Why Choose Sliding Sash Windows from MLI?

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Energy efficient

Increased energy efficiency, meaning lower energy bills and a warmer home.

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Highly-secure

Increased security and protection against intruders.

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Sound investment

Better soundproofing, helping keep out unwanted noise.

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Sliding Sash Window Styles and Configurations

Sliding sash windows are a classic choice for properties where traditional style is important. The vertical sliding design gives the appearance of period timber windows, while offering the performance and ease of maintenance of modern uPVC.

They can be supplied as single windows, paired designs or larger arrangements to suit different openings. Each window is made to measure, helping achieve the right balance of style, ventilation and practicality.

We supply sliding sash windows in a wide choice of colours, finishes and woodgrain effects, giving tradespeople and homeowners across Worthing and West Sussex a timeless option for both period-style and modern homes.

Explore the range of stylish and durable frame colour options below to complement your design.

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Contact our professional and knowledgeable team and we'll help you find the right supplies.

Modern Security on a Traditional Window

Modern Security on a Traditional Window

Our sliding sash windows combine the classic look of traditional timber sash windows with the security benefits of modern uPVC. Each window is designed with strong frames, secure locking systems and reliable hardware to help protect the property without compromising on style. This makes them a practical choice for homeowners who want the character of a period-style window, along with the reassurance of improved security, durability and everyday performance.

Advanced Draught-Proofing and Brush Seals

Advanced Draught-Proofing and Brush Seals

Older timber sash windows were well known for letting in draughts, but modern sliding sash windows solve that problem. Discreet brush seals run along the sliding edges of the sashes, closing the small gaps that let cold air in and warm air out. The result is a window that keeps its traditional charm while feeling far warmer and more comfortable through the colder months.

Better sealing also means lower heat loss, which can help reduce energy bills and cut down on rattling and noise. We supply sliding sash windows made to your exact measurements, giving homeowners and tradespeople across Worthing and West Sussex the period look they want with the everyday comfort of a modern, draught-proofed window.

Tilt-In Sashes for Easy, Safe Cleaning

Tilt-In Sashes for Easy, Safe Cleaning

Modern sliding sash windows are designed with a tilt-in function that allows both sashes to swing inward, so you can clean the inside and outside of the glass from within the home. This is especially useful for upstairs windows, removing the need to lean out or use ladders. It is a practical feature that combines traditional sash styling with genuine everyday convenience.

Quality Sliding Sash Windows Supplied

Quality Sliding Sash Windows Supplied

Sliding sash windows are a timeless window style featuring one or two movable sashes that slide vertically within the frame. Popular in Georgian, Victorian and Edwardian architecture, they bring traditional charm to both period and modern homes while now offering the benefits of modern materials and engineering.

 

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Contact us today to discuss your requirements

Get in touch with our team today and let us help you find the best supplies for your project.

    Areas we serve

    We supply quality double glazing products for both homeowners and tradespeople across Worthing, Brighton, Hove, Bognor Regis and the wider West Sussex area.

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    Sliding Sash Windows FAQs

    Yes – they combine classic character with modern performance and easy ventilation. For sliding sash windows, the best choice usually depends on the property style, opening size, frame finish, glazing specification, security requirements and the level of maintenance the customer wants. It is also worth thinking about how the window will be used day to day, especially for ventilation, cleaning access, weather protection and long-term energy performance. Choosing the right specification upfront helps the finished job look better, perform properly and avoid unnecessary product issues later.

    A window with panels (sashes) that slide vertically, traditional to period UK homes. For sliding sash windows, the best choice usually depends on the property style, opening size, frame finish, glazing specification, security requirements and the level of maintenance the customer wants. It is also worth thinking about how the window will be used day to day, especially for ventilation, cleaning access, weather protection and long-term energy performance. Choosing the right specification upfront helps the finished job look better, perform properly and avoid unnecessary product issues later.

    Typically two stacked panels within a tall frame, often with astragal bars. For sliding sash windows, the best choice usually depends on the property style, opening size, frame finish, glazing specification, security requirements and the level of maintenance the customer wants. It is also worth thinking about how the window will be used day to day, especially for ventilation, cleaning access, weather protection and long-term energy performance. Choosing the right specification upfront helps the finished job look better, perform properly and avoid unnecessary product issues later.

    Older timber versions could stick or rattle, but modern uPVC and aluminium versions glide smoothly. For sliding sash windows, the best choice usually depends on the property style, opening size, frame finish, glazing specification, security requirements and the level of maintenance the customer wants. It is also worth thinking about how the window will be used day to day, especially for ventilation, cleaning access, weather protection and long-term energy performance. Choosing the right specification upfront helps the finished job look better, perform properly and avoid unnecessary product issues later.

    Balanced spring or weight mechanisms let sashes slide up and down and hold position securely. For sliding sash windows, the best choice usually depends on the property style, opening size, frame finish, glazing specification, security requirements and the level of maintenance the customer wants. It is also worth thinking about how the window will be used day to day, especially for ventilation, cleaning access, weather protection and long-term energy performance. Choosing the right specification upfront helps the finished job look better, perform properly and avoid unnecessary product issues later.

    MLI Building Products LTD place picture
    4.6
    Based on 15 reviews
    Peter Hughes profile picture
    Peter Hughes
    2 years ago
    Davyd Oddy profile picture
    Davyd Oddy
    3 years ago
    Great service and products from super friendly staff.
    Specials thanks to Loretta and Stephen
    Stephen Gale profile picture
    Stephen Gale
    4 years ago
    Great service good bunch lads
    Response from the owner
    4 years ago
    Thanks Steve.
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    4 years ago
    Kimberleyjanep profile picture
    Kimberleyjanep
    4 years ago
    So helpful - Steve was so patient while I chose my new front door - which was installed by PBM Exteriors who recommended MLI. I cannot emphasise how much my new and very contemporary front door makes the house look so modern and 'new'. Just huge thanks for great service and an amazing grey anthracite grey front door and side panels!
    Photo from customer review
    Response from the owner
    4 years ago
    You were very welcome Kim. It was our pleasure.
    Elliott Prior profile picture
    Elliott Prior
    5 years ago
    Response from the owner
    5 years ago
    Thank you Elliott
    Richard Jones profile picture
    Richard Jones
    5 years ago
    Great people to do business with!
    Response from the owner
    5 years ago
    Thank you Richard.
    So pleased I found MLI to supply the windows and doors for my property renovation, Excellent Prices, far more competitive than any other quote I had. Service from Steve & Loretta was amazing, nothing was too much trouble. Everyone compliments us on the fantastic windows. I highly recommend. Thank you so much
    Response from the owner
    6 years ago
    Hi Penelope. Thank you very much. 👍🏻
    Nigel Alderman profile picture
    Nigel Alderman
    7 years ago
    Friendly efficient service
    Response from the owner
    4 years ago
    Thank you Nigel.
    sohel isat profile picture
    sohel isat
    7 years ago
    Used to go there for delivery
    Response from the owner
    4 years ago
    Thank you Sohel.