If you’ve been searching for a keyless entry solution that actually works with uPVC construction, you’re not alone. Plastic composite frames create unique challenges that standard timber hardware simply cannot address. This page ranks five mechanical combination models from Lockey Digital, each suited to different uPVC installations, and explains precisely why they fit. You’ll also find practical installation guidance, a comparison table, and answers to common questions about keypad security on composite entrances.
Top 5 Digital Locks for uPVC Doors
Choosing the right model depends on your specific setup. Some uPVC entrances use multipoint locking mechanisms with a gearbox and hooks, while others rely on simpler single-point configurations. The thickness of your frame, the backset measurement, and whether you need features like key override or hold-back functionality all influence the decision. Here are five Lockey Digital products ranked for this application, starting with the most versatile option.
1. Lockey 2835 Mortise Latch with Lever Handle
The Lockey 2835 is the strongest all-round choice for uPVC front entrances and back exits alike. It features a mortise latch bolt with an anti-thrust pin, reversible lever handles on both sides, a hold-back facility, and a free passage function that can be disconnected if you prefer permanent code-only access.
Why does this matter for plastic composite frames? The lever handle design is considerably easier to operate than a knob, which is worth considering if elderly family members or anyone with reduced grip strength uses the entrance regularly. Lever operation also provides enough contra-rotation to engage most uPVC multipoint gearboxes when paired with compatible hardware. The adjustable 60/70mm backset fits the majority of UK composite profiles, and you won’t need batteries, wiring, or any electronic components.
With the hold-back feature, you can prop the latch open during busy periods, such as when tradespeople are moving in and out, then re-engage the code requirement with a simple button press. The passage function works slightly differently; it keeps the latch engaged but removes the need to enter a code, so the entrance operates like a standard lever set until you disable it. The 14-button keypad offers over 7,000 possible code groups when using three to seven digits, and Teflon-coated internal parts significantly delay natural wear.
Satin chrome finish is recommended for external uPVC installations where weather exposure is a factor.
2. Lockey 2435KD with Key Bypass
For households that want a safety net alongside keyless convenience, the Lockey 2435KD adds a traditional key override cylinder to the standard mechanical keypad. It shares many core specifications with the 2835, including the mortise latch bolt, anti-thrust pin, hold-back facility, and adjustable 60/70mm backset with a 12mm throw.
Where it differs, and where it earns its place on this list, is that key bypass feature. If someone forgets the combination, or if you manage multiple entrances with different codes, a physical override means you’re never truly stuck. Landlords and property managers often favour this model for uPVC properties on rent because tenants change frequently, and having a master key alongside changeable entry codes simplifies transitions between occupants.
Three variants exist: KD (keyed differently), KA (keyed alike), and KM (keyed to master). The KA option lets you use a single key across several installations throughout a building, which reduces the number of spares you need to manage. Teflon-coated parts and a slipping clutch mechanism protect the hardware from forced turning, an important consideration for any external entrance.
3. Lockey 2210 Mortise Deadbolt
When maximum physical resistance matters more than latch convenience, the Lockey 2210 delivers a solid mortise deadbolt with a stainless steel core shaft. The bolt throw provides genuine forced-entry resistance that a spring latch alone cannot match. It requires a manual throw-back to re-engage after each opening, which adds a deliberate step but significantly increases security for high-risk uPVC entrances.
This is the model to consider if your composite entrance sits on a ground-floor flat, faces a public footpath, or has been targeted before. The deadbolt mechanism embeds within the frame, distributing resistance across the structural profile rather than relying on surface-mounted hardware that could be pried away from hollow uPVC chambers. An adjustable 60/70mm backset ensures compatibility with common profiles.
One practical note: the 2210 works brilliantly as a secondary locking point alongside a primary latch, such as the 2835 or 2435KD. Running both gives you the everyday ease of a spring latch plus the added strength of a deadbolt for overnight or away-from-property security. Many UK locksmiths recommend this layered approach for ground-floor uPVC installations in urban areas.
4. Lockey 2200 Surface Rim Lock
Not every uPVC installation allows for mortise cutting. Older frames, thinner profiles, or heavily reinforced sections with internal steel can make pocket cutting risky. The Lockey 2200 avoids this entirely with a surface rim-mounted sliding bar design, featuring a 57mm throw that provides serious resistance without any internal modification to your frame.
