Timber-look
uPVC Flush Casement Windows
- uPVC Flush Fitting Profile from Deceuninck
- U-value as low as 1.0
- Matching Doors Available
- Suitable for New-builds and Refurb
- 10-Year Manufacturing Guarantee
Flush sash windows also known as flush casement windows, are a type of window where the sash (the opening part) sits flush within the frame, creating a smooth, flat surface on the external side. Originally, the flush window style was made of timber and joined by hand, which provided a clean and elegant look that complemented the proportionate architecture of the Georgian and Victorian era.
The classy, timeless flush design has seen a resurgence in recent years and with advancements in uPVC technology, flush sash windows are the perfect combination between traditional aesthetics, improved energy efficiency, and low maintenance.
uPVC Flush Casement Windows
External Flush Contours
Our flush casement windows replicate the traditional timber look with sashes that sit flush within the frame, making them ideal for both modern and heritage homes. The external flush contours mimic the appearance of traditional timber windows, perfect for maintaining the character of heritage homes such as traditional cottages.
Internal Frame Detail
The internal side of our flush sash windows features a minimalistic uPVC frame that can complement virtually any interior design. The sleek interior frame detail creates a seamless transition between the window and your interior décor. Only the external side of the flush windows sits flush within the frame. The internal side resembles the internal side of our classic uPVC casement windows.
Corner Welds
Our standard welding technique guarantees tightly bonded corners, resulting in a seamless and robust connection. The 45° corner welds undergo thorough cleaning with advanced machinery to achieve a pristine finish on the frame.
Astragal Bars
Our astragal bars are fixed on the glass surface with back-to-back spacer bars inside the glass unit. Available on double glazing, they can be configured horizontally or vertically to suit various architectural styles such as Victorian windows. Historically, these bars divided larger panes into smaller sections, echoing traditional window designs.
Multi-point Locking Mechanism
For enhanced security, our uPVC flush sash windows are fitted with a multi-point locking mechanism. This system ensures multiple locking points engage simultaneously, distributing the locking force evenly across the frame for added security and peace of mind.
Friction Stay
A friction stay is a key component used in windows to provide smooth, controlled opening and closing. Unlike traditional hinges, friction hinges allow these windows to stay open at various angles without the need for additional support or a mechanical stay. Additionally, egress hinges are available, which not only enhance the functionality of the window by allowing it to open fully for easy cleaning but also provide an escape route in case of emergencies – limitations may apply.
Trickle Vent
In line with 2022 Building Regulations, our flush sash windows include trickle vents fitted into the head of the sash to provide airflow even when the windows are closed. These vents, which are colour-matched to your chosen window finish, come in two sizes: 2500EA and 5000EA.
Sill Options
Our uPVC flush windows come with a variety of sill options to meet the functional needs of the window opening.
Choose between: No sill / 95mm / 150mm / 180mm
Colour Options
Smooth White
Smooth White
External White Grain
Smooth White
External 
Internal White Grain
White Grain
External Cream Grain
Smooth White
External 
Internal Cream Grain
Cream Grain
Internal Agate Grey
Heritage White
Chartwell Green
Smooth White
Chartwell Green
Chartwell Green
External Irish Oak
Smooth White
External 
Internal Irish Oak
Irish Oak
External Golden Oak
Smooth White
External 
Internal Golden Oak
Golden Oak
External Rosewood
Smooth White
External 
Internal Rosewood
Rosewood
External Anthracite Grain
Smooth White
External 
Internal Anthracite Grain
Anthracite Grain
External Black Grain
Smooth White
External 
Internal Black Grain
Black Grain
External 
Internal Black Grain
Heritage White
External 
Internal Smooth Anthracite
Smooth Anthracite
External 
Internal Smooth Anthracite
Heritage White
Basalt Grey
RAL 7012
Pebble
RAL 7032
Beige
RAL 1001
Stone
RAL 7030
Oyster White
RAL 1013
Papyrus
RAL 9018
Pale Green
RAL 6021
Reed Green
RAL 6013
Hardware Options
Discover the perfect handles for your uPVC flush sash windows. Choose between the classic in-line handle available in a whole palette of finishes or go with the classic monkey tail or rounded tear drop handle for traditional charm. You also have the option to add peg stays for yet another level of authenticity.
