Centre Cases
Replacement gearboxes for uPVC and aluminium door locks, in the common systems.
Front & Back Doors
Improve the appearance of your property.
uPVC doors are a popular choice for homes across the UK, and it’s easy to see why. They offer many benefits, making them a great choice for both a uPVC front door and a uPVC back door.
uPVC doors help to maintain high levels of energy efficiency with very little maintenance. No rot. No warping. No fading or discolouration.


The Benefits
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The main benefit of a uPVC door’s low maintenance is the minimal upkeep required, as they do not need painting, varnishing, or regular treatments to stay functional and look good. They are resistant to rotting, warping, and fading, and a simple wipe down with a damp cloth is typically sufficient to keep them clean. This saves homeowners time and money compared to other materials like traditional wood.
Energy Efficiency
Multi-chambered uPVC frames combined with A-rated double or triple-glazed units cut heat loss right back. A new uPVC door seals tight against draughts, so the heat you pay for stays in the house — most customers notice the difference on the very next energy bill.
Durability & Weather Resistance
uPVC is built for the British weather. It won’t rot, swell or warp in the damp, won’t corrode by the coast, and won’t crack or fade in the sun. The colour runs right through the foil finish, so it keeps looking smart for decades with no repainting.
Cost Effective
Security
Every uPVC door we fit comes with multi-point locking, anti-snap and anti-bump euro cylinders, internally beaded glass and reinforced hinges — built and tested to PAS 24 against the methods burglars actually use.
Variety
Choose from 18 foil finishes including anthracite grey, chartwell green, irish oak and rosewood, dozens of decorative and obscure glass designs, and a full range of handles, knockers and letterplates — with different colours inside and out if you like.
Durability
Built to stand up to everything the coast throws at it, with no rot, no warping and no fading years down the line.
Fix Don't Replace
Most faults come down to a worn part or a simple adjustment, so a repair is usually far cheaper and quicker than a whole new window or door.
Genuine Parts (3)
We supply genuine parts for the common window and door systems, so the repair lasts properly rather than failing again a few months down the line.
Local Aftercare
We are just up the road in Grimsby, so if you ever need us back you are dealing with the same local team, not a distant call centre.
Our Suppliers
We work with a range of local suppliers to ensure you are looked after every step of the way.
What is a centre case?
It is the central gearbox of a multi-point door lock. The handle and key operate it to drive the hooks and bolts into the frame.
How do I identify mine?
Bring the old one in or send a photo with the key measurements, such as the backset and the PZ centres. We will match it.
Do I need the centre case or the full mechanism?
Sometimes just the centre case has failed and can be swapped on its own; sometimes the whole strip needs replacing. We will help you work out which.
Which systems do you cover?
Can I fit it myself?
It is doable with a bit of care, as the gearing has to line up. We are happy to advise before you start.
Do you sell to the trade?
Yes, trade and DIY customers are both welcome.
What our customers say
Real words from homeowners across Grimsby and North East Lincolnshire.



