Best uPVC Door Locks for Maximum Security: Trade Picks

Best uPVC Door Locks for Maximum Security: Trade Picks

Why choosing the right upvc door lock matters

uPVC doors remain the most common external door type across the UK; they are lightweight, thermally efficient and cost effective. However, security depends on the locking system fitted: a poor-quality cylinder or a misaligned multipoint mechanism can make a door vulnerable even if frames and glass are strong. For homeowners and trade professionals, selecting the correct upvc door lock and installing it properly offers the best value for theft prevention and longterm performance.

Key security standards and features to look for

• TS007 3-star rating for euro cylinders: this is the current benchmark for anti-snap, anti-bump and anti-drill protection; choose 3-star cylinders for external doors.
• PAS 24 and Secured by Design: look for doors or systems that meet PAS 24 or are Secured by Design approved for whole-door security assurance.
• Multipoint locking: deadbolts and hooks that engage along the full height of the door improve resistance to lever attacks and racking; these are standard on uPVC front doors.
• Anti-snap cylinders and reinforced keeps: use anti-snap escutcheons and long security screws into the frame to prevent cylinder extraction and splintering of the frame.
• Material and finish: stainless steel faceplates and galvanised internal components resist corrosion and maintain smooth operation.

Trade picks: recommended upvc door lock components

Below are practical trade picks that combine recognised security with proven reliability. These recommendations suit most UK uPVC external doors.

• TS007 3-star anti-snap euro cylinder (example: Ultion or equivalent): essential for external doors; these cylinders protect against snapping, drilling and bumping. Fit with a matching anti-snap escutcheon and ensure cylinder length is measured correctly for the door.
• High-quality multipoint gearbox (Winkhaus/Fuhr/Avocet style): choose a robust gearbox with a 20mm or 22mm centre case and hardened hooks or deadbolts; gearboxes with positive lock indication make commissioning easier on site.
• Hook or roller shootbolt variants for French doors: hook bolts pull the door into the frame, reducing leverage; rollers suit rebated single doors where a smooth close is required.
• Security handle set with anti-drill and hardened spindle: upgrade to cylinder protection handles when replacing the cylinder to add protection against snap and drill attacks.
• Heavy-duty keeps and reinforced packers: use stainless steel keeps and fix with long, corrosion-resistant frame screws to transfer loads into the frame and not just the uPVC.

Practical trade advice for selection and ordering

• Measure accurately before ordering: for euro cylinders measure from the centre of the fixing screw to each end of the cylinder to determine the correct split length, for example 35/45; for multipoint systems note the centre case size and backset.
• Match components: ensure the cylinder profile matches the handle and gearbox; some gearboxes use a euro cam that must align with the cylinder cam position when fitted.
• Stock common sizes: keep common cylinder sizes, 35/35 and asymmetric sizes such as 30/40, and the most common centre cases in stock to reduce site delays.
• Use quality fixings: recommend 45–70mm long security screws into the frame, especially at the keeps, to improve pull-out resistance.

DIY guidance: replacing a euro cylinder and basic checks

Replacing a euro cylinder is a straightforward task for competent DIYers; it is also a frequent trade job. Follow these steps and use the correct tools.

• Tools needed: cross head screwdriver, replacement cylinder, key for the existing cylinder, and possibly a drill if screws are seized.
• Remove handles: undo handle spindle screws and remove handles to access the cylinder retaining screw at the edge of the door.
• Unscrew the retaining screw: this is located at the centre line of the cylinder. Insert the key, turn about 10–15 degrees to align the cam, and gently pull the cylinder while turning the key to release it.
• Fit new cylinder: slide the new cylinder into position with the key in place, align the cam, and tighten the retaining screw; refit handles and check operation by locking and unlocking several times.
• Common pitfalls: incorrect cylinder length will leave the cylinder projecting; a slight projection reduces security. If the cylinder feels stiff, check handle and gearbox alignment before forcing screws; lubricate with graphite powder only.

When to call a trade professional

Replace a cylinder yourself if it is a simple swap. Call a locksmith or installer when:

• the multipoint gearbox is faulty; replacement often requires door removal and precise adjustment;
• the frame is damaged or the door sags; corrective work may include hinge replacement, packers or realignment;
• the door has a complex multi-leaf arrangement or French doors needing coordinated shootbolt alignment;
• warranty or insurance requires certificated installation such as PAS 24 or SBD compliance.

Maintenance and ongoing checks

Regular maintenance keeps a upvc door lock performing well: lubricate the euro cylinder with dry graphite annually; check that multipoint hooks and deadbolts engage fully; tighten faceplate screws and replace any corroded fixings promptly. Test the lock with the door closed, paying attention to compression and handle travel; early adjustment of striker keeps can prevent premature gearbox wear.

Recommended Products

Based on this article, you may find these products helpful:

• TL Thumb Turn Euro Cylinder
• Ultion Plus TS007 3* Kitemarked Euro Key & Turn Cylinder
• Multipoint Gearbox GU Old Style
• In-Line Window Mechanism
• Offset Window Mechanism

Conclusion: next steps for homeowners and tradespeople

Choosing the right upvc door lock combines compliant cylinders, a robust multipoint gearbox and reinforced keeps. For homeowners, start by fitting a TS007 3-star cylinder and a security handle set; for tradespeople, stock trusted cylinder sizes, robust gearbox units and stainless keeps to offer immediate upgrades. If uncertain about gearbox replacement or frame repairs, book a certified locksmith or installer to ensure PAS 24 or Secured by Design requirements are met. For further technical reference and specification options see our pillar resource: /guides/door-locks.