Inline Handle
Tear Drop Handle
Monkey Tail Handle
Tear Drop Peg Stay
Monkey Tail Peg Stay
White
Satin Silver
Brushed Chrome
Gold
Chrome
Bronze
Anthracite Grey
Black
Antique Black
Antique Black
Chrome
Chrome
Antique Black
Chrome
Antique Black
Antique Black
Chrome
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Glazing Options
Double Glazing
Our flush sash windows feature 28mm double glazing with argon gas inserted within the glazed pocket, keeping more warmth inside the home. The glass consists of a 4mm layer of clear Low E glass which helps to improve the thermal efficiency of our windows by reducing the amount of heat that can pass through the glass while still allowing light to enter.
Triple Glazing
Upgrade your flush windows with our triple glazing option, featuring three panes of glass with argon gas sealed between each of the two pockets. Triple glazing works similarly to double glazing but provides an additional insulation barrier. The extra pane of glass in triple glazing significantly improves the insulation values, making it ideal for climates where temperatures can drop below freezing.
Spacer Bars
Spacer bars are placed around the perimeter of the glazed unit in our uPVC flush sash windows. They provide crucial structural support and ensure consistent spacing between the panes. You can select from three bar colours to match your window’s aesthetic.
Preview finishes
Laminated Glass
Our glass upgrades include laminated glass for enhanced safety. Laminated glass remains intact if broken, reducing the risk of injury from sharp pieces. Laminated glass is often used in doors and windows installed in areas where the glass could be subject to impact.
Obscure Glass
Satin (Level 5)
Stipple (Level 4)
Westminster (Level 2)
Bark (Level 5)
Contour (Level 3)
Leaf (Level 3)
Venetian Integral Blinds
For added convenience and style, consider Venetian integral blinds, integrated within the double-glazed unit. These blinds offer privacy and light control, available in 10 different colours to complement your window’s frame finish. Please note that the operational device will always be positioned on the right-hand side (viewed internally).
| Name | Solar Reflection | Light Reflection | Solar Absorbtion | |
|---|---|---|---|---|
S102 White | Solar Reflection: 70% | Light Reflection: 78% | Solar Absorbtion: 30% | |
S106 Yellow | Solar Reflection: 62% | Light Reflection: 72% | Solar Absorbtion: 38% | |
S125 Beige | Solar Reflection: 57% | Light Reflection: 63% | Solar Absorbtion: 43% | |
S130 Green | Solar Reflection: 58% | Light Reflection: 65% | Solar Absorbtion: 42% | |
S142 Light Blue | Solar Reflection: 65% | Light Reflection: 69% | Solar Absorbtion: 35% | |
S149 Cream | Solar Reflection: 68% | Light Reflection: 75% | Solar Absorbtion: 32% | |
S155 Grey | Solar Reflection: 42% | Light Reflection: 48% | Solar Absorbtion: 59% | |
S156 Metallic Silver | Solar Reflection: 65% | Light Reflection: 62% | Solar Absorbtion: 35% | |
S157 Silver | Solar Reflection: 43% | Light Reflection: 44% | Solar Absorbtion: 57% | |
S159 Anthracite | Solar Reflection: 12% | Light Reflection: 13% | Solar Absorbtion: 88% | |
B160 Black | Solar Reflection: 4% | Light Reflection: 4% | Solar Absorbtion: 96% |
| Performance | Value |
|---|---|
| Best U-Value (Double Glazing) | 1.4 W/m²K |
| Best U-Value (Triple Glazing) | 1.0 W/m²K |
| Best Energy Rating | A |
| Air Tightness | Class 4 |
| Water Tightness | Class E900 |
| Wind Load | Class A4 |
| PAS 24 Security Upgrade | Yes |
| Side Hung Max Sizes | W: 700mm | H: 1310mm |
| Top Hung Max Sizes | W: 1200mm | H: 1160mm |
Weatherproofing
Our heritage flush casement windows demonstrate every aspect of innovation, making them a front runner in both performance and style. To keep out the wind and rain we use high performing and multifunctional weather seals. The seal helps to maintain consistent comfort. These windows have been rigorously weather-tested to help maintain consistent comfort that provide reliable protection season after season.
