Business Details
19 Years
experience
Your Trusted Partner for Window & Door Solutions in London
Core Sash Windows is a London-based specialist in bespoke window and door solutions with over 18 years of experience. Our expertise lies in crafting and installing sash windows, casement windows, and doors tailored to preserve traditional aesthetics while incorporating modern benefits like energy efficiency and noise reduction. We pride ourselves on delivering a comprehensive service, from initial consultation to final installation, including plaster repairs, traditional sand-and-cement pointing, and hand-painted finishes.Our team of skilled carpenters ensures meticulous attention to detail, using FSC-certified sustainable materials and engineered timber. Accredited by FENSA, a Which? Trusted Trader, and a GGFi member, we guarantee compliance and peace of mind. Our commitment to quality, competitive pricing, and customer-focused service has earned us a reputation for excellence across London and nationwide.
Services
Sash Window Replacement
Casement Window Replacement
Door Replacement
Draught Proofing
Comprehensive Fit Service
Details
- Year established: 2007
Highlights and features
- Over 18 years of experience in window and door installations in London
- FENSA-approved installations ensuring compliance with building regulations
- Which? Trusted Trader status reflecting customer satisfaction and reliability
- Unique comprehensive service including traditional sand-and-cement pointing
- Skilled carpenters with expertise in restoring historic and listed buildings
Associations and certifications
- FENSA
- Which? Trusted Trader
- GGFi
What people say
Exceptional service
Skilled and friendly team
Spotless work environment
Competitive pricing
Energy-efficient results
Services
Sash Window Replacement
Our sash window replacement service combines traditional craftsmanship with modern energy efficiency. We offer full box replacements or sash-only refurbishments, using FSC-certified timber and engineered materials. Each installation includes plaster repairs, sand-and-cement pointing, and hand-painted finishes to ensure a seamless blend with your propertys character. Ideal for Victorian terraces and listed buildings.
Casement Window Replacement
Upgrade your casement windows with bespoke timber or aluminium designs tailored to your property. Our comprehensive service includes frame refurbishment or replacement, multipoint locking systems, and easy-clean hinges. We ensure minimal disruption, with full painting and sealing to maintain aesthetic and functional integrity, perfect for modern and heritage homes alike.
Door Replacement
Transform your home with custom front or garden doors featuring secure multipoint locks and draught-proofing seals. Our service includes frame adjustments, architrave fitting, and hand-finished painting. Whether replicating traditional designs or creating modern statements, we deliver durable, energy-efficient solutions that enhance security and curb appeal.
Draught Proofing
Enhance comfort and reduce energy bills with our draught-proofing solutions for sash windows and doors. We use precision seals, weatherstripping, and traditional techniques like sand-and-cement pointing. The process involves repairing frames, installing draught seals, and restoring finishes, ensuring your property retains its character while meeting modern efficiency standards.
People
Sean Mac Anbhaird
Director
Sean founded Core Sash Windows in 2007 after a career as a lead carpenter in the US and UK. He identified a gap in the market for high-quality sash window installations that preserve original design details while incorporating modern efficiency. His leadership ensures the company maintains its focus on craftsmanship and customer satisfaction.
Questions
What areas do you serve?
We operate primarily in London but also offer services nationwide for window and door installations.
Are your installations FENSA-compliant?
Yes, all our window and door installations are FENSA-approved, ensuring compliance with UK building regulations.
Do you offer draught-proofing services?
Yes, we specialise in draught proofing for sash windows and doors using durable seals and traditional techniques.
What materials do you use?
We use FSC-certified European Redwood, engineered oak sills, and sustainable timber for most projects.
Can you match existing window designs?
Yes, our team can replicate traditional designs or create custom solutions to suit your property’s aesthetic.
