Keswick Superglaze pvc patio doors have been designed with efficiency and security as their key drivers.

For efficiency, the pvc profile uses a chamber system which minimises heat loss whilst maintaining structural integrity. This along with the A rated glass means that the patio doors will make your home feel much warmer on those cold winter nights.

The rigid pvc structure has anti-lift/sash stabilising trim which increases security and assists in smooth location of lock into keep plate. These factors helped us be the first UK company to achieve the latest BBA accreditation for our in-line patio doors!


The Glass

After using the highest quality frames, we need glass to the same standard. From Durham, our manufacturer has been established for over 50 years. They are also constantly investing in new products meaning they are at the pinnacle of what is possible.

Check out the video below which shows how a new glass innovation can actually change opacity depending on the environment! This is possible due to an electric current passing through the glass.

Dynamic Solar Control Glass

Our benchmark starts at an A +, so there is not extra cost to upgrade. On all of our glass units* we use a warm spacer bar. This is a little bit more expensive than a standard aluminium one, however it is one of the biggest leaps forward in glass and glazing over the last few decades – it is approximately 1000 times better! You may have noticed a condensation patch around the edges of your window and this is partly due to that spacer bar transferring heat better than the glass. Our warm spacer bar will greatly improve this phenomenon.

We also tailor aspects of the glass further depending on what our customers want to get from their product.


– Is your furniture fading?

– Nearby road too noisy?

– Sun makes the room unbearably hot?

…We can offer glass which will mitigate all of these.


As an example, a standard double glazed unit will block out approximately 60% of UV rays, so 40% gets through and fades your carpets and furniture. We can install our ‘Armour Pane’ glass which stops 98% of these harmful rays!

We can also fit triple glazed units, however we feel that it is only in certain circumstances where the benefits of it would outweigh the drawbacks, double glazed units often out perform triple! Ask one of our salesman and they will be happy to discuss this as part of the quotation process.

* Unless the glass is to match existing windows