Sash Windows in Harpenden

Harpenden's Timber Window Specialists

Harpenden is known for its elegant tree-lined streets, expansive common, and impressive collection of Edwardian and Victorian properties. This affluent Hertfordshire town features substantial family homes that demand windows of the highest quality. At Prime Sash Windows, we manufacture bespoke timber sash windows that honour Harpenden's heritage while delivering modern thermal and acoustic performance.

Harpenden contains several Conservation Areas, particularly around the High Street and older residential areas. Our team has extensive experience working with St Albans City and District Council to ensure windows meet heritage requirements while delivering the thermal efficiency and security modern homeowners expect.

Why Harpenden Homeowners Choose Us

Every window is manufactured in our workshop near London from engineered Accoya or premium hardwood. Accoya is guaranteed for 50 years against rot and fungal decay — far outlasting uPVC, which typically degrades within 20 to 25 years.

• Slimline double glazing — 4/16/4 sealed units with warm-edge spacer bars. U-value 1.4 W/m²K. Part L compliant.
• PAS24 security — multi-point espagnolette locking on all opening sashes.
• Traditional lead weights — we never use spring balances. Smoother operation, longer lifespan.
• Any colour — over 2,000 RAL colours and the full Farrow & Ball range. Dual colour available.
• FENSA registered — Building Regulations self-certification and certificate on completion.

Every window is spray-finished with premium Sikkens coatings — a multi-coat system including primer, undercoat, and topcoat for a flawless, lasting finish.

What We Offer

• Box sash windows — traditional double-hung sash windows with cords and lead weights.
• Casement windows — flush casement and stormproof designs.
• Slim Georgian bars — authentic planted or run-through glazing bars.
• Arched and shaped windows — gothic, segmental, and true-arch heads.
• Doors — French doors, bifold doors, sliding doors in matching timber.

How It Works

• 1. Design online — Use our 3D configurator to design and price your windows instantly.
• 2. Free survey — We visit your Harpenden property, measure precisely, and confirm the specification.
• 3. Manufacture — Your windows are built in our workshop. Typical lead time 6–8 weeks.
• 4. Installation — Our FENSA-certified fitting team installs your windows with minimal disruption.

Areas We Cover in Harpenden

We serve all areas of Harpenden including the Town Centre, Southdown, Batford, Kinsbourne Green, Wheathampstead, Redbourn, and surrounding villages. Our workshop location allows prompt service throughout the AL5 and surrounding postcodes.