Moved to Owning Your Own Home thread

My gf recently hired a company to fit new windows in her flat. Unfortunately I just noticed, once the project was finished, that there were no trickle vents in any of the windows. However looking at the quote these seem be included (specified as TBT commercial vents, not sure what these should look like).

Now that cold is back, there is a lot of condensation and mould starts to show in the new wall paint. Could the company be liable? Are there any laws or regulations regarding this subject? Any advice would be much appreciated !!!

Presumably (and regardless of any other regulations) if your gf was quoted and invoiced/charged for a product or service that wasn't provided, then this should be covered by uk consumer law?

See: Owning Your Own Home thread:
http://www.lfgss.com/conversations/156860/?offset=12450#comment12717081