# Sash Window Draught Proofing > Expert sash window draught proofing, restoration, and secondary glazing across London and the Home Counties. 15+ years specialising in Victorian, Georgian and Edwardian period properties. Family-run heritage specialists based in London. We service Grade II listed buildings, Conservation Area properties, and period homes across all inner London postcodes (SW, W, N, SE, NW, WC, EC) and the surrounding Home Counties. Typical projects: full sash draught proofing, sash rope/cord and pulley replacement, staff and parting bead renewal, secondary glazing for noise and thermal upgrades, and full sash window restoration. Contact: 07999 333 533. ## Core Services - [Draught Proofing](https://sash-whisper-windows.lovable.app/draught-elimination): Eliminate draughts and cut heat loss by up to 30%. - [Secondary Glazing](https://sash-whisper-windows.lovable.app/secondary-glazing): Premium thermal and acoustic upgrade for period sash windows. - [Secondary Glazing vs Draught Proofing](https://sash-whisper-windows.lovable.app/secondary-glazing-vs-draught-proofing): Compare costs, performance and use cases. - [Sash Window Repair](https://sash-whisper-windows.lovable.app/sash-window-repair): Repairs to frames, sashes, beads and ironmongery. - [Sash Window Refurbishment](https://sash-whisper-windows.lovable.app/sash-windows-refurbishment): Full overhaul of period sash windows. - [Sash Rope Replacement](https://sash-whisper-windows.lovable.app/sash-rope-replacement): Cord, pulley and weight renewal. - [Window Restoration](https://sash-whisper-windows.lovable.app/window-restoration): Comprehensive restoration for period homes. - [Heritage Window Restoration](https://sash-whisper-windows.lovable.app/heritage-window-restoration): Listed building and conservation-area work. - [Noise Reduction](https://sash-whisper-windows.lovable.app/noise-reduction): Acoustic solutions for traffic and urban noise. - [Thermal Efficiency](https://sash-whisper-windows.lovable.app/thermal-efficiency): U-value improvements for period windows. - [Window Security Solutions](https://sash-whisper-windows.lovable.app/window-security-solutions): Sash locks and security upgrades. - [Emergency Window Services](https://sash-whisper-windows.lovable.app/emergency-window-services): Same-day repairs and boarding. - [Window Maintenance Services](https://sash-whisper-windows.lovable.app/window-maintenance-services): Ongoing care plans. - [Victorian Sash Window Draught Proofing](https://sash-whisper-windows.lovable.app/victorian-sash-window-draught-proofing): Specialist Victorian-property service. - [Cost of Draught Proofing](https://sash-whisper-windows.lovable.app/cost-of-draught-proofing): Transparent pricing guide. ## Areas Served - [Service Areas Overview](https://sash-whisper-windows.lovable.app/areas): All London and Home Counties locations covered. - [Postcode Index](https://sash-whisper-windows.lovable.app/postcodes): Find us by London postcode (SW, W, N, SE). - [Kensington](https://sash-whisper-windows.lovable.app/areas/kensington) - [Chelsea](https://sash-whisper-windows.lovable.app/areas/chelsea) - [Belgravia](https://sash-whisper-windows.lovable.app/areas/belgravia) - [Mayfair](https://sash-whisper-windows.lovable.app/areas/mayfair) - [Marylebone](https://sash-whisper-windows.lovable.app/areas/marylebone) - [Notting Hill](https://sash-whisper-windows.lovable.app/areas/notting-hill) - [Hampstead](https://sash-whisper-windows.lovable.app/areas/hampstead) - [Highgate](https://sash-whisper-windows.lovable.app/areas/highgate) - [Islington](https://sash-whisper-windows.lovable.app/areas/islington) - [Richmond](https://sash-whisper-windows.lovable.app/areas/richmond) - [Wimbledon](https://sash-whisper-windows.lovable.app/areas/wimbledon) - [Fulham](https://sash-whisper-windows.lovable.app/areas/fulham) - [Clapham](https://sash-whisper-windows.lovable.app/areas/clapham) - [Battersea](https://sash-whisper-windows.lovable.app/areas/battersea) - [Putney](https://sash-whisper-windows.lovable.app/areas/putney) - [Barnes](https://sash-whisper-windows.lovable.app/areas/barnes) - [Chiswick](https://sash-whisper-windows.lovable.app/areas/chiswick) - [Greenwich](https://sash-whisper-windows.lovable.app/areas/greenwich) - [Blackheath](https://sash-whisper-windows.lovable.app/areas/blackheath) - [Dulwich](https://sash-whisper-windows.lovable.app/areas/dulwich) - [Fitzrovia](https://sash-whisper-windows.lovable.app/areas/fitzrovia) - [Little Venice](https://sash-whisper-windows.lovable.app/areas/little-venice) - [Primrose Hill](https://sash-whisper-windows.lovable.app/areas/primrose-hill) - [St John's Wood](https://sash-whisper-windows.lovable.app/areas/st-johns-wood) ## Blog - [Blog Index](https://sash-whisper-windows.lovable.app/blog): Guides on Part L, heritage compliance, and sash window efficiency. - [Part L 2026 vs Your Sash Windows](https://sash-whisper-windows.lovable.app/blog/part-l-2026-sash-windows-london): What London homeowners need to know about the March 2026 Part L update, heritage exemptions, and compliant efficiency upgrades. - [Acoustic Secondary Glazing: 50dB Noise Reduction](https://sash-whisper-windows.lovable.app/blog/traffic-noise-acoustic-secondary-glazing-50db): How 10.8mm Stadip Silence acoustic glass and a 150mm air gap cut London traffic noise by up to 50dB in period sash windows. - [Is Your Sash Window Safe? 5 Warning Signs You Need Emergency Sash Cord Replacement](https://sash-whisper-windows.lovable.app/blog/emergency-sash-cord-replacement-warning-signs): Original sash