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Guides
Locks and glass
Choosing a cylinder lock, measuring and fitting a new one yourself, and what laminated glass does in a composite door.
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The guides most people read first.
Best Euro Cylinder Locks 2026: Ultion vs Avocet vs Yale
Which euro cylinder lock to choose in 2026: Ultion, Avocet, Yale and Apecs compared on the 2024 ratings, guarantees and keys, by Rockdoor installers.
14 min read
How to Measure and Swap a Door Cylinder Lock
Measure, remove and fit a new euro cylinder yourself, step by step.
9 min read
Laminated Glass in Composite Doors
What laminated glass does in a composite door: security, noise and energy.
6 min read
More guides
1 more, newest first.
The Apecs AP v3 Cylinder Explained
Is the Apecs AP v3 any good? The cylinder Rockdoor now fit: how it's built, how it resists attack, what its ratings mean, and its keys.
11 min read
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