We offer UPVC mechanism repairs and replacement

UPVC Door Repair

UPVC Door Repair Specialists

UPVC doors Stirling may be affected by any one of a number of issues – many can be overcome without needing a whole new door. Our engineers carry all the common gearboxes and carry out UPVC Doors Repairs for the local area of Stirling.

upvc door repair mechanism from door in stirling

Measuring a UPVC gearbox

On many locking mechanisms, it is possible to change just the centre gearbox instead of the whole strip. We are often able to fix this on the first visit as our mobile locksmith in Stirling is fully stocked with all the common gearboxes for your UPVC or composite door. This means you will save on the cost of a full strip and labour on a return visit, getting value of service for your UPVC door repair in Stirling.

We have gearboxes available to replace Mila, Cego, Surelock, Fuhr, Yale, Fullex and Maco, GU, Era, and Saracen.

When identifying a gearbox for a UPVC door the first measurements to take into account are the Centre (often called pz), and the back set.

Measurement A is known as the Centre. This is the distance between the centre of the barrel and the centre of the spindle.

Measurement B is the back set which is distance from the front of the locking system to the middle of the spindle. The most common are 28mm, 35mm and 45mm. There are some other sizes on older door sections of upvc doors.

See if there is a manufacturer name stamped anywhere on the strip.

image showing how to measure upvc door repair gearbox in Stirling

Upvc and composite doors Stirling require a minimum of three points of locking for insurance purposes this can be attained with either hooks rollers anti slip bars, bolts or a mixture of the different styles.

As there are various points on the door which must marry up with the frame for the lock to be fully engaged. If the door is slightly out of alignment then it can cause an unnecessary strain on the lock when being closed and over time this can cause gross failures of the moving parts inside the mechanism in Stirling. But this can often be rectified and realigned by one of our Upvc engineers in Stirling

Unsure who has a key for your house? or if you require a free security review on your door locks give Bobs Locks A call today were we will be happy to talk through the different options

Bobs Locks can open jammed doors and get your stiff UPVC Door Lock working like new.

As a Locksmith in Stirling Bobs Locks carry Vast Array of UPVC Door Lock parts which enables Bobs Locks to carry out 95% of all failed Upvc gearboxes in the first visit, giving you the customer a great price with just 1 hrs chargeable labour

UPVC Door Lock Problem Stirling, Dunblane?

From losing your keys to your door failing or becoming stiff in the Stirling area, give Bobs Locks a call today and our Locksmiths will be happy to discuss the options with you. Or Visit 17 Upper Craigs Stirling.

Save your money with our UPVC specialists in Bridge of Allan.



This can be solved. We have various options available to adjust the door height and position, sometimes we may need to rehang the door or toe and heel the insert.

This is a common occurrence. We carry all sizes of British standard cylinders with the ability to make all doors in your property work off one key.

The gearbox can often fail due to other issues within the door and frame. Once we have replaced the faulty part in your UPVC door, we will realign your door to work like new again.

Often a sign of a blockage in the gearbox or a spun cam due to having used extra force or having tried to use the lock when a key was on the other side. We can repair this issue in one visit and fit a cylinder with a lifetime guarantee. 

This often arises when the door is out of alignment. You should get your UPVC door fixed at this stage to save expensive bills later down the line. We fix UPVC doors with adjustments, taking the strain off the working part of the door.

This indicates the gearbox has failed and will require replacement and adjustment to the door.

This indicates the mechanism may have failed and will require to be replaced and door adjusted to suit.

Yes we can help. We provide free security reviews and can help make your home secure again.

Looking for a UPVC specialist in Stirling that you can trust?