
Do Your Window sash repair Need Repair?
A window sash is the part of a window that holds the glass unit in place and can typically be found inside the window frame. It provides structure and support to the glass unit, ensuring it stays secure while allowing the window to open and close smoothly.
Common problems with window sashes include rotten wood, deformation, or difficulty opening and closing due to worn-out components. A damaged sash can compromise both insulation and window function. Replacing damaged parts is usually much more cost-effective than replacing the entire window. After a free initial inspection, we can typically determine whether repair or replacement is the best solution in your case.
If you are looking for the best window sash repair service near me — Rotten Window Repair Company is here for you!

The most common window sash breakages
1. Material Deterioration
- Wood rot: moisture damage, especially at sash corners and bottom rails
- Paint/finish failure: peeling, cracking, or UV damage affecting operation
- Vinyl/PVC warping: heat damage or poor quality materials
2. Operation Problems
- Sticking or binding: caused by paint buildup, swollen wood, or warped frames
- Hard to open/close: often due to dirt, debris, or lack of lubrication in tracks
- Sash won’t stay open: broken balances, worn springs, or damaged hardware
3. Structural Issues
- Loose or rattling sash: worn weatherstripping, loose hardware, or frame movement
- Sagging sash: failed balances, worn pivot points, or structural damage
- Cracked or broken glass: impact damage, thermal stress, or age-related failure
4. Hardware Failures
- Broken balances: worn spiral balances, broken springs
- Faulty locks/latches: worn mechanisms, misaligned hardware, or corrosion
- Damaged tracks: bent tracks, debris buildup, or worn guide channels
Rotten Window Repair Company conducts a free consultation: we’ll help you identify the problem with your window sash and then we’ll improve it with a high level of professionalism!

How to extend the life of window sash?
- Regularly clean windows of dirt and moisture. Treat them with special impregnations and liquids. Monitor the condition of mechanisms and the integrity of glass
- When planning to repair or replace any part of a window, check the validity of warranties; this may save you money and time.
- If you plan to repair the window yourself, make sure you have all the necessary tools and materials. If you are unsure, contact us for a free consultation. Seeking help in time can save you from more complex and costly breakdowns in the future
How do we repair window sash?
Assess the extent of the damage to determine whether repair or full replacement is needed
Carefully remove rotted or damaged wood from the sash
Repair or replace the affected wooden components using matching materials to maintain authenticity
Rebuild and reshape sections as necessary to restore structural integrity
Sand and finish the repaired areas to blend seamlessly with the original woodwork
Reinstall or adjust the sash to ensure smooth opening, closing, and locking operation
Improve energy efficiency by enhancing insulation and reducing air leakage
Preserve the original character and historical appearance of your windows
Extend the lifespan of your windows through professional restoration
Frequently Asked Questions
How do I know if my window sash needs repair or full replacement?
Can I repair a window sash myself, or should I hire a professional?
Simple repairs—like repainting, minor rot filling, or lubricating tracks—can be DIY projects. However, structural repairs, glass replacement, or sash balancing in double-hung windows often require specialized tools and experience. If you’re unsure, it’s best to consult a professional to avoid causing further damage.
How long does a typical sash repair take?
Simple repairs can often be completed in a few hours, while more complex restorations may take a day or two, depending on the extent of damage and type of window.
Are sash repairs worth it for older or historic homes?
Absolutely. Repairing original sashes in historic homes preserves architectural authenticity and can be more sustainable and cost-effective than replacement. Properly restored sashes can last for decades with regular maintenance.

Contact Rotten Window Repair
Don’t postpone window sash repairs for later: timely intervention can prevent more serious problems such as water infiltration into the room, increased heating costs, and even damage to wall and floor finishes. Contact us today to schedule a free consultation and inspection! +1 630-716-6181
You can see examples of our work in our gallery or on our social networks (Instagram, X and Facebook: @rottenwindow ).
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Testimonials
EXCELLENT Based on 36 reviews hua tian2024-12-12Trustindex verifies that the original source of the review is Google. This company is wonderful! Every one is very kind and professional! The technician showed up on time and told us the window is actually in good shape. The small repair can done by myself. He told us where I can buy the products and how to do it in a right way. They are so honest and didn’t charge me anything for the inspection and the valuable expertise! Thank again sir and happy holidays! Cornelius Jackson2024-12-05Trustindex verifies that the original source of the review is Google. Very professional! Technician was able to get straight to the point and repair window. Technician did not even charge as I didn’t require any material for the repair. I will definitely do business with this company in the future. LiveWell WithJoy2024-12-03Trustindex verifies that the original source of the review is Google. Rotten Window Repair is an amazing company. They did a great job of repairing a cracked window and saved me money. Another company I checked with before I found them wanted to replace the whole window, which would’ve cost more money. I highly recommend Rotten Window Repair for your new windows and repairs! Ricardo Bello Jr.2024-09-09Trustindex verifies that the original source of the review is Google. Tony and his crew are great! They are very flexible and accommodating with their schedule. Their work is top notch, they will go the extra mile to make sure you're happy with their work. They know their stuff and they maintain a clean work area. Highly recommend and will use again. Jim Litrenta2024-08-10Trustindex verifies that the original source of the review is Google. Very Professional, on time, and did fantastic work. Would highly recommend Becky Olsen2024-07-29Trustindex verifies that the original source of the review is Google. I had a cracked window and wanted the glass replaced. Rotten Window Repair was reasonably priced. I called three other places. One wanted three times the amount. The owner was professional, personable and was able to install with much care. I definitely recommend Rotten Window Repair! chris wu2024-06-24Trustindex verifies that the original source of the review is Google. Very nice person, do the best job, thank you very much 👍 James Rudnicki2023-11-20Trustindex verifies that the original source of the review is Google. Awesome job replacing my broken window pane! Great communication and they showed up on time! Thanks again:)