Thermal Efficiency
Our flush fitting windows are designed with exceptional thermal efficiency in mind, capable of achieving U-values as low as 1.0. This high level of insulation helps reduce heat loss, which can make homes more energy-efficient and comfortable year-round. The uPVC frame is multichambered, providing additional thermal performance by trapping pockets of air to prevent heat transfer.
Security
Our flush casement window systems have been designed to help keep the home safe and secure. Safety is at the top of most homeowners’ lists, which is why security is an integral built-in feature of our flush casement windows. All our windows come with multi point locking systems as standard and for added peace of mind, ask about our enhanced PAS 24 security upgrade.
Manufacturing Guarantee
With all Quickslide uPVC flush casement windows, we offer a comprehensive manufacturing guarantee of up to ten years as standard depending on product component. Wherever you are based in relation to us in West Yorkshire, you can offer homeowners complete peace of mind, knowing their investment is protected for longer.
Versatile Window Configurations
Small
Medium
Large
New Build Applications
Flush fit windows deliver excellent U-values to comply with building regulations for energy performance.
Designed with robust locking systems, our flush sash windows meet PAS 24 standards, offering enhanced security. Ask about our security features.
Choose from a variety of colours, styles, and configurations to suit the design of any property.
We understand the pressure of new build projects and offer quick, reliable delivery to keep your projects on track, and within budget!
With years of experience in supplying windows for new builds, we’re well-versed in meeting the homebuilder’s unique requirements. See our Case Studies for more.
In-House Manufactured Windows
Here at Quickslide, the flush casement windows we supply are made to order, in-house. We take pride in our commitment to quality and by choosing Quickslide for your uPVC flush casement needs, you’re choosing windows crafted with care by a dedicated team of experts. We offer a complete range of flush windows and doors that can be fully customised allowing you to tailor every detail of the product specification such a colour, glazing and handles to suit your specific requirements.
Flush Casement Window Materials
The flush casement windows we manufacture, and supply are made using Deceuninck’s Heritage uPVC profile. This excellent window system comes with unrivalled benefits across the board with superb energy performance, security, and durability. uPVC windows, in general, are low maintenance and can reduce energy and heating costs, and our flush sash windows are no exclusion to that. Choose Quickslide for superior PVCu flush sash windows that deliver on both style and performance, backed by industry-leading materials from Deceuninck.
Flush Casement Window Designs
Flush casement windows are distinguished by sashes that close into the frame and finish flush with the face of the window. As a result, they make for excellent timber replicas and can even replace the sleek design of aluminium. Flush casement windows from Quickslide are available in a variety of configurations to suit the specific needs of any living space. Whether you prefer top openers, side openers, or double opener designs, our flush sash windows can be customised to meet your requirements.
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FAQs
View All FAQsDo you offer flush Georgian windows?
Our flush sash windows are available with astragal bars to match Georgian windows. We make all our flush sash windows in-house and the homeowner, therefore, has the flexibility of choosing their own bar layout to recreate a window design from their chosen era.
Are flush fit windows considered heritage windows?
Heritage – or traditionally styled windows – are growing in demand, in particular the flush sash. It is fair to say that they have invigorated the replacement window market, where just a few years ago the choice for most homeowners replacing their windows was standard casements. Flush sash windows sit alongside our sliding sash windows offering true heritage window designs.
Are flush windows more expensive?
The flush sash window style is a premium offering and therefore generally, the flush sash style is slightly more expensive than classic casement windows.
Will uPVC casement windows reduce the noise levels from outside?
If you are replacing your single glazed windows with new casement windows from Quickslide, the homeowner will likely see a noticeable reduction in noise pollution. With the extra layer of glass found in the double glazed unit, less sound will be able to filter in.
What is the lead time for your flush casement windows?
Our flush casement windows are available on the following lead times
| Colour | Lead Time |
|---|---|
| Stock Finishes | 04/11/2024 |
| Woodgrains Group 2 | 11/11/2024 |
| Woodgrains Group 3 | 11/11/2024 |
| Woodgrains Group 4 | 25/11/2024 |
| Bespoke Colour | +3 Weeks |
Can Quickslide deliver flush sash windows for new build homes?
Yes, we regularly supply uPVC windows for multi-plot developments and flush windows are becoming increasingly popular. With reliable lead times and large-scale manufacturing capability, we’re well equipped to support residential sites of all sizes. And if you need support with the installation for your developments, we can help with this.
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