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Sash windows repair and double glazing Harrow

Restoring and enhancing Harrow’s sash windows with expert repair and energy-efficient double glazing

Sash windows repair and double glazing Harrow Sash windows repair and double glazing Harrow

Could any of these sash window problems be affecting your home’s comfort?

Rotten window frames

Rotten window frames

Heat loss through single glazing

Heat loss through single glazing

Draughts and rattling

Draughts and rattling

External noise

External noise

Condensation on windows

Condensation on windows

Sash window repairs Harrow

Struggling with drafty, rattling sash windows? Our repair services in Harrow can resolve these common issues, restoring comfort and energy efficiency to your home without compromising its classic appearance.

Before and after sash window refurbishment

Restoring the original beauty and functionality of French doors by repairing any damage and restoring their smooth operation.

This service also includes improving the door’s energy efficiency and weather resistance.

Replacing rotted components of windows, such as sills or frames, with new materials for a long-lasting solution.

Freeing up windows that are stuck or painted shut to allow for proper operation.

Retrofitting double glazing to sash windows Harrow

Harrow homes with traditional sash windows often experience drafts and poor insulation.

Our retrofit double glazing service installs energy-efficient glass into your existing sash windows, improving thermal efficiency and noise reduction.

Keep the authentic character of your windows while enjoying a warmer, more comfortable home.

Converting single-glazed windows in listed properties can be challenging, but with our tailored double glazing service, we make it possible while adhering to conservation requirements.

Using slimline or vacuum double glazing, we retrofit your existing wooden frames to maintain the historic character of your windows.

Our expertise ensures that you enjoy the modern benefits of reduced energy bills and better insulation without compromising the heritage aesthetics of your listed property.

double glazed sash window

Sash window services in Harrow

Our projects

Why choose Six over Six Windows

We specialize in double glazing for Grade II listed properties, ensuring compliance with regulations while preserving the historical integrity of your windows.

Our experience allows us to upgrade your windows with modern glazing solutions without compromising the original aesthetics.

Our extensive portfolio of completed projects demonstrates our expertise and commitment to quality.

From small repairs to full restorations, we consistently deliver high-standard results that meet our clients’ expectations.

Our comprehensive restoration service includes everything from repairing rot and damage to reglazing and draught-proofing your windows.

Our goal is to return your windows to their original form while enhancing their performance, ensuring they stay functional, aesthetically pleasing, and energy-efficient for years to come.

Sash windows repair Harrow

Where we work


Map London

Our service area in London

Map London

Benefits of wooden windows restoration

Save on redoing the interior and exterior after fitting new windows

Save on redoing the interior and exterior after fitting new windows

Reduce external noise

Reduce external noise

Save on energy bills and heating

Save on energy bills and heating

Fix draughts

Fix draughts

Meet new energy efficiency standards

Meet new energy efficiency standards

Improve comfort and value of your property

Improve comfort and value of your property

Save on complete window replacement

Save on complete window replacement

Frequently asked questions

Do you offer restoration for all types of historic windows?

Yes, we offer restoration services for all types of historic windows, including sash, casement, and bay windows. Our team is experienced in preserving the unique architectural details while improving performance.

Will the restoration improve energy efficiency?

Yes, restoration can significantly improve energy efficiency, especially if draught-proofing and double glazing are added. These upgrades reduce heat loss, eliminate drafts, and improve overall insulation.

What methods do you use to repair decayed or damaged window frames?

We use techniques such as wood splicing, epoxy resin repairs, and full timber replacement for more severe damage. These methods allow us to restore the frame’s strength and appearance, ensuring a long-lasting result.

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