Sash Window Bottom Rail

Sash Window Bottom RailThe sash window bottom rail forms the lower edge of the bottom sash, providing structural integrity and a clean profile finish. Precision machined to match traditional period detailing, this 1. 2m length suits repair and restoration work on original timber sash windows in heritage and listed properties. Specifications Property Detail Material Timber Length 1. 2m (1200mm 4ft) Profile Traditional sash window bottom rail profile Finish Machined, ready to

The sash window bottom rail forms the lower edge of the bottom sash, providing structural integrity and a clean profile finish. Precision-machined to match traditional period detailing, this 1.2m length suits repair and restoration work on original timber sash windows in heritage and listed properties.

Specifications

What it's used for

• Replacing a damaged or rotten bottom rail on an existing lower sash frame
• Restoration of period and listed building timber sash windows to maintain original profiles
• New sash window construction where a traditionally machined bottom rail is required
• Heritage joinery repairs where matching existing moulding details is essential

Fitting and handling

Before fitting, allow the rail to acclimatise indoors for at least 48 hours to reduce movement once installed. The bottom rail must be scribed and cut by the installer to match the angle of the existing window cill, and we recommend cutting a drip edge along the underside to reduce water ingress at the base of the lower sash. Prime all faces, including any cut ends, before painting to protect against moisture penetration.

FAQ

What is the difference between a sash window bottom rail and a meeting rail?

The bottom rail sits at the very base of the lower sash and meets the window cill when the sash is closed. The meeting rail sits at the top of the lower sash and meets the equivalent rail on the upper sash in the middle of the frame, forming the draught seal between the two sashes.

Do I need to cut the bottom rail to size before fitting?

Yes. The 1.2m length is supplied as a blank for you to cut to your required width. You will also need to cut the underside to match the angle of your existing cill and, if required, to add a drip edge to help shed water away from the base of the frame.

Can I order a sash window bottom rail in a specific timber species or length?

Nottage Timber Merchants can often supply sash window components in alternative timber species or cut-to-size lengths. Contact us directly with your requirements and we will advise on availability and lead times.

For related mouldings and joinery sections, browse the pine mouldings collection at Nottage Timber Merchants. We supply trade and retail customers throughout Bridgend and South Wales, with local collection available from our yard.