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Application

Restoration of existing timber windows in need of repair and upgrade.

Description

Draught Proofing – Heritage-Friendly Comfort

At Sash Window Conservation, we combine traditional craftsmanship with modern materials to discreetly improve the performance of original windows and doors, without compromising their historic character.

Our hidden draught-proofing system reduces rattles and draughts, improves acoustic insulation, and ensures smoother window operation. As standard, we replace beading and cords/chains, and carry out sensitive timber repairs to retain the original fabric wherever possible.

We also offer glass upgrades – including laminated or double glazing – to enhance energy efficiency and noise reduction.

Benefits:

  • Up to 50% noise reduction
  • Improved comfort and energy efficiency
  • Preserves traditional aesthetics
  • Optional thermal and acoustic glass upgrades
  • Ideal for period homes and listed buildings, our draught-proofing solution keeps heritage windows looking original – and feeling like new.

General information

Color

White

Black

Brown

Other

Clear

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Finish

Painted

Material

Timber

Wood

Shape

Rectangle

Square

Circle

Oval

Length

Bespoke

Width

Bespoke

Height

Bespoke

Warranty description

Five year

Uniclass

Pr_30_59_98_96 Wood window unitsPrimary

CAWS

L10/210 Wood windows

L10/10 Wood windows

Specification data - Wood window units

Classification data

Third-party certification

FSC certified timber.

Dimensions and configurations

As drawing.

Manufacturer guidance

Insert requirements or refer to a drawing or schedule.

Product performance

-

Weather performance

-

UK exposure category

To BS 6375-1, 2000 Pa.

Air permeability

To BS EN 1026:2016, 600 Pa (Class 4).

Watertightness

To BS EN 1027:2000, 250 Pa (Class 7A).

Resistance to wind load

To BS EN 12211:2016, 2000 Pa (Class A5).

Environmental

-

Acoustic performance rating

-

Manufacturer guidance

Up to 50% reduction in noise.

Thermal

-

Whole window U-value

-

Manufacturer guidance

Levels of improvement subject to existing specification.

Frame

-

Chain of custody

FSC.

Glazing or infill

-

Requirements

Retain existing.
Single glazed (laminated).
Double glazed.

Hardware

Retain existing.
Replace cords/ chains.

Manufacturer guidance

The refurbishment includes the replacement of all cords/ chains unless requested to leave as original. 

Operation

-

Type

Manual.

Frame colour/ finish

White.
Black.
Brown.
Bespoke.

Repair and restoration

Timber repair.

Weatherpiles

Concealed draught proofing system.

Manufacturer guidance

Refurbishment includes the replacement of all beading, unless requested to leave as original. 

Sustainability data

Material

Timber
Wood

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