At Sash Windows London, we design and install bespoke sash windows and doors that combine period-perfect detailing with 21st-century performance. Whether you’re renovating a listed property or updating your family home, our timber products deliver enduring beauty, security, and efficiency – handcrafted for homes across London.
Our windows and doors are constructed from a hybrid of Engineered Red Grandis and Engineered Red Wood, each carefully chosen for its strengths. Cills and external frames are made from Engineered Red Grandis, which is known for its exceptional durability and resistance to moisture. Sashes and internal frames are crafted from Engineered Red Wood, offering strength and a refined finish. All timber used is Grade A FSC-certified and sustainably sourced, ensuring environmental responsibility and premium quality.
Enhanced Security and Weather Protection
Our windows feature an internally beaded system, meaning the glass is inserted securely from the inside. This design provides enhanced security by preventing external removal and improving longevity by eliminating external joints that can degrade over time due to water ingress. Additionally, we incorporate rubber gaskets around all joints of the window. These gaskets are applied to:
- The top sash (front and back)
- The bottom sash (front and back)
- The framework between the sashes (front and back) This meticulous sealing process ensures excellent compression between the sashes and frames, offering superior insulation and weatherproofing.
Traditional Aesthetics with Modern Performance
To maintain an authentic look, we incorporate a steep chamfer into the glass on the external framework, which serves two key purposes:
- It replicates the original putty lines of traditional single-glazed sash windows, ensuring a thin and elegant finish.
- It provides an efficient runoff for water, preventing pooling and reducing the risk of moisture damage over time.
Ease of Maintenance and Long-Term Durability
Thanks to our clip system for sash beads, long-term upkeep is effortless. Unlike traditional methods, where beads are nailed in place, our system allows easy removal, making decorating and maintenance straightforward. This ensures your sash windows continue to look and perform their best for years to come.
Industry-Leading Warranties for Peace of Mind
We stand behind the quality of our sash windows with industry-leading warranties:
- 30-year guarantee on timber
- 10-year guarantee on Paint finish
- 5-year warranty on ironmongery & seals
- 10 years on Workmanship
- 10 years on Glazing
Factory-Finished for Immediate Use
All trims and architraves are factory spray-finished to minimise post-installation work and reduce the need for additional painting and decoration once installed.
Fully equipped With High-Security Features
Our sash windows come equipped with essential security and usability features, including:
- Key-operated fitch locks
- Angel restrictors
- Lift hooks
Additionally, our windows meet PAS 24 and Part Q security standards and achieve an impressive U-value of 1.3 W/m²K, ensuring exceptional energy efficiency and compliance with modern building regulations.
Book Your Free Survey Today
Ready to complete your home with handcrafted timber windows or doors?
Speak to our expert team and arrange a free site survey today. No pressure, just honest advice.
FAQs About Our Timber Sash Windows & Doors
Are your sash windows suitable for listed buildings or conservation areas?
Yes. Our timber sash windows are crafted to meet conservation standards and planning requirements. We offer slimline double glazing and traditional detailing like lambs tongue mouldings and putty bead bars for a period-authentic finish.
What timber do you use, and why?
We use a hybrid of Engineered Red Grandis for external frames and cills, and Engineered Redwood for internal sections. Both are sustainably sourced, FSC-certified, and chosen for their strength, stability, and resistance to moisture.
How energy efficient are your windows?
Our sash windows achieve U-values as low as 1.3 W/m²K, exceeding current building regulations. Double glazing and advanced sealing help reduce heat loss, improve insulation, and lower energy bills.
What security features are included?
All sash windows come with key-lockable Fitch locks, Angel restrictors, and lift hooks. They’re also internally glazed for added protection and meet PAS 24 and Part Q security standards.
Do you offer custom colours and finishes?
Yes. We offer a wide range of finishes, including RAL colours and wood stains, as well as traditional features like sash horns and decorative bars. Every window is made to order to suit your home’s character.
What kind of warranty do you offer?
We provide industry-leading guarantees, including up to 30-years on timber and 10-years on workmanship, glazing, and paint finishes.