You can position the 2200 as close to the edge of the entrance as your profile allows, which helps with narrow stile configurations sometimes found on uPVC side panels and secondary exits. The sliding bar requires manual throw-back to re-engage, similar to the 2210 deadbolt, so every closure is a conscious decision. Available in satin chrome, bright brass, and japanned black finishes, the satin chrome is again the recommended choice for weather-exposed external installations.
The 14-button keypad and over 7,000 code combinations remain standard, and the lock arrives as a complete fitting kit, including a template, fixings, and instructions, suited to maximum thicknesses of up to 55mm. For composite construction with hollow profiles, through-bolting with backing plates distributes the mounting load across a wider area, preventing localised stress that could crack the frame over time.
5. Lockey Super 8 7055
The Super 8 7055 takes a different approach to uPVC compatibility. At just 40mm wide, its slim profile sits neatly on narrow stile frames where wider keypads would look bulky or simply wouldn’t fit. But the real advantage is the patented code chamber with additional tumblers that allow you to use the same digit twice in your combination, such as C2244 or C18227. This dramatically increases the number of available codes and makes it easier to create memorable sequences.
It pairs with existing uPVC and aluminium sash mechanisms when supplied with the correct square-bar spindle, and Lockey offers reversible lever handles suited to both left- and right-hand openings. The hold-back facility and free passage function both come included, giving the same flexibility as the 2835 in a narrower package.
For holiday lets, serviced apartments, or shared accommodation with uPVC entrances, the ability to set easily recalled but still secure codes is a genuine operational advantage. Cleaners, maintenance staff, and guests can all receive distinct combinations without worrying about running out of unique digit sequences. The 7055 also works with the LD930 narrow stile latch for gate applications if you need to extend coded access beyond the main entrance.
Quick Comparison: Which Model Suits Your uPVC Installation?
| Feature | 2835 | 2435KD | 2210 | 2200 | Super 8 7055 |
| Mechanism | Mortise latch | Mortise latch | Mortise deadbolt | Surface rim bar | Mortise latch |
| Backset | 60/70mm | 60/70mm | 60/70mm | N/A (surface) | Works with sash |
| Key Override | No | Yes | No | No | No |
| Hold Back | Yes | Yes | No | No | Yes |
| Free Passage | Yes | No | No | No | Yes |
| Body Width | Standard | Standard | Standard | Surface mount | 40mm narrow |
| Best For | Primary entrance | Rental properties | High-risk areas | Retrofit / thin frames | Narrow stile uPVC |
| Finishes | SC, BB, JB | SC, BB, JB | SC, BB, JB | SC, BB, JB | SC, BB |
How to Choose the Right Model for Your uPVC Setup
Understanding Your Frame Construction
Before ordering, take a close look at your existing uPVC profile. Most modern composite frames in the UK incorporate steel reinforcement within hollow chambers, and the position of that reinforcement determines where you can safely drill and mount hardware. A mortise-style model like the 2835 or 2435KD needs a pocket cut into the edge of the frame, which works well on profiles with adequate material thickness but could weaken very thin sections.
If you’re unsure, measure the overall thickness and check whether your current handles sit on a reinforced section. Lockey Digital supplies a drilling template with every product, and all components accommodate thicknesses up to 55mm as standard. For anything thicker, contact the Lockey team directly, as extended spindles and longer fixings are available as accessories.
Multipoint Compatibility Considerations
Many UK uPVC entrances use multipoint locking systems with hooks, rollers, and a central gearbox operated by lifting the handle and turning a key. Adding a keypad-operated product to this type of setup requires a model that provides sufficient handle rotation to activate the gearbox mechanism. The Lockey Super 8 7055 was designed with narrow stile frames and existing sash mechanisms in mind, making it the most natural fit for multipoint configurations.
The lever handle on the Lockey 2835 also provides sufficient rotation to engage most common gearbox types, though compatibility varies by manufacturer. Winkhaus, GU, and Fuhr systems tend to work well, but it’s always worth checking the specific spindle type and centre measurements (typically 92mm PZ) before purchasing. Lockey uses an 8mm square-drive spindle on applicable models, which matches the follower found in most standard multipoint mechanisms.
