Get matched with top window pros in Key Biscayne, FL

"We purchased impact windows and doors to replace our old windows and 2 french doors, from Locktight and we couldn't be happier with the entire process and products. The windows and doors are everything we hoped they would be. Communication with Locktight has been topnotch throughout; and, the removal of the old windows and installation of the new windows was quick, incredibly professional and impeccably neat. The windows themselves are beautiful, high quality and nearly soundproof. They have improved the appearance of the exterior of our house significantly. We highly recommend Locktight to anyone considering replacing/upgrading their windows and/or doors."

"Lewis and his team were responsive, timely and professional. Upon inspection of the windows, Lewis offered a wide range of films from which to choose and explained the benefits of each, so that I made the appropriate choice for my project. Seven windows were treated at my residence, including the removal of 30-year-old tinted film. I now have a lifetime warranty on the new Solar Control film. The job took just a bit under six hours and I was instructed on the care and maintenance of the film. All in all, a pleasant experience. Highly recommended."

"Absolutely thrilled with the window tinting service! The professional tinted 9 windows in my house flawlessly. The quality of work was exceptional, and the attention to detail was evident in every window. Not only does my house look fantastic, but the temperature inside is noticeably cooler. The entire process was smooth, from the initial consultation to the final inspection. Highly recommend this window tinter for anyone looking for top-notch service and results. Five stars!"

"Excellent job on my windows...they now sparkle!!!"

"Very professional, very polite, very reliable. They did everything they could to solve the issue with the window quickly and economically. I would hire again if needed."

"Excellent workmanship and products I have had three installations with Power in the past two years. I first used them for a new roof and gutters. The workers were all knowledgeable in their area of work. Clean up was good although some nails kept showing up over time. Next I had the 2nd floor windows and some 1st floor windows replaced, 9 in total. Installation went well and they cleaned up beautifully afterwards. I love the windows! They are a beautiful and energy efficient product. Lastly, I recently had a bay window replaced in my kitchen with the same type window. The workers ere all friendly and explained what would be done. The area was draped with plastic to cut down on dust. Clean up was excellent inside and outside! The window is beautiful and the framing on the outside of the window matches the other windows and the small roof above the bay window was replaced with the same roofing as the rest of the house. I would choose them again for any future projects."

"The windows and doors have transformed our home. The quality of the installation was excellent and their cleanup at the end of every individual unit installation was exceptional. I have and will continue to recommend ASP!"

"Guinn & Sons replaced all of our windows and doors with impact at my house. I am pretty picky so they took the time to explain the options and products to ensure I was happy. Very communicative from start to finish and we love how everything turned out. They kept everything clean during installation too. I’m a realtor in Miami and I refer all my clients to them, and everyone has been very happy! I highly recommend them."

"Jean did a great job measuring and installing new screens on my existing sliding doors and windows. Very professional and great service. Would recommend and hire him again for similar projects."

Tired of struggling with stuck doors and windows?\nAt Alonso Technical Services, we believe that a jammed sliding door or a broken window shouldn't be a source of daily stress or a security risk for your home. We specialize in restoring the movement and safety of your home’s essential fixtures, saving you from the massive expense of full replacements.\n\nAs proud recipients of the 2025 Super Service Award, our commitment to excellence is backed by hundreds of successful repairs and 5-star results across Miami Dade and Broward County. Whether it’s worn out rollers, damaged tracks, or windows that won’t budge, we bring the expertise and the parts to fix the issue on the spot often on the very same day.\n\nLet’s get your home gliding again. Contact Alonso Technical Services today for your free estimate and experience the peace of mind that comes with professional, award-winning care.\n\n