windows are durable, repairable and an important part of many Victorian and Georgian homes. However, their safety depends on working… - [Secondary Glazing vs. Double Glazing for Listed Buildings: Which Passes Conservation?](https://sash-whisper-windows.lovable.app/blog/secondary-glazing-vs-double-glazing-listed-buildings): Improving the thermal performance of a listed building requires more than choosing the most efficient glass available. The proposed work must also… - [How to Cut Heating Bills by 30% Without Replacing Your Windows](https://sash-whisper-windows.lovable.app/blog/cut-heating-bills-without-replacing-windows): Replacing original sash windows is not the only way to improve thermal efficiency. In many Victorian and Georgian properties, professional sash window… - [The Hidden Cost of Ignoring a Draughty Sash Window (Winter 2026 Edition)](https://sash-whisper-windows.lovable.app/blog/hidden-cost-draughty-sash-window): A draughty sash window is more than an inconvenience. Gaps around the sashes, meeting rails, parting beads and frame allow heated air to escape and… - [Meet the Craftsmen: How a 50dB Noise Reduction Actually Happens in a Chelsea Townhouse](https://sash-whisper-windows.lovable.app/blog/chelsea-townhouse-50db-noise-reduction-case-study): A claim of “up to 50dB noise reduction” should never be treated as a feature of the glass alone. In a period property, acoustic performance depends on… - [Restoring Original Crown Glass: Why Your Victorian Windows Deserve a Specialist](https://sash-whisper-windows.lovable.app/blog/restoring-original-crown-glass-victorian-windows): Original crown glass and historic cylinder glass are among the most distinctive features of Victorian sash windows. Their gentle waviness, small… - [Draught Proofing Period Properties: The Ultimate Guide for London Homeowners](https://sash-whisper-windows.lovable.app/blog/draught-proofing-period-properties-guide): Georgian and Victorian homes across Chelsea, Kensington, Westminster and Hampstead are valued for their original timber windows, handmade glass and… - [The Science of Secondary Glazing: How a 150mm Air Gap Cuts Heat Loss by 70%](https://sash-whisper-windows.lovable.app/blog/science-of-secondary-glazing-150mm-air-gap): For owners of period properties, improving window performance involves more than choosing the lowest U-value. Original sash windows contribute to a… - [Thermal Efficiency for Sash Windows: 10 Ways Your Period Property Isn't Holding Heat](https://sash-whisper-windows.lovable.app/blog/thermal-efficiency-sash-windows): Victorian and Georgian terraces are valued for their proportions, timber joinery and original architectural details. However, many were built before… - [Sash Window Soundproofing Cost Explained in Under 3 Minutes](https://sash-whisper-windows.lovable.app/blog/sash-window-soundproofing-cost): If you are researching sash window soundproofing cost, the two most practical retrofit options are professional draught proofing and secondary glazing. - [7 Mistakes You're Making with Victorian Sash Window Repair (and How to Fix Them)](https://sash-whisper-windows.lovable.app/blog/victorian-sash-window-repair-mistakes): Victorian sash windows were built to be repaired. Their timber boxes, glazing bars, pulleys, counterweights and sash cords can often be restored… - [Grade II Listed Window Draught Proofing: What Conservation Officers Don't Want You to Know](https://sash-whisper-windows.lovable.app/blog/grade-ii-listed-window-draught-proofing): Owning a Grade II listed property does not mean you must accept cold rooms, rattling sashes and high heating bills. It means that improvements need to… - [Secondary Glazing Vs. Draught Proofing: Which Is Better For Your Period Sash Windows?](https://sash-whisper-windows.lovable.app/blog/secondary-glazing-vs-draught-proofing-sash-windows): Period sash windows provide architectural character, but original single glazing and ageing seals can reduce comfort, increase heating demand and allow… ## Reference - [Gallery](https://sash-whisper-windows.lovable.app/gallery): Before/after examples of completed work. - [Learn More](https://sash-whisper-windows.lovable.app/learn-more): Knowledge hub covering techniques and benefits. ## Optional - [Sitemap Index](https://sash-whisper-windows.lovable.app/sitemap-index.xml) - [Main Sitemap](https://sash-whisper-windows.lovable.app/sitemap.xml) - [Image Sitemap](https://sash-whisper-windows.lovable.app/image-sitemap.xml) ## Blog Categories - [Draught Proofing](https://sash-whisper-windows.lovable.app/blog/category/draught-proofing): Conservation-grade draught proofing for Victorian and Georgian sash windows: brush seals, staff beads and meeting rails. - [Secondary Glazing](https://sash-whisper-windows.lovable.app/blog/category/secondary-glazing): Acoustic and thermal secondary glazing for London period properties, including air gaps, glass specifications and noise reduction. - [Restoration & Repair](https://sash-whisper-windows.lovable.app/blog/category/restoration-repair): Sash cord replacement, timber repair, crown glass and traditional joinery for original London sash windows. - [Heritage & Listed Buildings](https://sash-whisper-windows.lovable.app/blog/category/heritage-listed): Grade II listed and conservation area window upgrades, consent requirements and heritage-sympathetic specifications. - [Energy & Costs](https://sash-whisper-windows.lovable.app/blog/category/energy-costs): Heat loss, heating bills, Part L compliance and the real cost of upgrading period sash windows in London.