Adding trickle vents to a non trickle vented uPVC window?

[CluelessDIYer1]

Was re-reading our damp report from the independent surveyor & trickle vents was one thing listed as something that could be beneficial.

Not something i'd tackle if it could be done (i'd get some professional in), but can they be added afterwards or is it only when the window is being made?

IF they can be added afterwards then what's the process? They don't need to remove the windows do they?

Finally, how do they get on with heating in the house? Doesn't all the heat escape through these things or does that not happen?

 

[noseall]

Trickle vents can be retrospectively fitted, yes.

Tricky job though even for a pro'. A ruddy nightmare if there is an ally reinforcing bar in there!

You seem to have a lot of 'meat' showing on the top rail so it should be reasonably straight forward.

Just looking at the photos - I presume your house is rendered like the neighbours? How much of the header render is lapping down onto the window?