At GL Glazing & Window Services Ltd, we recently completed a full window upgrade for a homeowner in Oldbury, Birmingham. The project included two major installations: a modern casement REHAU white on white window on the first floor, and a full bay window replacement on the ground floor.
This upgrade wasn’t just about looks. It brought significant improvements to insulation, home security, and kerb appeal. In short, it made a real difference to the comfort and value of the property.
The Problem: Aged Windows and Energy Loss

Before we started the installation, the upper-floor window had been removed. This exposed the interior to outdoor conditions, leaving the room vulnerable to heat loss, damp, and unwanted noise. It also made the property feel incomplete from the outside.
The ground-floor bay window was still in place but clearly outdated. It had single-glazed panels that offered poor thermal performance. The window frames were also tired-looking and no longer matched modern energy efficiency standards. Because of these issues, the property was using more energy to stay warm, which meant higher heating costs.
The Solution: Sleek, Secure, and Energy-Efficient Installations

Our team installed a brand-new casement REHAU white on white window upstairs. This model is one of the most popular among homeowners seeking performance and elegance. The white-on-white design delivers a clean, modern appearance both inside and out. It blends seamlessly with brickwork and complements the overall style of traditional or contemporary homes.
We then turned our attention to the ground floor. Here, we replaced the outdated bay window with a modern A-rated double-glazed uPVC bay window. The installation was precise and perfectly matched to the existing opening. Once in place, it immediately improved the appearance of the home and helped lock in heat, making the living area more comfortable.
Together, these new windows completely revitalised the property. Not only does the home now look more modern and tidy, but it also performs better in terms of thermal efficiency and noise reduction.
Why Choose REHAU Casement Windows?
We recommended the REHAU casement white on white system for this project due to its proven performance and stylish design.
Here’s why our clients love it:
Energy Efficient – A-rated insulation helps reduce heating bills
Low Maintenance – uPVC frames that never need painting
Dual-White Finish – clean and cohesive inside and out
Durable & Secure – built with long-lasting strength and safety in mind
Whether you’re replacing one window or upgrading your entire property, REHAU systems offer reliability and comfort that last for years.
Why Trust GL Glazing?
With years of experience, GL Glazing & Window Services Ltd has become a trusted name for window installations in Oldbury, Smethwick, Birmingham, and across the West Midlands. We are known for delivering tailored solutions, honest quotes, and quality workmanship.
We offer:
Free, no-obligation quotes
Skilled and qualified installers
Use of trusted brands like REHAU
Friendly and responsive customer service
Clean, respectful work on every property
Our team handles every detail with care—from initial consultation to aftercare. That’s why so many homeowners recommend us to friends and family.
This bay window replacement in Oldbury and the REHAU white on white casement installation upstairs show how strategic upgrades can transform a home, inside and out. The project not only gave the property a fresh, modern look, but it also boosted comfort, energy efficiency, and long-term value.
If you’re considering replacing your windows, our team is here to help. Whether you’re after a single casement window or a full set of double-glazed replacements, we’ll provide expert guidance and deliver excellent results every time.