Window seal repair cost: How much should you budget in 2025

Spotted that stubborn foggy layer between your window panes? You’re facing one of the UK's most common home maintenance challenges: damaged window seals. Unlike dirt that can be wiped away, this condensation is trapped inside your double glazing, signaling an issue that affects both your home’s appearance and energy efficiency.

Across the UK, professional window seal repairs typically cost £25 to £70 per seal, though prices fluctuate significantly based on your location, window type, and the job’s complexity. To help you budget more effectively, this post will outline all the cost factors and what to expect when hiring a professional handyman. 

Price list for window seal repair

Estimate your window seal repair costs by referring to the tables below:

Sometimes, a simple window seal repair might reveal more extensive issues requiring additional services. These supplementary costs can significantly impact your overall budget, so it's wise to consider them when planning. 

A handyman installing a window seal. (Source: Shutterstock)

Factors affecting window seal replacement costs

When budgeting for window seal repairs, several key factors will influence your final bill. Understanding these variables helps you get more accurate quotes and avoid those surprise costs that nobody wants. 

Window type and design

Different window styles come with different price tags for seal replacement, and knowing which type you have can help you budget more accurately. For instance, triple-pane windows typically run £80 to £150 per window due to their more complex construction. If you have bay or bow windows, expect to pay higher (around £1,000 to £2,500) because of their unique shapes and challenging access points. 

More importantly, you need to consider the age and brand of your windows. Many homeowners don't realize that older or discontinued models might require custom-ordered seals, which drives up material costs and labour time. 

Extent of damage

Minor condensation with just light fogging might be resolved at the lower end of the price range. However, windows with visible water pooling or telltale mineral deposits on the glass often require a complete IGU (Insulated Glass Unit) replacement instead of just a seal repair, pushing costs further. 

The worst-case scenario? When moisture has compromised the window frame, requiring additional carpentry work that can add another £35 to £1,400 to your total

Project duration and accessibility factors

Window seal repair professionals typically charge between  £50 to £170 per hour, which adds up quickly, depending on how complicated your job becomes. What many homeowners don’t realize until they get the final bill is that window location will affect both labour time and total cost. For instance, hard-to-reach windows require more time and safety precautions to repair properly.

A window that takes 30 minutes to fix under ideal conditions might require 90 minutes or more when access is challenging. This accessibility factor can add  £50 to £100 to your project cost when special equipment like extension ladders, scaffolding, or mechanical lifts becomes necessary. 

Window size and number

If you have many damaged windows at home, you must allocate more funds for restoration services. Several windows with broken seals also require more repair materials. Broken window seal repair costs depend on the window type. 

What are the processes involved in window seal repair?

Professionals mount windowpanes on frameworks called sashes, which hold the glass panes in place. Some use seals of pre-shaped material, while others use glazing putties to seal gaps.

Each sash is part of a jamb. When windows open, sashes slide or turn inside jambs. Handle all movable junctions carefully so that they continue to function correctly. Jambs are inside window frames, and every junction between them needs a seal.

During sealing, window specialists check all the seams and frames for cracks, decay, and moisture damage. Repairs or upgrades add to the cost. The required amount of sealant depends on window size and damage extent. Before sealing your windows, you must clean, repair, or replace their binding mechanisms.

What are the different types of window seals?

There are three common types of window seals. Read below to know the purpose of each one and determine which one is best for your home’s energy efficiency.

Silicone Caulking

This type of window sealant contains liquid compounds pressed around window frames to make them water-resistant. The sealant helps protect your windows from precipitation and strong drafts.

Weatherstripping

Weatherstripping is usually for areas of operable windows that leave gaps when you close them. Weatherstripping acts as a barrier to prevent the entry of air or moisture. Foam and tubular vinyl/rubber are common types of weatherstripping. Check how much weather stripping costs and identify which material is best for your windows. 

Insulating glass units

Window experts use IGUs to keep residences warmer in winter and cooler in summer. IGUs typically consist of two or more glass panes separated by a spacer material and sealed together at the edge. The insulating airspace contains noble gases, such as argon or krypton. Each glass pane has two surfaces, so standard double-paned IGUs have four sides.

A handyman carefully applying weatherstripping to a window frame. (Source: Shutterstock)

Ready to fix those foggy windows?

Now that you know how much a broken window seal repair costs, you can start reaching out to potential Taskers. When creating your task, be specific about the symptoms you’re seeing (foggy glass, condensation between panes) and include clear photos taken in good lighting. Don’t forget to mention any access challenges like height or obstructions that might affect the job. 

Post your window seal repair task today and get connected to a professional handyman now!