Can't I block a vent to a cavity wall?

[brummieaxgt]

I have a small bathroom with two vents through a cavity to air bricks. They are on the same wall approximately 2.5 meters apart. They are not sleeved through simply air brick on the outside and plastic vent on the other.

When fitting my new bathroom the one vent is where the shower will be so would like to block the inside vent and tile across if not an issue.

Where previously there was no extraction fan in the bathroom there is one to be fitted and now double glazed windows.

Would this be a problem to block this up?

What is cavity wall insulation was added at a later date. Any help appreciated guys.

Thanks

Reuben

 

[theoldun]

As no one has answered your question, will do so for you.

As long as you are fitting extract fan, then no problem in bricking up air vent and parging sand and cement over to bring flush with existing plaster. Tile away then to your hearts delight. If having cavity wall insulation in the future, then there will be no problem with the one bricked up.
Regards the other one, either do as first, but you will have to make tidy job of patching plaster, or remove interior grill slip cavity sleeve in and refix grill.
Regards oldun