Substrates and preparation

Respraying tired uPVC instead of replacing it

uPVC yellows, chalks and scuffs over the years in a way that makes a whole house look dated even when the frames themselves are structurally fine. Respraying addresses the appearance without the cost and disruption of full replacement.

uPVC window frame being resprayed anthracite after full abrasion and masking

Why uPVC needs its own specific system

Standard exterior paint does not flex or adhere reliably to plasticised uPVC, which expands and contracts more than timber or metal with temperature. A coating designed specifically for plastic substrates is what actually stays put through a full range of seasons.

Old silicone residue being removed from a uPVC frame before respraying

Preparation drives the result more than the spraying itself

Every frame gets degreased and abraded to remove the factory sheen, since paint applied over an untreated glossy uPVC surface will eventually lift regardless of how well it is sprayed on. Silicone sealant residue around glazing beads also needs removing, as standard coatings will not bond over it.

  • Full degrease to remove years of accumulated surface film
  • Abrasion of the factory gloss across every frame section
  • Old silicone residue removed before masking and coating

Setting expectations on durability and colour choice

A properly applied uPVC coating holds up well under normal use, though very dark colours on south-facing frames experience more heat-related stress than pale tones. We discuss this trade-off honestly rather than only presenting the colour a client first asks for.

How we work on this

  • We degrease and abrade every uPVC frame fully rather than a light surface wipe.
  • We remove old silicone residue before masking for spraying.
  • We use coatings formulated specifically for plastic substrates rather than standard exterior paint.

Questions we are asked about this

Is respraying uPVC as durable as replacing the frames?

It is a different proposition — a good respray lasts well under normal conditions, but it is a refinishing process rather than a like-for-like replacement of the material.

Can you change the colour of white uPVC to anthracite or another shade?

Yes, that is one of the most common requests, and it is done with a system designed for the colour change rather than a standard exterior paint.

Does the glass need to come out to respray the frames?

No, we mask glazing carefully and spray the frames in place, which keeps disruption and cost down compared with removing units.

Send photographs of your frames and the colour you have in mind and we will confirm suitability.

uPVC can be resprayed durably with the right preparation and a coating designed specifically for plastic.

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