The terms PVC and uPVC are often used interchangeably, but they refer to two distinct materials with very different properties. Understanding the difference is simple, and it all comes down to the letter ‘u’.
The Simple Difference: Plasticizers
The “u” in uPVC stands for unplasticized. This single difference dictates whether the material is rigid or flexible.
- PVC (Polyvinyl Chloride): This standard form of vinyl contains plasticizing chemicals (such as phthalates) to make it soft and flexible. Its malleability makes it unsuitable for structures that need to be rigid.
- uPVC (Unplasticized Polyvinyl Chloride): This material is also known as rigid PVC. It is manufactured without plasticizers, resulting in a very hard, strong, and durable material that does not flex.
Why is uPVC Used for Window Frames?
In the UK, when you see a “PVC window,” the frame is almost certainly made from uPVC. Its unique properties make it the ideal material for modern windows and doors.
- Strength and Durability: uPVC is incredibly tough and rigid. It doesn’t rot, rust, or decompose, and it can withstand harsh weather without losing its shape, providing excellent security.
- Thermal Efficiency: As a material, uPVC is a very poor conductor of heat. This means it helps to keep warmth inside your home, making it far more energy-efficient than aluminium or wooden frames.
- Low Maintenance: Unlike timber, uPVC doesn’t need sanding, treating, or painting. A simple wipe with a damp cloth is all that’s required to keep it looking new.
What is Flexible PVC Used For?
Because of its softness and flexibility, standard PVC is used for completely different applications where rigidity is not needed. Common uses include electrical cable insulation, plumbing pipes, shower curtains, waterproof clothing, and various other plastic products.
Is uPVC a Better Material?
For window and door frames, uPVC is unquestionably the superior material. It is stronger, more durable, safer, and more energy-efficient than flexible PVC. Furthermore, uPVC is a recyclable material, and because it contains no added plasticizers, it avoids the health and environmental concerns associated with some older PVC products.
Here at Medway Windows and Doors we offer a stunning range of uPVC windows to choose from. If you’re looking for a fresh set of windows in Kent and the surrounding areas, contact us today. We would love to help!
