High-performance windows, doors and conservatories, meticulously manufactured
in-house, expertly installed with care

Family run since day one, we have been delivering admirable home improvement solutions to the Cornish community for over 30 years. As one of the few remaining fabricators in Cornwall, our unwavering dedication to the provision of quality products, superb customer service and flexible lead times is as strong as ever.

RJM Windows is firmly established as one of Cornwall’s leading double glazing experts, manufacturing and installing a contemporary collection of competitively priced uPVC and aluminium home improvement products
all under one roof.

Learn more about us

Brown flush sash window

Windows

From traditional Cornish cottages in St. Austell to new build harbourside developments in Falmouth, no matter the style, our refined range of versatile uPVC frames and slender aluminium windows are sure to add essential character and style. Coupled with energy efficient double or triple glazing, we're confident we have a window style to suit you or your client’s individual requirements.

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Solidor dark charcoal composite door left ajar

Doors

Enhanced security, thermal efficiency and kerb appeal are guaranteed with RJM entrance door installations. Choose from practical uPVC doors, robust composite doors or sleek, long-lasting aluminium entrance doors. Complete with matching handles, furniture and hardware, the door of your dreams is only a click away!

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Exterior shot of Edwardian conservatory

Conservatories

Whether you need extra room for a growing family or wish to transform a worn-out, cold and draughty conservatory into a space that remains at a pleasant temperature all year long, RJM can help. From planning through to completion, with RJM Windows you are only limited by your own imagination.

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Aerial view of tiled roof

Tiled Roofs

High performance solid tiled roofing is changing Cornwall’s residential landscape for the better. Improving a range of property styles, RJM tiled conservatory roofs can also be added to modern sunrooms, garden rooms and orangeries with ease and finesse. We offer the award-winning Guardian Warm Roof system, the highly respected Ultraframe roof and the esteemed Eurocell Equinox roof.

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Window and door showroom in St Blazey, Cornwall

Visit our showroom in
the heart of St Blazey

Due to the COVID-19 pandemic, our office and showroom remain closed to the public. However, we are accepting pre-booked appointments into the showroom following the latest guidelines and as always we are available to discuss your unique requirements by telephone or email. We can also provide contact-free, no-obligation quotes, carry out surveys and complete installations following strict operating procedures that will be explained in more detail once your order has been placed.

We look forward to welcoming you back very soon.

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Our work

Secure front doors for Newquay home

Visiting their local RJM showroom for expert advice, this client had a clear vision of updating their home security. After all, your home is only as secure as its weakest...

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Our work

Charming new build conservatory in St Ives

Serving St Ives and Cornwall communities for over 30 years, we couldn't wait to add essential extra space to this cramped St Ives home with a bespoke conservatory...

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What our customers say

Well-known for our strong family values, premium yet cost-effective home improvements and exceptional attention to detail, find out why our customers remain customers for life.

9.75

Par

January 13, 2021

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Very friendly and professional work force, finished to a high standard

Very pleased with standard of work and how they cleaned up once completed. Many thanks

10

Bodmin

January 13, 2021

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New window in porch

Excellent service from start to finish

9.75

Wadebridge

January 13, 2021

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Replacement windows

Hard working and friendly team, who discussed the plan of work with us each day, and kept us informed of progress. Great attention to detail, neat finishes and we’re really...

10

Truro

January 13, 2021

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Supply and fit new double glazed windows with PVCu frames

We are really pleased with our new windows. Our quotation was very reasonable and the quality of the materials and installation are great. The window fitter was very polite and...