ASSURE Certified Installer
ASSURE is a recognised certification and warranty framework within the UK window and door industry. It ensures that installations meet strict technical standards, comply with building regulations, and are carried out by trained, vetted professionals.
Membership Number: 1909
View Our Official ProfileKey elements of ASSURE include:
- Verified installer competence
- Compliance with industry standards and regulations
- Quality assurance checks
- Access to extended product warranties
- Consumer protection and dispute resolution mechanisms
Homeowner Leaflet
Benefits of ASSURE Certification
Choosing an ASSURE installer guarantees more than just a fitting—it guarantees excellence and long-term security.
For Homeowners
Peace of mind
Installations carried out by certified professionals who meet ASSURE’s strict criteria.
Higher standards
Ensures doors and windows perform as intended—security, energy efficiency, and durability.
Extended warranties
Many ASSURE-backed products come with enhanced or extended warranty options.
Regulation compliance
Be confident your installation meets all required building standards.
Better resale value
Certified installations add credibility and documentation for future property sales.
For Builders & Landlords
Consistent quality
Reliable installation standards across multiple properties.
Reduced callbacks
Fewer issues due to poor installation, saving time and money.
Ultimate compliance
Clear certification for audits, insurance, and regulatory checks.
Who Should Choose
an ASSURE Installer?
Property Owners
Upgrading security or energy efficiency.
Replacement Projects
People replacing old or failing windows and doors.
Professional Landlords
Needing compliant, documented installations.
Property Developers
Who require consistent, high-standard fitting across projects.
Quality Seekers
Anyone wanting long-term peace of mind and warranty-backed work.
If quality, compliance, and reliability matter, choosing an ASSURE Certified Installer is the safest route.
What This Means for
Top Lock
Becoming an ASSURE Certified Installer reinforces Top Lock’s position as a trusted, high-standard provider. It aligns perfectly with our brand values of transparency and craftsmanship.
This certification supports our long-term vision of building a multi-division brand known for reliability, innovation, and exceptional customer experience.
Installation Quality
Formal recognition of our technical fitting competence.
Backed Warranties
Direct access to ASSURE-backed consumer protection.
Trust Signals
Reinforcing credibility across our entire division map.
Market Edge
Positioning us as a premium leader in South Yorkshire.
Showroom Integrity
Adding a layer of verified proof for every visitor.
Verified Badge
2026 Certified
ASSURE Partner
Why Accreditations Matter to You
Guaranteed Security
Industry-led standards ensure every window and door installation is as secure as possible.
Long-term Value
Certified installations qualify for extended product warranties and protection schemes.
Compliant Entry
We handle the building regulations compliance, so you don't have to worry about the paperwork.
Work with the Best
Choose a certified installer for your next home improvement project.