Overview
This article compares Evolution and Residence 9 heritage window brands, exploring their key differences in design, performance, and suitability for period properties to help homeowners choose the ideal timber-alternative solution.
The key befits over wooden windows:
- Low maintenance – Unlike timber, these windows won’t rot, warp, or require regular painting.
- Enhanced thermal efficiency – Modern materials and glazing options offer superior insulation compared to traditional wood.
When someone mentions ‘heritage windows’ you think of white painted wooden windows, perfectly joined, with period handles. But ‘heritage windows’ does not have to mean wood. In fact, timber alternative windows are made using efficient uPVC frames and designed to look like traditional wooden windows for a traditional look so you can’t tell the difference. It can be tricky to know how much replacing your timber alternative windows can cost but they are no longer a niche product and timber look uPVC is better than ever.

Why choose timber-effect windows?
Although timber is extremely attractive, homeowners often prefer timber look uPVC due to its low maintenance and flawless appearance. To maintain timber’s efficiency, it needs to be regularly maintained which can be time-consuming as well as expensive. uPVC is extremely easy to take care of and can be more cost-effective than timber.
Timber-look windows give you the best of both worlds – combining the beauty of timber with the ease and efficiency modern uPVC provides. Heritage timber alternative windows bring these elements together to give a superior performance that will add to the mix of overall kerbside appeal.
Our range of timber-effect windows
Heritage windows review – Which are the best?
There are two main brands of heritage uPVC windows we’re going to review – Residence 9 windows and Evolution Windows. While the Evolution range is the original, the Residence Collection is the better-known brand and its Residence 9 windows are seen as more ‘popular.’ But what is the real difference in performance between the two?

What are Residence 9 windows?
The Residence 9 Collection is one of the most well-known brands when it comes to heritage windows. They have recently expanded their range to enable them to replace modern uPVC windows as well as timber. The Residence Collection is 100mm deep which makes them a durable window and the glass is bonded to the frame which looks impressive. Residence 9’s flush sash exterior is timeless and this collection was designed to exactly replicate the elegance of traditional sash windows which is why they have larger frames. Residence 9 windows are A-rated as standard for energy efficiency to help you save money on your energy bills and you can choose from a vast colour palette.
How much do Residence 9 windows cost?
The price of your window renovation will depend on the size of the overall project. However, as with all our products, we only require a deposit of £99. When it comes to repayment, a range of flexible finance options are available, making Residence 9 windows accessible for all homeowners.
What are Evolution Windows?
Evolution produces timber-effect windows in both Stormproof and Flush designs. The Stormproof range has an overlapping sash, while Evolution Flush sits level with the outside of the frame. This makes the Flush range the closest comparison to Residence 9. Evolution offers timber-look joints, traditional internal detailing, decorative glazing and heritage hardware. Both brands therefore offer convincing alternatives to timber. For many homeowners, the deciding factors will be proportions, detailing and glazing performance.
What’s the difference between Residence 9 and Evolution Windows?
| Brand | Residence 9 windows | Evolution windows |
|---|---|---|
| Frame Depth | 100mm | 82mm |
| Energy Efficiency | A+ | A |
| Colours | 14 colours and woodgrain finish options | RAL colours and woodgrain finish options |
| Security | Multi-point shoot-bolt locking mechanisms | High quality locks |
| Period detailing | Exquisite detail and range of options | Exquisite detail and range of options |
| Timber look window cill | Yes | Yes |
| Flush casement | Yes | Yes |
| Glazing options | Double or triple glazing available | Double or triple glazing available |
| Authentic butt hinges | Yes | Yes |
| Accessories | Range of authentic forged handles including monkey tails and teardrops | Monkey tail and period curved handles, as well as more modern options such as the teardrop |
Can timber effect uPVC windows be used in UK conservation areas?
Getting replacement windows accepted in UK conservation areas is challenging as the main stipulation is that they must be in keeping with the original windows to preserve the heritage aesthetics of a property while improving its performance and often this means timber windows. The authentic style and attention to detail of Residence 9, such as its flush sash exterior, have won them praise as replacement windows from planning authorities across the UK and they are regularly approved for installation in these areas as traditional window replacements.
And they perform to the very highest standard thanks to profiting from all the benefits of uPVC, with modern design and safety features, thermally efficient, virtually maintenance free, and availability in a range of colours, including heritage colours and dual colours.
Our range of timber-effect windows
Which looks more like a traditional timber window?
Both brands offer features that help recreate timber joinery, including traditional hardware, woodgrain finishes and balanced sightlines.
Residence 9’s particular strength is its frame depth. Its 100mm frame closely mimics the chunky, authentic dimensions of 19th-century timber frames, compared with the 82mm depth listed in Evolution’s Storm and Flush technical comparison.
Combined with R9’s deep decorative interior, these proportions give the window a substantial appearance that can be especially appropriate when replacing original flush timber windows.
Evolution’s shallower profiles may appeal to customers who prefer a less substantial frame.
For homeowners prioritising the depth and presence of traditional timber joinery, however, Residence 9 has a clear advantage.
What are the best window styles for 19th Century properties?
Are you looking for the ideal way to bring your home back to its original Victorian or Queen Anne architectural stylings? Between 1839 and 1900, this era is considered a crucial time in Britain’s architectural history. The Industrial Revolution was taking place, where a series of architectural revival styles were taken from the past to create the asymmetrical ‘Victorian’ style that we see many examples of around Ipswich and the surrounding Suffolk areas today.
An elegant style to breathe life back into your Victorian home
Whether you’re looking for ‘Victorian Gothic’ timber glazed bars, beautiful heritage bay window restoration or classic timber effect window installations, we have a wide range of options to accommodate Victorian and Queen Anne revival style heritage window designs. Residence 9 windows have been designed as the perfect solution for period property installations, authentically replicating 19th Century timber windows and authentic designs, from Georgian and Victorian properties to stately homes. A weather bar ensures traditional performance and aesthetics while Georgian bars recreate the pattern of original timber windows to preserve a property’s character. Eye-catching monkey tail and pear drop handles provide the perfect finish. Residence 9 enables you to replace your windows without losing the character appearance and feel of the period. You can contact us to find out more.

Heritage Window FAQs: Evolution vs Residence 9
Yes, both brands are designed to meet the strict visual requirements of conservation areas and listed buildings, with flush sash profiles and traditional detailing that replicate authentic timber windows. However, permission is specific to the property and local authority. Approval should never be assumed.
Both offer timber-effect styling, traditional detailing and heritage hardware. Residence 9’s deeper frame gives it a particular advantage when recreating the substantial proportions of older flush timber windows.
Both offer excellent thermal performance, but Residence 9 windows typically achieve slightly higher energy ratings due to their 9-chambered frame system, making them ideal for improving home insulation.
No. SEHBAC now offers Residence 9 and Residence 7 within its heritage range. Our team can help you compare these options and choose a design suited to your home.
Residence 9 is a compelling choice when your priorities are substantial heritage proportions, a deep decorative interior and excellent insulation potential. Its 100mm frame and capacity for 44mm triple glazing are clear differences from Evolution’s 82mm frame and 32mm triple-glazing specifications. The chunkier frame also most closely echoes the look of timber.



















