Sliding Sash windows are one of our most requested window designs…

Our traditional Sliding Sash window is designed to offer homeowners the potential to perfectly match the existing timber product in their properties. Taking all the finest points of the traditional design, the UPVC version matches the aesthetic appeal while offering superior performance and maintenance benefits.

UPVC Sash Windows

Our Sliding Sash windows have two sashes that slide up and down independently from each other.

Weights and pulleys are replaced by sophisticated spring and spiral balances, and a unique tilt facility to enable cleaning of sashes safely from the inside. “A” rated Sash windows from Permaframe give you the option of tilting the sash inwards for gradual ventilation and ease of indoor cleaning.

UPVC Sash Windows
UPVC Sash Windows
Do your sash windows have EXTREME protection?

Security is extremely important to get right when it comes to windows, which is why our EXTREME collection focuses on combining advanced security features and exceptional design. Each window has 11 visible locking points - that’s three times the protection of a standard window! 

  • EXTREME enhanced security with centre VAULTBOLT and multi cam locking technology.
  • EXTREME enhanced durability with UNIQUE superglide gearbox ensures smooth operation.
  • EXTREME enhanced COMPRESSION and acoustics with interlocking hinge bolts and optimum weatherseals.

Sliding Sash Frame

Available in welded joints with 45-degree corner welds for a smooth, sleeker finish and mechanical joints to take the design to another level, the 90-degree welds give a more traditional sash window finish.

Ultimate Glass

High performance next generation glass for superb energy efficiency. With acoustic glass to block out the sound of a bust neighbourhood, or patterned privacy glass for a bathroom, we’ll have the perfect solution for you.

Sliding Sash Locking

Secured using a snail cam that is fitted to the top face of the sash. By turning the lever, the cam is released from its keep, giving you the option of either a key-locking or non-locking system.

Sliding Sash Handles

Our handles come in a range of colours to suit your home, they’re built to last with robust materials and quality finishes.

Weather Proofing

Wool pipe strips that provide an excellent layer of defence against the elements. Available with colour-matching wool pile to ensure that every detail of you window matches perfectly.

Versatile Design

As standard, our Sliding Sash Window also comes with a slide and tilt facility, allowing you to clean both the top and bottom sash from inside your home.
Improve the energy efficiency of your Somerset home…

Did you know that our Extreme window collection is rated A+ in terms of energy efficiency, the highest rating they can get? The windows harness heat from the sun and prevent heat from escaping. They create a temperature controlled enviornment that won’t overheat in summer.

The exclusive range has been designed to save you money in heating bills and create a more pleasant temperature within your home.

White UPVC Windows
Oak Envisage Flush Windows
White UPVC Windows


There’s so much more to your new windows than just choosing a window style. You’ll need to decide on the right colour finish, hardware and glazing too.

A full range of colour finishes for every Somerset homeowner…

UPVC can be finished in truly any shade you desire! While white finishes will always be a popular choice for windows, you can also choose from a number of trending and unique colours, such as Grey, Irish Oak, Chartwell Green and Whitegrain. If you can’t decide between two colours, you can opt for a dual-coloured finish, selecting one colour for the internal and one for the external.

Clear and privacy glazing available at Permaframe…

We can help you find the right glazing solution for your Extreme replacement windows. All our glazing options are tough, durable and thermally efficient, but they vary in design and clarity. If you want to create a more private space, we suggest you consider our privacy glazing. Despite blocking the view, it still welcomes plenty of natural light inside.

Custom-made handles for you…

Our many designs of handles have been perfected over the years. You can select from our more traditional styles or find a more contemporary look in our extensive range. You can view our many handle styles online, in our brochure or at our showroom.

Their secure locking system is designed to give you and your family peace of mind, putting your protection first.


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Want to speak with an Advisor? Give us a call on 01373 794000

Our friendly team will be pleased to help with any questions you may have.


We invite you to join us at our showroom in Frome, to browse our many products in person and speak with our team of advisors and designers about your next home improvement project.