Beautiful, long-lasting uPVC replacement doors

Thermal Home Improvement's uPVC doors are of the highest quality, affordable, low maintenance and with our various styles can make a huge difference to your home. Our windows are also available in a variety of realistic wood effect colours. Cutting heating bills and keeping you safe and secure, when you choose a THI replacement front door or back door you're making the right choice buying the very best.

Our wide range of attractive replacement uPVC door designs don't just look good, they are robust and secure. Any company can provide a cheap front door but at THI you can be sure you get the best value for money as well as the highest quality product.

Fitted with Scorpion locks, 100mm security hinges, and mortice high-tensile steel deadlocks for your peace of mind, our uPVC doors are also steel-reinforced, and the door panels themselves are easily amongst the strongest in the industry!