Black uPvc windows

[CallumWK]

I have plans to renovate a house, which has the cheap aluminium windows and doors, so I will replace them with uPvc.

All companies I have contacted so far use Conch profiles, which seems to be an Indonesian company producing in China.

I never heard of them before, but Google tells me they are reliable.

Anyone experience with Conch?

My first thought was the regular white profiles, but lately I see many houses with the black color profiles, and they stand out from those with white color windows.

One of the companies I contacted actually advised against black, as they said they would twist in the hot sun, regardless of that they are reinforced with steel.

I have a hard time believing that, and think they may have another reason for their claims.

So has anyone experience with black color uPvc windows and doors?