Security Features to Look for in Bi-Fold Doors & Exterior Doors
Why security matters when choosing doors and bi-folds
When you invest in Doors & Bi-Folds Installation in London, you’re doing more than simply altering the look of your home. You’re enhancing its value, its functionality—and crucially, its resilience against intruders. Poor installation or cheap hardware can leave gaps that undermine even premium materials. That’s why selecting robust security elements from the outset is vital.
Key security features to look for
Multi-point locking systems
A single deadbolt isn’t enough these days. For both exterior doors and bi-folds, a multi-point lock—engaging several locking points along the frame when you turn the key—is best practice. This distributes force and reduces the chance of a door being forced‐open. Many specialist systems document these capabilities. For example, aluminium door systems often include auto-mechanical locks with push-back hooks that engage automatically and strengthen the frame against forced entry.
Strong frame and durable material
Even the best lock is only as good as the surrounding material. The frame must resist bending or lever attacks. If you're looking at bifold doors, ensure the panel frames and tracks are heavy duty, and the threshold low but reinforced. Many UK installers emphasise secure hardware and internal glazing to resist tampering.
Internally glazed units / jewellery-pin protection
Glass panels are a weak point if exposed to external tampering. Good installers use internal beading (so it cannot be removed from the outside) and forged or concealed locks. In bi-fold systems especially, anti-jemmy pins or security bolts within the frame prevent the panels being prised apart.
Secured by Design / PAS24 certified hardware
In the UK, certification matters. Look for doors that meet or exceed standards such as PAS24 (a national standard for burglar resistance), or that are part of the Secured by Design scheme. These ensure independent testing of locks, hinges, frames and glazing.
Reinforced hinges & anti-lift protection
Especially with bi-fold doors, panels on sliding or folding tracks can be vulnerable. Reinforced hinges plus anti-lift devices (which prevent panels from being raised off their tracks) are an important safeguard. In sliding/folding systems specified for quality builds, hardware designed to resist this kind of attack is clearly referenced.
High-quality threshold and weather seals + hidden fixings
Security isn’t just about resisting intrusion—it’s also about weatherproofing and durability. A door that warps or allows moisture ingress will degrade quickly, making it easier to breach. Ensure the threshold is robust and fixings are hidden or tamper-resistant. Some extended systems highlight “compressed lever locking for ultimate security and airtightness”.
How to assess your installer and product quality
Even the best door with the top specs can fail if the installation is poor. Here’s a quick checklist to select an installer like All Window Services:
✅ Ask for evidence of certification (FENSA / CPC / Secured by Design).
✅ Check that the installer uses their own staff (rather than sub-contractors) to keep quality consistent. On their site, AWS say: “Our team is comprised of 12 dedicated professionals, most of whom have been with AWS for over a decade.”
✅ Ensure your quote includes labour, product, warranty and after-care—look out for comprehensive warranties on both product and installation. On their Doors & Bi-Folds page, AWS mentions “comprehensive warranty … giving you peace of mind”.
✅ Confirm that the door/bi-fold is fitted according to manufacturer specification, with proper aligning, sealing, and anchoring.
✅ Check reviews or case studies—look for mention of product longevity, security performance, return servicing.
Which security features make the most difference?
If you were to prioritise three features that deliver the most value for money and safety, these would be:
Multi-point locking combined with high-grade hinges and anti-lift.
Internal glazing or internal beading, to reduce risk of panels being removed from the outside.
Certified hardware/frame (PAS24 / Secured by Design), so you know the whole system—not just individual components—is tested and approved.
Focusing on these will make a far greater difference to your security than aesthetic features like colour or large glass panes (although those matter too, especially for light and style).
Don’t forget the after-care and maintenance
Even the best doors need some care. Here’s how to keep your security features functioning at their best:
Lubricate locking mechanisms and keep tracks (for bi-folds) free of debris.
Regularly check that weather seals and thresholds are intact—any warping or water ingress weakens structure.
Inspect hinge screws and fixings to ensure they are still tight.
If your door has external lights, sensors or a camera, ensure all electronics are functioning.
If choosing an installer like All Window Services, ask about their post-installation service: should anything require adjustment or servicing, you want a responsive team.
Feel confident knowing that your home is not only stylish but secure. With the right focus on quality materials, certified systems and expert installation, you’re investing in long-term peace of mind. If you’re in London or the South East and ready to take the next step, talk to a trusted specialist like All Window Services to explore your options and obtain a free, no-obligation quote.
Enjoy your home—and rest easy knowing it’s truly protected.
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