Nottage Timber Merchants stock a range of sash window parts alongside a full selection of pine mouldings to complete your joinery project. Order online for delivery to the Bridgend area and across South Wales, or visit us in store for trade pricing and cutting to size.
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-65%$9.86
$3.45The Story
Sash window outer casing forms the exterior framework of a traditional sash window, protecting the box frame from weather while preserving the period character of the property. Available in 1.2m lengths, it is precision machined from sustainably sourced softwood timber to integrate cleanly with staff beads, liners and sills.
Specifications
| Property | Detail |
|---|---|
| Material | Softwood timber |
| Length | 1.2m (1200mm / 4ft) |
| Profile | Outer casing section for sash window box frame |
| Finish | Machined, ready to prime and paint |
| Use Class | Above ground, sheltered (Use Class 2) |
What it's used for
- Replacing damaged or rotten outer casings on existing period sash windows
- Full sash window restoration projects on Victorian, Edwardian and listed buildings
- New build or replica sash window construction where traditional joinery detailing is required
- Matching original box frame profiles during conservation or planning-approved repairs
Fitting and handling
Allow the timber to acclimatise in the intended environment for at least 48 hours before installation, particularly in older properties with variable humidity levels. Fix using appropriate exterior wood adhesive and corrosion-resistant screws or nails, ensuring all end grain and cut surfaces are sealed with a suitable primer before painting. Store flat and off the ground under cover to prevent cupping or moisture ingress prior to fitting.
FAQ
What is a sash window outer casing?
The outer casing is the outermost vertical timber that forms the sides of the sash window box frame. It sits against the masonry or external wall lining and works together with the pulley stile, liners and sill to contain the sash weights and guide the sliding sashes.
Can I use this casing on a listed building repair?
Yes. Machined softwood outer casings are widely accepted for like-for-like repairs on listed buildings, provided the profile and dimensions match the original. We recommend confirming the exact profile with your conservation officer before ordering if approval is required.
Do I need to treat the timber before fitting?
The casing is supplied ready to finish. All faces, edges and end cuts should be primed before installation, and a quality exterior paint system applied to achieve a durable weather-resistant finish. This also helps the timber meet Use Class 2 requirements for above-ground exterior joinery.
Nottage Timber Merchants stock a range of sash window parts alongside a full selection of pine mouldings to complete your joinery project. Order online for delivery to the Bridgend area and across South Wales, or visit us in store for trade pricing and cutting to size.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Sash window outer casing forms the exterior framework of a traditional sash window, protecting the box frame from weather while preserving the period character of the property. Available in 1.2m lengths, it is precision machined from sustainably sourced softwood timber to integrate cleanly with staff beads, liners and sills.
Specifications
| Property | Detail |
|---|---|
| Material | Softwood timber |
| Length | 1.2m (1200mm / 4ft) |
| Profile | Outer casing section for sash window box frame |
| Finish | Machined, ready to prime and paint |
| Use Class | Above ground, sheltered (Use Class 2) |
What it's used for
- Replacing damaged or rotten outer casings on existing period sash windows
- Full sash window restoration projects on Victorian, Edwardian and listed buildings
- New build or replica sash window construction where traditional joinery detailing is required
- Matching original box frame profiles during conservation or planning-approved repairs
Fitting and handling
Allow the timber to acclimatise in the intended environment for at least 48 hours before installation, particularly in older properties with variable humidity levels. Fix using appropriate exterior wood adhesive and corrosion-resistant screws or nails, ensuring all end grain and cut surfaces are sealed with a suitable primer before painting. Store flat and off the ground under cover to prevent cupping or moisture ingress prior to fitting.
FAQ
What is a sash window outer casing?
The outer casing is the outermost vertical timber that forms the sides of the sash window box frame. It sits against the masonry or external wall lining and works together with the pulley stile, liners and sill to contain the sash weights and guide the sliding sashes.
Can I use this casing on a listed building repair?
Yes. Machined softwood outer casings are widely accepted for like-for-like repairs on listed buildings, provided the profile and dimensions match the original. We recommend confirming the exact profile with your conservation officer before ordering if approval is required.
Do I need to treat the timber before fitting?
The casing is supplied ready to finish. All faces, edges and end cuts should be primed before installation, and a quality exterior paint system applied to achieve a durable weather-resistant finish. This also helps the timber meet Use Class 2 requirements for above-ground exterior joinery.
Nottage Timber Merchants stock a range of sash window parts alongside a full selection of pine mouldings to complete your joinery project. Order online for delivery to the Bridgend area and across South Wales, or visit us in store for trade pricing and cutting to size.






















