Timber sash windows can be difficult to maintain, but if they are regularly inspected and given appropriate maintenance they can continue providing efficient service for many years.
Most sash windows are equipped with counterweighting systems – these windows use cords that pass over pulleys and connect to weights concealed within their hollow frames – for easier operation and can easily be replaced in case they wear or become broken.
1. Check for Leaks
Sash windows may leak during periods of intense rainfall. To ensure their continued operation and reduce leaks, regular inspection is important; in most cases they can be fixed simply by greasing operating hardware.
Rot checks should also be conducted regularly as timber rot can compromise window integrity, leading to heat loss and water penetration. Any sign of rot must be addressed quickly as once established it may be difficult to eradicate.
Care should be taken when painting to avoid overspray onto glazing, and to protect historic ironmongery such as sash lifts and stays from paint stripping effects. Resin-based fillers offer an effective means of repairing rot while still preserving as much historic fabric as possible.
2. Clean the Glass
Timber windows can provide excellent insulating properties, but require regular maintenance to stay functional. Thankfully, sash windows can often be repaired without needing replacement altogether.
Rust and distortions on surface rusting may be corrected with metal cleaners, then rubbed down before priming with zinc phosphate-rich metal primer before repainting. Preparation for paint application is important; however stripping back to bare wood should be avoided in order to preserve surface profiles and timbers.
Repainting should also be performed regularly to protect the wood against weathering, while simultaneously making sure the windows and glazing remain watertight. This process should preferably occur during the summer months when windows are opened to allow drying before winter arrives.
3. Clean the Frame
Maintaining clean timber sash windows is one way to ensure they continue operating effectively and efficiently. Checking for signs of rot may help detect leakage or heat loss issues before they escalate further.
Original ironmongery such as sash lifts and cords should always be preserved and restored when possible. Although they can often be difficult to identify due to layers of paint covering them up, once cleaned they will reveal their fine craftsmanship and detail.
Sash and casement frames were typically constructed from slow grown deal (pine). Damaged sections should be repaired through cramping, gluing and pinning; where necessary a resin consolidant can be applied to strengthen weak areas prior to repainting.
4. Check the Hardware
Sash windows combine traditional craftsmanship and modern technology for stunning aesthetics and insulating properties, yet require regular maintenance for optimal function. They require routine servicing in order to remain in good condition.
Basic fittings to look out for when dating a property include lead (or cast-iron) weights, brass or hardwood pulleys and shutter hinges.
Sash windows should glide up and down with little force required, requiring minimal hardware lubrication to keep their sashes moving smoothly. Furthermore, it would be wise to keep an inventory of parts removed during dismantling or repair in order to more quickly locate any parts which need replacement; this is particularly important if any are missing altogether or have become detached.
5. Check the Weatherproofing
Sash windows make an elegant addition to any home and offer the ideal blend of traditional craftsmanship with modern technology. Their timeless beauty is enhanced by features such as sash horns, tilting upper and lower sashes and top-of-the-range operating hardware that will enhance their appearance in any setting.
Regular maintenance should also include repainting timber frames. To maximize effectiveness and speed up drying time, this activity should take place during summertime to protect timber against weathering and decay.
Glazing choices for your sash windows can also have a major effect on their price, as certain glass options can be more weighty and more expensive to produce than standard glazing (for example astragal bars cost more than Georgian bars). Ironmongery such as window locks, dual screws and anti-lift devices may also be added for increased security.
