Business Details
Your Trusted Partner for Home Remodeling Solutions
Allstate Siding & Windows has been a trusted name in home improvement for over 50 years, proudly serving Houston, Sugar Land, Galveston, Katy, and The Woodlands, TX. As the oldest family-owned and -operated siding and window company in Texas, we specialize in energy-efficient windows, durable siding replacements, and premium patio doors installed to code by certified professionals. Our commitment to quality is reflected in our TDI windstorm-rated products, 30% fade-resistant ColorPlus Technology finishes, and 50-year warranties on LP SmartSide siding.We prioritize customer satisfaction through personalized service, offering free project quotes and discounts for veterans, first responders, and senior citizens. With a legacy built on referrals and lasting relationships, our team combines decades of expertise with cutting-edge materials to enhance home aesthetics and resilience against Texas harsh climate.
Services
Siding Replacement
Window Replacement
Impact Windows
Patio Doors
Vinyl Siding
HardiePlank Siding
LP SmartSide Siding
Aluminum Sliding Doors
Composite Doors
Energy-Efficient Upgrades
Highlights and features
- We have over 50 years of experience in Texas home improvement.
- Our team offers TDI windstorm-rated products for durability.
- We provide 50-year warranties on LP SmartSide siding installations.
- Free project quotes available for all replacement needs.
- Discounts offered for veterans, first responders, and seniors.
Associations and certifications
- Texas Department of Insurance (TDI)
What people say
Excellent craftsmanship
Professional installers
Durable products
Great customer service
Increased home value
Services
Siding Replacement
We install durable LP SmartSide and James HardiePlank siding engineered to withstand Texas heat, moisture, and wind. Our siding resists termites, mold, and fading while offering 50-year warranties. Certified technicians ensure code-compliant installations that enhance energy efficiency and home value across Houston and surrounding areas.
Window Replacement
Our NT Twinsulator and impact-resistant windows improve thermal performance with Low-E glass and argon insulation. Available in vinyl and aluminum options, these windows reduce energy costs while meeting Texas windstorm requirements. Free consultations help homeowners select styles matching their aesthetic and budget needs.
Patio Doors
Neuma and Don Young aluminum sliding doors combine durability with modern design. Features include multipoint locking systems, thermal breaks, and weather guards to prevent water infiltration. Customizable finishes and energy-efficient options ensure seamless integration with Texas homes architectural styles.
People
James C. LaGrappe, Sr.
Founder
Founded the company in the 1970s by door-to-door sales, establishing a legacy of customer-focused service and quality installations.
Jimmy LaGrappe, Jr.
Co-Owner
Continues family tradition with hands-on leadership, ensuring adherence to high standards in product selection and installation practices.
Mary LaGrappe
Co-Owner
Integral to daily operations, maintaining the companys commitment to personalized service and community engagement since its founding.
Questions
What areas do you serve?
We serve Houston, Sugar Land, Galveston, Katy, The Woodlands, TX, and surrounding regions for all home improvement projects.
Do you offer financing options?
Yes! We provide 12 months of no payments or interest financing for qualified customers on approved credit.
What warranties do your products carry?
LP SmartSide siding includes a 50-year warranty, while HardiePlank offers a 30-year limited warranty with 15-year paint protection.
Are your installers certified?
All installations meet TDI windstorm certification standards, performed by factory-trained, experienced professionals.
Do you offer free estimates?
Yes, we provide free project quotes for all siding, window, and door replacement services.
Reviews (4)
James Cook
May 15, 2022
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A friend recommended All-State windows after they replaced all of her windows due to their high quality of work and great price. I have been having issues with controlling humidity in my home. When Patrick came out, it was evident that he was trying figure out how his services could solve our problem. He wasn't just here to make a sale, and it showed. I was very impressed.
Patricia Farrell
Feb 24, 2022
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I really love my new windows and everyone from sales (Patrick) to Mike and Dexter have been very pleasant and easy to work with. Their price is very reasonable and the installers were fantastic. It was a pleasure to work with everyone at Allstate Windows and Siding. Service: Window installation
Lisa Df
Feb 17, 2022
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Excellent company! They gave me a detailed estimate. Workmanship and clean up was everything and more. I'd use them again. They were better than I could have imagined. My home is warmer in winter and cooler in the summer. Great job from start to finish. Service: Window installation
Judy Tanamachi
Feb 17, 2022
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Improperly installed gable vents. After numerous calls owner Jimmy lagrappe came to see work (done 2/2021). Said allstate was at fault & they would make it right. That was 6 months ago. At first I got the run around. Now allstate just ignores me completely. Their poor quality of work & refusal to correct had caused mold in my attic (no air flow) as well as much higher electric bills. Never, ever use them or pay up front. I paid almost $20,000.00 cash. I have HUGH regrets!
