How to Prepare Your Single-Glazed Sash Windows for Winter

As temperatures start to drop, it’s a great time to ensure your single-glazed sash windows are ready to keep the warmth in and the cold out. These classic windows add charm to a home but often need a bit of preparation to provide effective insulation through winter. Here’s a simple guide to winter-proof your sash windows without compromising their beauty.

1. Check for Drafts and Gaps

Sash windows, particularly older ones, often develop gaps around the edges over time. Drafts can be a major source of heat loss, which leads to higher heating bills and a colder home. Here’s how to address this:

Inspect Seals: Run your hand along the window edges to feel for drafts, or use a smoke pencil to detect air movement.
Apply Weatherstripping: Self-adhesive weatherstripping is easy to install and a quick fix for most gaps. Apply it around the window frame where the sash meets the frame to create a snug seal.
Use Draft Stoppers: For extra insulation, you can use draft stoppers along the bottom of the sash. You can find a variety of styles to match your decor.

2. Repair or Replace Putty

Putty is used to secure and seal the glass panes in sash windows. Over time, it can dry out and crack, leading to drafts and rattling.

Inspect and Patch: Check for cracked or crumbling putty around each pane. Small cracks can be patched with new putty, but for larger repairs, it’s best to remove and replace it entirely.
Use High-Quality Putty: Make sure to use a glazing putty that’s durable and weather-resistant to maintain a good seal all winter long.

3. Consider Secondary Glazing or Film

If your sash windows are single-glazed, they’re not as energy-efficient as modern double glazing. To improve insulation, consider adding secondary glazing or a window insulation film.

Secondary Glazing: This involves installing a removable glass pane on the inside of the existing window. It’s more costly but highly effective for insulation and noise reduction.
Window Insulation Film: An affordable alternative, this clear plastic film can be applied over the window to trap an insulating layer of air. Kits are widely available and easy to install with a hairdryer to create a tight seal. They can then be removed when the weather improves.

4. Maintain Locks and Cords

Ensure your sash windows are secure and function smoothly, as this helps them close tightly and prevents drafts.

Check Locks and Latches: Make sure all locks are in good condition and properly align with the window frame.
Lubricate Cords and Pulleys: If your sash windows have cords and pulleys, keep them lubricated to maintain smooth operation. This allows you to close the window tightly and securely, improving the seal.

5. Use Heavy Curtains or Blinds

In addition to insulating your windows, thick curtains or thermal blinds add another layer of insulation to keep cold drafts at bay.

Thermal Curtains: These are designed to insulate windows and can make a significant difference on cold nights.
Close at Dusk: Make it a habit to close curtains as the sun sets, trapping the day’s warmth inside.

6. Keep Windows Clean and Free of Debris

Dirt, dust, and grime can prevent a tight seal when closing sash windows, so be sure to keep them clean.

Regular Cleaning: Use a damp cloth to wipe down the sashes and frame.
Remove Debris: Check for dirt or debris that may obstruct the window’s path and cause a gap.
Condensation: Wipe away any condensation as quickly as possible to prevent it from damaging your windows over time.

7. Consider Professional Help if Needed

If you’re unsure about DIY methods or your windows need significant repairs, consider consulting a professional. They can assess your windows and recommend effective repairs.

Final Thoughts

Preparing your single-glazed sash windows for winter doesn’t have to be a huge task. With a bit of time and attention to detail, you can improve their efficiency, reduce drafts, and keep your home cozy through the cold months.

If you would like to upgrade your timber sash windows to double-glazed because your existing windows just aren’t doing the job any more, or if they are beyond economical repair, Woodland of Kingston will be happy to help when it’s time to replace them.