uPVC Doors Letting The Cold In?

Well winter has well and truly let us know that it’s arrived hasn’t it! The cold snap took us to 0°C, and we even saw snow on our travels yesterday! And with the drop in temperature, we know we’ll be getting lots of calls about one thing – uPVC doors. Specifically, that uPVC doors are letting cold air into the house, which alongside giving you chilly toes is bad news for your heating bill. So today we wanted to provide a complete guide to why your uPVC door might be letting cold air in, and what can be done to fix it.

Your Door Needs Adjusting

The most common cause of draughty doors is misalignment. This is when the door is no longer aligned with the frame properly, creating a gap. This causes draughts, as well as your door handle not lifting to lock properly. You can tell if your door needs adjusting if there are gaps around the edge of the door between the door and the frame. If you think your door needs adjusting, your best bet is to contact your local locksmith, who can get it done for you in a jiffy. But if you’re a dab hand at DIY, we’ve got some instructions below.

Obstruction of the Door

There are, of course, other problems you could be having with your door. For example, we often see obstructions at the bottom of uPVC doors, like dirt or stones, which create gaps in the door seal and let the cold air in. Luckily this one is very easy to fix- just clean the frame and edges of your door! If there is still a draught, you likely need an adjustment.


If your door is fairly old, then there’s a good chance the draught is being caused by damage. This type of door is more susceptible to wear and tear, chipping and other damage as they age, so you should check the door carefully to see if there is any damage to the door or the door frame. If you find any, then the best option is to replace the door (and the door frame if needed) with a new one.

How to Tell if Your Door is Misaligned

Luckily the most common issue is misalignment, and it’s simple to diagnose and even to fix. To work out if your door is misaligned, close your door and hold the back of your hand close to the door, moving all around the edges. If you can feel cold air, then you will need to adjust your door.

How To Adjust Your uPVC Door Alignment

If you want to adjust your door yourself, you will need:

  • A cross-head screwdriver
  • A flat-head screwdriver
  • Allen Keys

The first step is to find the allen key spot on your door hinge and use the allen keys to tighten it. This is the draught-roofing process. Using the allen key you should adjust the der once all around the door, until it is level and balanced. If at any point you feel too much tension, stop immediately Depending on your door this could be done with a screwdriver rather than an allen key.

While that might seem like a very simple process, it’s very easy to get it wrong and accidentally damage the door. If you’re not confident aligning your door yourself, we recommend calling a professional to help

At My Locks, door alignments are our bread and butter. We adjust and align dozens of uPVC doors a day, and if we are already on site for something else we will often do it as part of the service. So if you would like to stay warm and keep your heating bills low this winter, just get in touch with the team today.