Backset and Fitting Measurements
The term backset refers to the distance from the edge of the frame to the centre of the keypad. Most Lockey 2000 series products offer an adjustable 60 or 70mm backset, covering the two most common UK standards. Getting this measurement wrong means the latch or bolt won’t align with the strike plate, so grab a tape measure before you order. The adjustment is straightforward; you simply slide the cam assembly on the latch to the correct position.
Finishes and Weather Resistance
For any external uPVC installation, the satin chrome finish is the recommended option. It handles rain, humidity, temperature swings, and even coastal salt exposure far better than bright brass, which can tarnish in exposed conditions. Mechanical construction means there are no circuits to corrode, no batteries to drain in freezing weather, and no software vulnerabilities. These products are manufactured in Japan from materials specifically selected for long-term environmental durability, with Teflon coatings on internal components to reduce friction and extend operational life.
Common Mistakes to Avoid
One thing I see regularly is people ordering a surface-mounted model when their frame actually has space for a mortise installation, or vice versa. A surface mount like the Lockey 2200 is the safer choice when you’re uncertain about internal reinforcement, but a mortise model will always sit flush and look cleaner on the finished installation. Another frequent error involves spindle length. The standard spindle accommodates profiles up to 55mm, but some insulated uPVC frames exceed this. Lockey supplies extended spindles as spares, so measure first and order the correct length alongside your primary hardware.
Drilling through uPVC requires a sharp HSS bit at a moderate speed. Going too fast melts the plastic; going too slow causes cracking. Use the supplied template, mark your hole positions with a centre punch, and drill pilot holes before widening to the final diameter. Preserving the weather sealing around your frame is essential for energy efficiency, so apply silicone around fixings once the installation is complete.
Frequently Asked Questions
Can you put a keypad lock on a uPVC door?
Yes, and Lockey Digital offers several models specifically suited to plastic composite construction. Surface-mounted options like the Lockey 2200 require no internal frame modification, while mortise variants, including the 2835 and 2435KD, fit into a pocket cut into the frame edge. The main consideration is your frame’s internal reinforcement; steel bars inside hollow chambers can affect drilling positions and mounting points. Lockey provides templates with every product to guide placement, and the adjustable backset on most models covers standard UK profile dimensions without requiring custom hardware or aftermarket adapters.
Are push-button door locks safe?
Mechanical keypad models from established manufacturers offer strong protection against common intrusion methods. The Lockey 2210 deadbolt, for instance, features a stainless steel core shaft that resists forced entry far more effectively than standard spring latches. Anti-thrust pins prevent the bolt from being retracted with a credit card or knife blade, and the slipping clutch on handles and knobs prevents damage if someone attempts to force them. With over 7,000 possible code groups across the range, guessing the correct combination is statistically impractical. Regular code changes further reduce any risk from shoulder surfing or observation.
What are the disadvantages of keyless door locks?
The main limitation is that all authorised users must remember the entry combination. Unlike a physical key that can be opened using muscle memory alone, a code requires deliberate recall. Models like the Lockey 2435KD address this by including a key-bypass cylinder alongside the keypad, providing a backup when memory fails. Another consideration is that mechanical keypads typically support only a single active code at a time, so all users share the same sequence. Wear patterns on frequently pressed buttons can reveal commonly used digits over time, though Teflon coatings and regular combination changes mitigate this concern.
What is the best lock for a uPVC door?
The answer depends on your priorities. For a primary entrance requiring everyday convenience with code-only access, the Lockey 2835 with its lever handles and hold-back facility is difficult to beat. Properties with multiple users or rental turnover benefit from the 2435KD’s key override option. High-risk installations might pair a 2835 latch with a 2210 deadbolt for layered protection. Narrow stile uPVC frames where standard-width keypads won’t fit call for the Super 8 7055, which measures just 40mm across. Whichever model you choose, mechanical operation means no batteries to replace and no electronic failures, qualities that suit exposed external uPVC installations particularly well.
Find the Right Keyless Solution for Your uPVC Entrance.
Browse the full Lockey Digital product range at lockeydigital.co.uk to compare specifications side by side. If you’re unsure which model fits your specific frame, the technical team is available on 01763 245245 or by email at enquiries@lockeydigital.co.uk. With over 41 years of experience in mechanical keyless security, they can advise on compatibility, spindle lengths, and the correct accessories for your installation.
