Conveying the illusion of space and depth, tailored to your home.

If you’re looking for a feature piece, Bay and Bow windows will make a stunning addition to your home. They convey the illusion of space by enabling more light to enter your home.

Bay and Bow windows are comprised of three or more individual window units. Personalise your new windows with the wide range of colours, hardware and detail options available from ERG.

Grey UPVC Bay & Bow Windows

Every Bay and Bow window we proudly install are A+ rated, meaning that they are extremely energy efficient and are a great option if you are hoping to reduce your energy bills. As with every ERG window, you can be certain we have considered the safety aspects thoroughly; all Bay and Bow windows come with shoot-bolt locks, key locking handles and strengthened glass.

White UPVC Bay & Bow Windows
White UPVC Bay & Bow Windows


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Do your windows have EXTREME protection?

We are excited to give our customers access to our exclusive EXTREME collection, which combines up to 9 visible locking points, offering you 3 times more protection than a standard window.

  • EXTREME heightened security with centre VAULTBOLT and multi cam locking technology.
  • EXTREME heightened durability with UNIQUE superglide gearbox ensures smooth operation.
  • EXTREME heightened COMPRESSION and acoustics with interlocking hinge bolts and optimum weatherseals.
Casement Windows

Herculean Hinge

Heavy duty, highly engineered hinges that provide increased load bearing. With anti-crowbar technology and sustained use for a lifetime.

Extreme Locking

Up to 9-point locking system and two high compression hinge bolts to create 360-degree solidity. Also available with enhanced security option designed to meet the requirements of the police-recognised Secured by Design initiative.

Extreme Frame

Highly engineered frames, that encompass 14 chambers (combined sash and frame) to provide supreme thermal performance. Maximum protection against twist and ageing so your windows will look and operate like new for longer.

Extreme Weather Seal

Dual density and high elasticity for twice the standard coverage. Long lasting airtight protection from the elements and added noise reduction.

Ultimate Glass

High performance next generation glass for superb energy efficiency. Ultra-clear outer pane and a super soft coat inner pane. Improved clarity for the perfect view.

Extreme Handles

Our Extreme Handles come in a range of colours to suit your home. Built to last with robust materials and quality finishes.
ERG Scotland windows offer maximum energy savings...

ERG’s replacement windows can ensure you notice a drop in your energy bills, saving you money every month. Fortunately, heat loss will become a thing of the past due to our modern, thermally reinforced window profiles.

The Energy Saving Trust has acknowledged our EXTREME windows for their thermal qualities and eco-friendly performance.

White UPVC Windows
Oak Envisage Flush Windows
White UPVC Windows


When you have settled on the right window style for your home, you will need to think about personalising the window to your taste. We offer a vast selection of coloured finishes, glazing choices and hardware to get just the right look.

A huge assortment of colours...

It may take you a little while to settle on a finish for your new EXTREME windows as we have 100’s of shades, textures and wood effects available. You will have absolutely no difficulty finding a suitable finish with so many options on offer as our colour palette incorporates traditional and modern coloured finishes. Chartwell Green is just one of several vintage colours at ERG that is being chosen time and time again by our window buyers.

Glazing comes in many different forms…

The importance of the window frame is matched by the importance of the glazing used. If the main incentive is to reduce the cost of fuel bills you will be best choosing our high performance next generation glass. A quick conversation with one of our window consultants will help you get your glazing right.  Our privacy glass will give you that as it is frosted and will obscure what people looking in can see. It can be supplied double or triple glazed depending on what you would prefer.

Intricately crafted handles...

Our carefully crafted handles come in a series of stunning designs to enable you to make the window your own. Each has been expertly made by highly trained craftspeople and will make opening and closing your new windows effortlessly simple and forever pleasurable.

With a secure locking system built in, you can be confident that when you close your windows they are tightly fastened.


Every promise we make, we keep. Every time. Our promises are bold and are there to assure you that we’re completely confident in our products and our service.


At ERG we realise the importance of gaining trust and not expecting it. We believe this is achieved through hard work, honesty, transparency of our services and valuing our customers.

Ethos of ERG Scotland

Our teams adhere to a strict ethos which is to achieve only the highest standards of excellence at all times. We listen to our customer’s needs and tailor our services to meet all individual requirements.

20 Year Guarantee

ERG Scotland is proud to be Scotlands very first to offer a 20 Year Guarantee. Not only that, you will also be covered for both moving and non-moving parts. Our confidence in our products and dedication to our customers means we’ll be there for you well into the future.

Price Promise

Giving our customers complete confidence in the price that they pay is very important to us. So, if you, or any customer, can find the same product specification and service commitment cheaper elsewhere, within 14 days, we’ll refund the difference.