Window Draught Proofing: A Cost-Effective Alternative to Replacement

Draughty windows are one of the most common causes of heat loss in older London homes — and in many cases, draught proofing is a smarter investment than full replacement. Here is how to identify the problem and choose the right fix.

What This Guide Covers

• Draught proofing cost: £80–£200 per window — a fraction of full replacement cost
• Suitable for uPVC, timber, and aluminium frames where seals or hardware have failed
• Self-adhesive foam strips: cheapest option — but brush pile pile seals are more durable
• Window handles and hinges: worn or misaligned hardware is often the primary draught source
• When to replace vs draught proof: if the frame is rotting or glass is misted, replacement is better

Introduction

London homeowners face unique challenges when it comes to glazing — from period properties with sash windows in conservation areas, to modern developments requiring structural glass installations. Getting the right advice before you commit can save you significant time and money.

At BuilderFix Glazing, we have completed thousands of glazing jobs across Greater London and Surrey — from emergency repairs in Kensington and Chelsea, to bespoke walk-on glass installations in Mayfair and Belgravia. This guide is based on real experience and the questions our customers ask us most often.

What Does This Typically Cost in London?

Costs vary depending on the type and size of work, the glass specification, frame material, and access. As a general guide, always obtain a free written quote before committing — this protects you from unexpected charges.

At BuilderFix Glazing, we provide free, no-obligation written quotes for all work. Our prices are transparent and fixed before we start — no surprises on the invoice.

What to Ask When Getting a Quote

• Is the price fixed, or could it change once work starts?
• What glass specification is included?
• Are all fixings, sealants and finishing included?
• What compliance documentation will I receive?
• What happens if there is an issue after completion?