Certass – Local Authority Building Control

Certass Registered Installer

DGL is a fully Certass‑registered installer, giving homeowners complete confidence that all our window and door installations meet the latest industry standards for safety, performance and workmanship.

As a family‑run business, we take pride in doing things properly — and being Certass registered is an important part of that commitment.

What Certass Registration Means for You

Certass is a government‑authorised certification body for the glazing industry. Their role is to ensure that installers meet strict standards for:

• Competence

• Product quality

• Building Regulations compliance

• Professional conduct

When you choose a Certass‑registered installer like DGL, you know your installation is being carried out by a team who meet these high standards.

Building Regulations Compliance

All replacement windows and doors must comply with current Building Regulations. As Certass members, we can self‑certify our installations — meaning:

• You don’t need to contact Building Control

• You don’t need to arrange inspections

• You automatically receive a Building Regulations Compliance Certificate after installation

This certificate is important if you ever sell your home, as it proves the work was carried out legally and to the correct standard.

Independent Quality Assurance

Certass regularly assesses its members to ensure ongoing quality and compliance. This includes checks on:

• Installation standards

• Product suitability

• Customer service

• Professional conduct

For you, it means peace of mind knowing your installation is carried out by a trusted, independently assessed installer.

A Family Team You Can Trust

Because every member of our team is family, you always know exactly who is working in your home. And with our Certass registration, you also know the work meets the highest industry standards.

It’s the best of both worlds: personal, friendly service — backed by professional accreditation.

Your Certificate

Once your installation is complete, you’ll receive:

• A Certass Building Regulations Compliance Certificate

• Confirmation that your installation meets all legal requirements

• Documentation you may need for future home sales

Why Homeowners Choose a Certass Installer

• Guaranteed compliance with Building Regulations

• Independent assessment of installer competence

• Professional standards you can rely on

• Peace of mind for future home sales

• Trusted, accredited workmanship

Talk to Us About Your Project

If you’d like to know more about our Certass registration or how it protects your installation, we’re always happy to help.

Contact Us to speak to a member of our family team.