Replacing old, worn out window sashes can greatly improve the look and function of your windows. Here is an in-depth guide to the window sash replacement process.
Reasons to Replace Window Sashes
There are several reasons you may need or want to replace the sashes in your windows:
- Rotting wood: Old wood window sashes can rot, warp, and develop cracks over time due to exposure to the elements. This can lead to air and water infiltration.
- Loose joints: The joints connecting the sash to the frame can come loose over years of use, causing the sash to sag, stick, and not open properly.
- Poor insulation: Old single pane sashes allow significant air transfer, leading to energy loss. Replacement with new double or triple pane sashes can boost insulation.
- Improved aesthetics: Replacing visibly worn and peeling sashes can instantly improve curb appeal and modernize the look of your home’s exterior.
- Lead paint: Old paint may contain lead, which can flake and pose health hazards. New sashes allow you to eliminate this.
- Security: Loose old sashes are more vulnerable to forced entry. Replacing them can improve security.
Window Sash Materials
Window sashes come in several material options, each with their own characteristics:
Wood
- Beautiful material that can be stained, painted, or left natural.
- Rot-resistant woods like mahogany and cedar hold up well.
- Must be properly sealed and maintained to prevent moisture damage.
Vinyl
- Affordable, low maintenance option.
- Resists rot, swelling, and warping.
- Comes in a wide range of styles and colors.
Aluminum
- Very durable and long-lasting.
- Resistant to rot, rust, and pests.
- Can conduct heat and cold if not properly insulated.
Composite
- Made from a mixture of materials like wood fibers, vinyl, and plastic.
- Offers durability without sacrificing aesthetics of real wood.
- More expensive than vinyl but requires less maintenance than real wood.
Fiberglass
- Strong, durable, and long-lasting.
- Won’t warp, crack, peel, swell, or rot.
- Offers good insulation properties.
- More expensive than vinyl and some composites.
Measuring and Ordering Replacement Sashes
Carefully measuring your existing sashes is key for ordering accurate replacements:
- Use a tape measure to measure width and height of sashes in inches.
- Note dimension of top, bottom, and side rails.
- Measure thickness of sashes in inches.
- Account for any irregularities like tilting mechanisms.
- Photograph sashes and surrounding frame area for reference.
Provide the manufacturer or supplier with your measurements and photos to get properly sized sash replacements. Lead times can range from two weeks to two months.
Installation Process
Installing replacement window sashes involves careful removal of the old and proper installation of the new. Basic process includes:
Prep work
- Clear area around windows and cover floors/furniture.
- Carefully remove window treatments like blinds and curtains.
- Wedge windows open to access sash components.
Removing old sashes
- Score paint between sash and frame with utility knife.
- Remove sash stops or weighting mechanisms.
- Detach sash cords if present.
- Slide out top and bottom sash one at a time.
Installing new sashes
- Check fit and make any adjustments for smooth sliding function.
- Apply sealant or weatherstripping around sashes.
- Re-install any sash weights or counterbalance hardware.
- Secure with sash stops and lock windows to allow sealant to dry.
Finishing touches
- Seal, caulk, and paint/stain as needed for desired finish.
- Re-hang window treatments and remove protective floor covering.
- Test windows to ensure proper operation.
Doing the installation yourself can save on labor costs but has risks. Consulting a professional window installer is recommended if you are uncomfortable doing full sash replacements yourself.
Costs
The costs of replacing window sashes includes:
- Sash material: vinyl ($100-300 per sash), wood ($300-800)
- Specialty sash features: triple pane, built-in blinds ($100+ extra per sash)
- Hardware: sash lifts, pulls, hinges ($20-50)
- Labor: $40-100 per hour if hiring a professional
Total costs for sash replacement in a standard double hung window can range from $250 – $1000+ depending on material and labor factors.
Maintenance Tips
To get the most out of your new sashes and keep them operating smoothly for years:
- Inspect sealant and caulk annually, re-applying as needed to prevent air and water infiltration.
- For wood sashes, re-coat painted surfaces and re-seal stain regularly to prevent damage.
- Keep sash channels and jambs clean and lubricated for easy operation.
- Do not apply tints, coatings or coverings to double/triple pane sashes which can cause heat damage.
- Ensure exterior weep holes are clear of obstructions and drainage is unimpeded.
FAQs
How do I know if my window sashes need to be replaced?
Signs your sashes need replacement include visibly rotted, cracked or warped rails and stiles, badly peeling paint, loose joints, significant air leakage, sagging sashes, and sashes getting stuck and not operating smoothly.
Can I replace just one sash instead of both?
It is recommended to replace both sashes together to ensure proper fit and operation. Replacing only one can lead to air leakage and operational issues if the new and old sash dimensions are slightly off.
What is the best material for replacement sashes?
This depends on your needs and preferences. Vinyl is affordable and low maintenance. Wood offers beauty but needs more upkeep. Composites and fiberglass provide a balance of aesthetics and low maintenance. Consider the architecture of your home, budget, and your goals.
Should I hire a window professional or DIY the installation?
The installation has risks that may make hiring a professional advisable, especially for full frame replacements. But for basic sash swaps, skilled DIYers can likely complete the project safely with proper care and guidance.
Can I improve energy efficiency when replacing sashes?
Yes, opting for double or triple pane glass in your new sashes can significantly boost the window’s insulation properties compared to old single pane sashes, reducing energy loss. Supplemental upgrades like weatherstripping also help.
How long will replacement sashes last?
With proper maintenance and barring any damage, vinyl and fiberglass sashes can last 30-50 years. Wood sashes with regular upkeep can last 30-60 years. Good quality composites last 25-30+ years.
Conclusion
Replacing worn out window sashes renews old drafty windows and can significantly improve the comfort and visual appeal of your home. With proper measurements, materials selection and installation, the project can give new life to your home’s facade and reduce energy bills. Conduct inspections and maintenance to ensure your new window sashes retain their like-new quality for years to come.