Our letter boxes are specifically engineered for modern door systems, fitting door thicknesses from 20mm to 80mm with telescopic sleeves ensuring perfect installation. Whether you have uPVC, composite, or traditional timber doors, our collection includes 10-inch and 12-inch options with dimensions to accommodate C4 envelopes and larger mail items while maintaining security and weather protection.
Features and Benefits
- ✅ Anti-theft security features including anti-fishing technology and brush seals to prevent mail theft and unauthorised access
- ✅ Weathersealed construction providing draught exclusion and energy efficiency improvements
- ✅ Fire safety compliance with anti-arson designs and Secured by Design certifications for enhanced home protection
- ✅ Universal door compatibility with adjustable telescopic sleeves fitting 20-80mm door thickness ranges
Dimensions and Sizing Guide
Choose from 10-inch letter boxes ideal for standard mail and smaller spaces, or 12-inch models for larger mail items and C4 envelopes. All units accommodate door thicknesses from 20mm to 80mm using our telescopic sleeve system.
Trusted Security Brands
We stock premium letter boxes from industry-leading manufacturers including Yale (renowned for security innovation), Doormaster (specialist door hardware), Avocet (high-security solutions), plus Greenteq, Trojan, UAP, Mila, and Fab & Fix. These brands meet BS EN 13724:2002 compliance standards and many feature TS008:2012 security certifications, ensuring you receive professional grade protection with manufacturer warranties and ongoing technical support.
Always measure your door thickness and existing aperture before ordering. Professional installation is recommended for fire-rated doors or complex security applications.
Frequently Asked Questions
Q: Will this letter box fit my uPVC door?
A: Yes, our letter boxes accommodate all door types including uPVC, composite, and timber doors with thicknesses from 20mm to 80mm using the adjustable telescopic sleeve system.
Q: How do I measure for the correct size letter box?
A: Measure your existing aperture width / height and door thickness.
Q: Do these letter boxes prevent mail theft?
A: Yes, our security models feature anti-fishing technology, internal covers, and brush seals to prevent unauthorised access while the weather sealing system protects against tampering and environmental intrusion.
Q: Are these suitable for fire doors?
A: Selected models meet fire safety requirements with anti-arson features and appropriate certifications. Check individual product specifications or contact our team for fire door compatibility guidance.
Professional Installation Support
Our technical support team provides installation guidance, and we can recommend certified installers in your area for complex applications including fire doors, security doors, and listed building requirements. All installations should comply with building regulations and manufacturer specifications for optimal performance and warranty coverage.
