Windows
Heritage & Contemporary
Timber Windows
Precision-engineered for listed buildings, conservation areas, and architect-led new builds—combining authentic detailing with modern thermal performance.
30yr
Rot guarantee
10yr
Workmanship
FSC
Certified
Heritage
Where authenticity matters
Traditional sash operation with modern thermal performance and conservation approval.
Box Sash Windows
Full traditional sash operation with hidden counterweights in box frames. Essential for listed buildings requiring authentic 18th/19th century mechanism.
- •Hidden counterweights with traditional pulleys
- •75mm slim frames with vacuum glazing (6.15mm thick)
- •Traditional horns, staff beads, decorative glazing bars
- •Suitable for Grade I, II*, and II listed buildings
Spring Balance Sash Windows
Classic sash appearance with concealed spiral spring balances. Identical external appearance to box sash with easier operation and narrower frames.
- •Slimmer 65mm frame depth (no weight box required)
- •Smooth spiral spring balance operation
- •Identical external appearance to box sash
- •Suitable for conservation areas
Contemporary
Refined detailing
For modern extensions, new builds, or heritage properties requiring subtle profiles.
Flush Casement Windows
Sashes sit flush with the frame when closed—no projecting mouldings or visible rebate. Contemporary aesthetic for Georgian, Regency, or modern architecture.
- •Flush finish—sash and frame align perfectly
- •58mm slim sightlines with double or vacuum glazing
- •PAS 24 security with multi-point locking
- •10-year factory paint finish guarantee
Storm-Proof Casement Windows
Rebated profile with sash sitting proud of frame—visible moulding step creates traditional cottage or Victorian character.
- •Rebated profile with visible moulding step
- •68mm frame depth accommodating double glazing
- •Multi-point espagnolette locking (PAS 24)
- •Custom glazing bar patterns available
Precision Details
Engineered to last
Specifications
Materials & Performance
Timber Selection
FSC® certified timber from responsibly managed forests. European Oak for durability, Accoya® acetylated softwood with 50-year guarantee, or engineered hardwood cores. Timber stores ~1 tonne of CO₂ per cubic meter—lowest embodied carbon of any window material.
Glazing & Vacuum Glass
Vacuum glazing achieves U-values as low as 0.49 W/m²K in a slim 6.15mm profile. Reduces external noise by up to 36dB. Essential for conservation areas requiring slim sightlines with modern thermal performance. 15-year sealed unit warranty.
Security & Certification
PAS 24:2016 certified—tested to resist forced entry for minimum 3 minutes. Multi-point locking with mushroom cam keeps. Secured by Design approved. Complies with Building Regulations Document Q and Document M.
Paint & Finishing
Factory-applied microporous paint systems. Breathable coatings protect timber while allowing moisture to escape. Available in natural stains, soft neutrals, or bold architectural shades. 10-year guarantee against flaking or peeling.
Hardware & Ironmongery
Ergonomic designs tested for 10,000+ operations. Finishes include satin brass, antique bronze, polished chrome, matt black, or brushed stainless steel. All hardware with 10-year mechanical guarantee.
Questions
Common enquiries
What's the difference between box sash and spring balance sash windows?
Box sash uses hidden weights and pulleys (authentic mechanism, 75mm frames). Spring balance uses concealed spiral springs (identical appearance, easier operation, narrower 65mm frames). Both achieve conservation approval.
Is vacuum glazing worth the extra cost?
Yes, for listed buildings or conservation areas requiring slim sightlines. Vacuum glazing achieves 0.49 W/m²K in a 6.15mm profile—approved by conservation officers, reduces energy bills by 60–70% vs single glazing.
Can you match existing glazing bar patterns?
Yes. We survey existing windows, photograph details, and measure bar spacings with laser accuracy. CNC machinery replicates profiles exactly, followed by hand finishing.
What guarantees do you offer?
30-year timber warranty against rot, 10-year workmanship guarantee, 10-year factory paint finish, 15-year sealed glazing warranty. All guarantees transferable to new property owners.
Start Your Project
Which window system
suits your project?
Book a consultation to discuss heritage constraints, thermal requirements, and detailed specifications.