Extreme Window & Door Collection

Supremely stylish and secure

Unique design options, unrivalled security and exceptional value for money are just a handful of the reasons why hundreds of homeowners have took the decision to switch to our Extreme window and door range. The UPVC profile that’s used exclusively throughout the Extreme Collection allows designs to blend seamlessly with any home. Industry-leading security features keep your family safe, whilst our thermally efficient glazing options ensure your home warm in winter and cool in the summer.

Extreme UPVC Windows


The Extreme window collection has been crafted in a way that makes it totally adaptable to most existing home décors. Strong, sleek frames achieve a subtly minimalistic look, whilst offering performance levels that you’d typically associate with traditional timber. This blend of features make Extreme the most technologically advanced range of windows available today.

As affordable as they are adaptable, take your pick from our modern casement window or opt for something a little more traditional.


Extreme UPVC Windows


Elegantly functional – there’s quite simply and Extreme door style to suit every preference. With a broad range of colours, designs and finishes, you’re guaranteed to find something truly in keeping with your style and budget. The entire range is supported by a vast selection of decorative glass, custom-built side screens and bespoke panel designs.

Safety comes first in all our products, which is why all our doors are fitted with the latest high-performance security locks.


Extreme UPVC Doors


French doors are ideal for families looking for simple access to the garden or outdoor living area, allowing for unmatched practicality.

Strong, dependable and fashionable, our Extreme French door range is one of our more popular collections, with a real upsurge in demand in recent years.


Extreme UPVC French Doors


Sliding patio doors are a lifesaver for homes where space is at a premium, allowing for ample opening width without the usual internal or external obstruction. Much like our French Doors, extra-large patio doors have grown rapidly in popularity in recent years.


Extreme UPVC Patio Doors

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Credit is subject to status and affordability. Terms & Conditions Apply. Speedy Build Ltd FRN: Registered Address: 38 Salisbury Road, Worthing, West Sussex, BN11 1RD. Registered No. 10670175 & VAT No. 311 6048 44 trading as Speedy Home Improvements is a credit broker, not the lender and is authorised and regulated by the Financial Conduct Authority. Credit is provided by Novuna Personal Finance, a trading style of Mitsubishi HC Capital UK PLC. Authorised and Regulated by the Financial Conduct Authority (Register no. 704348)