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Windows Doors Bi-Folds &



The award-winning aluminium window and door with a full-width thermal core. Combine aluminium aesthetics with class leading energy efficiency. our sleek, architectural finish aluminium windows and doors with a contemporary style are designed to be 25% more thermally efficient than most aluminium alternatives. From the design of the unique thermal core and the outer faces of the frames which are high grade aluminium, positioned to add the greatest structural rigidity, to the 60-80 micron thick (exceeding marine grade) powder coat finish, All our fixings used are chosen to resist corrosion and multi-point locks and purpose designed hinges have been precision engineered to perform consistently every single time.


Windows with a warmcore come with multipoint locking, internal beading and are backed by our 10 year guarantee, available as casement or tilt and turn windows, and with flush sash option that brings the outer-frame perfectly level with the opening part of the window. Stylish and contemporary.

Bi-Folding Doors 

Bi-folding doors are a popular design they are very Robust and designed to take the weight and glide seamlessly along aluminium top and bottom tracks using stainless steel rollers, making it easy for you to open and close them.  The combination of a multi-point locking system, locking shoot-bolts, high security hinges and toughened glass make our bi-Folding doors secure and warm. Our bi-folding doors come in different colours and configurations, with door leaves concertinaing to one or both sides.

Alu​minium​ Sliding Patio Doors 

Patio Doors are designed with exceptional thermal performance with bi-directional locks creating a tangible sense of security all fitted with safety brake and custom designed a high quality, lift-to-lock handle unique warecore Patio Door.

Aluminium Lantern Roof Light 

The purpose designed Stratus aluminium lantern roof system is discreet yet stylish. this lantern roof allows light to flood into your home, the ideal modern lantern solution, coupling sleek contemporary looks with outstanding performance.


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Thank you for you enquiry, we will be in-touch soon. Kind Regards Leivers & Millership 0115 9642040

From terraced housing to stately homes, Sash windows enable old-style properties to retain their heritage, character and charm. View our Range of Sliding Sash Windows.

Trusted Local Company 

We are a family business you can 

Trust with nearly 30 Years Experience.

Recommended by Many

80% of our business comes from recommendation from our many happy customers.

Manufacture Ourselves

We have been manufacturing and installing Home Improvements since 1990.

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We give a fair and honest price first time.

See our Price Promise.

Low Deposits

Deposits from £80 then pay nothing till you're completely happy.

10 year Guarantee 

All our products and workmanship come with a full 10 years Guarantee.