and flashing detail to the test. That’s why every installation we perform is backed by our Leak Shield Guarantee.
What It Covers
If your window or door ever develops a water leak caused by our installation workmanship, we repair it at no cost, for life. It never expires as long as the original installation remains in place.
Transferable
Sell your home? Coverage transfers to the new owner at no charge. That adds real value at resale, with no paperwork required.
Our 3-step process
- 1
Free In-Home Consultation
We evaluate your windows and doors and recommend the right products for Houston’s climate.
- 2
Precision Measurement
Exact measurements are taken to ensure a proper fit before your order is placed.
- 3
Certified Installation
Every seal point is sealed to a rigorous weatherproofing standard, then inspected and tested.
Why it matters: improper flashing, sealing, or fitting is one of the leading causes of window and door failure. It leads to water damage, mold, and higher energy bills. The Leak Shield Guarantee is our commitment that if our installation is ever the cause of a leak, we make it right for as long as you or the next owner live there.
What Is Leak Shield?
The Leak Shield installation method was developed for Houston’s extreme heat, humidity, and heavy seasonal rainfall. It’s a climate where wind-driven storms and year-round moisture place constant pressure on every window and door opening.
Rather than relying on surface caulking alone, Leak Shield is built around a controlled, multi-layered moisture management system at every critical point of the opening. Our installers use the OSI Window & Door System to build this barrier from the inside out, so water is stopped and directed away before it ever reaches the framing of your home.
What goes into every installation
- 1
OSI Window & Door Flashing System
An engineered flashing membrane that seals the rough opening before the window or door is ever set, giving water a controlled path out instead of a way in.
- 2
Butyl Flashing Tape
A self-adhering, waterproof layer applied at every seam and flange. It’s the first line of defense against wind-driven rain.
- 3
Low-Expansion Foam
Fills the gap between frame and structure to seal out air and moisture without expanding enough to bow the frame out of square.
- 4
Professional-Grade Caulking
The final exterior seal, applied to hold up against Houston’s sun, humidity, and heavy rain year-round.
We integrate Leak Shield into every installation we perform at no additional cost, backed by our lifetime, transferable Leak Shield Guarantee.
Comfort, Efficiency & Security
Leak Shield is built for protection, but its benefits reach well beyond moisture management. A properly sealed opening supports long-term comfort, efficiency, and peace of mind.
Superior Weather Protection
Leak Shield reinforces the top, bottom, and perimeter of every window and door opening, helping guard against leaks and moisture-related issues like wood rot and interior damage.
Improved Energy Efficiency
By creating a tighter seal between the frame and the surrounding wall, Leak Shield helps cut down on drafts and uncontrolled air movement, so your home holds its temperature better and your system works less.
Stress-Free Maintenance
Water intrusion often leads to costly, disruptive repairs. Reinforcing the critical seal points of every opening reduces the likelihood of premature maintenance issues, for greater long-term reliability.
Reduced Outside Noise
Air gaps around a poorly sealed window let exterior noise into the home. A reinforced perimeter seal closes those gaps, helping create a quieter indoor environment.
Added Security
A window or door properly integrated into its opening supports the performance of built-in locking hardware and reinforced components, beyond moisture management alone.
Protected by the Leak Shield Guarantee
Because Leak Shield is installed as a consistent, repeatable system, every installation we perform is backed by our lifetime, transferable installation guarantee. If a concern ever comes up, our team will inspect the issue and make it right.
This is separate from the manufacturer’s warranty, which covers defects in the window or door’s own materials and components. Together, the two protections mean both the product and the workmanship behind it are covered.
Our Leak Shield Guarantee
Covers the installation itself: the seal, the flashing, and the fit. It lasts for as long as you or a future owner live in the home.
Manufacturer’s Warranty
Covers defects in the window or door itself, such as glass, hardware, and frame materials, per the manufacturer’s own terms.
The Window Source of Houston and The Good Contractors List
At The Window Source of Houston, we understand the importance of trust and assurance when it comes to choosing a window and door contractor. That’s why we’re proud to partner with The Good Contractors List, offering you a guarantee of quality and satisfaction for every project we undertake.
When you choose The Window Source of Houston and The Good Contractors List, you’re choosing a partnership built on trust, quality, and integrity. Our guarantee is our commitment to your satisfaction and peace of mind.
What does our guarantee include?
$25,000 Protection
Through our partnership with The Good Contractors List, your investment is protected up to $25,000, ensuring that you receive the quality workmanship and service you deserve.
Quality Assurance
We stand behind our workmanship and materials. Our guarantee ensures that if any issues arise due to workmanship or material defects, we’ll address them promptly and efficiently.
Customer Satisfaction
Your satisfaction is our priority. We’re committed to delivering exceptional results and ensuring that you’re fully satisfied with the outcome of your window and door project.
What Houston homeowners say
5.0
425+ Google reviews
“I got several quotes, and Jairo was the only one who brought samples and took the time to give us a demonstration. The office stayed in communication with me every step of the way… Edwin’s installation team worked quickly and professionally.”
“Replacing my parents’ original builder-grade windows in their 25+ year old home was one of the best investments they’ve made… They’ve already noticed lower electric bills, less outside noise, and a cooler, more comfortable home that’s much easier to keep at a consistent temperature.”
See How Leak Shield Will Protect Your Home
Every home is different. Exposure, siding, framing, and existing installation details all affect how your windows and doors should be replaced. During your free in-home consultation, we’ll evaluate your current windows and doors, inspect the surrounding openings, and walk you through exactly how Leak Shield would be applied to your home. You’ll get clear recommendations and a detailed estimate, with no pressure and no obligation.
Call (281) 547-6900 for your free consultation