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More than 500,000 installations

Kommerling Sliding
Sash Windows

Technical brilliance meets authentic design

Like so many of our customers, we cannot help but admire the simple elegance and classic detailing of traditional sash windows. Evocative and nostalgic, sash windows are the perfect way to let in the fresh air whilst perching on the sill, watching the world go by.

As beautiful as they are, however, traditional timber sash windows can require a lot of maintenance and may not keep your home quite as snug as you’d like.

The Kömmerling window system combines the traditional features of timber sash windows, with the benefits and conveniences of uPVC. A global pioneer in uPVC window technology, Kömmerling’s advanced engineering delivers a sash window that meets the demands of modern living, with a beautiful, heritage aesthetic.

Whether you’re looking to add a touch of period style to your property, or you wish to faithfully replicate your existing sash windows, Kömmerling sash windows are unmatched in authenticity, functionality, finish and style.

There are lots of details to consider when replacing your windows, whatever the age and heritage of your home. We’ll help you every step of the way, ensuring your new windows are considered and complementary to the architectural style of your home.

veka sliding sash windows installed in a dining room

Traditional features

The Kömmerling sash window features a fully sculptured outer frame, heritage sashes with authentic sash horns, and slim sight lines for maximum light. A unique tilt facility allows inward opening for easier cleaning, and it’s available double or triple glazed, with foil laminate finishes for an authentic period look.

sliding sash windows installed in a modern woodnen kitchen

Energy-efficient

The Kömmerling system comfortably meets current building regulations, achieving an A-Rating with an exceptional U-Value of 1.2W/(m2.K). In short, this means a warmer, more comfortable home and lower energy bills, whilst enjoying the traditional window aesthetic.

VEKA Windows in a bedroom

Modern performance

The Kömmerling sash window is rigorously tested for weather performance and strength, achieving an ‘A’ Window Energy Rating (WER) as standard. It features multipoint locking with industry-leading hardware exceeding British security standards, and is PAS 24 security accredited.


Traditional windows meet modern technology

We believe that when it comes to modern sash windows, the Kommerling system is unrivalled in quality, technological innovation and design.

Veka sliding sash window in beautiful interior

Authentic, to the last detail

The Kömmerling system has been purpose-designed to accommodate high-security hardware, tested to exceed British security standards.

The outside of Kömmerling sash windows can be cleaned from the inside, simply by tilting the window inwards via secure sliding latches.

For even more peace of mind, the Kömmerling system can also meet the highest security standard of PAS 24.

Veka sliding sash window detail

Convenience and safety

The Veka system has been purpose-designed to accommodate ERA and Caldwell hardware, each being UKAS tested and found to exceed British security standards.

The outside of Veka sash windows can be cleaned from the inside, simply by tilting the window inwards via secure sliding latches.

For even more peace of mind, the Veka system can also meet the highest security standard of PAS 24. 

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areas we serve

stockport | manchester | cheshire | wilmslow | alderley edge | high peak | oldham | salford | tameside | trafford | rochdale | bury | bolton


finance

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Alexander Windows Limited is registered with Companies House at Unit 42a Newby Road Industrial Estate, Newby Road, Hazel Grove, Stockport SK7 5DA. In England & Wales. Company number 02599172. Alexander Windows Limited is authorised and regulated by the Financial Conduct Authority FRN 1037109. We act as a credit broker not a lender and offer finance from a panel of lenders.