Trickle vents

Doozergirl

MouldyOldDough said:

How do they prevent pressure from building up ?

I am now worried that my rooms without trickle vents are all going to start exploding from internal pressure !!

I'm not sure why you still think it's about pressure?  Houses need ventilating, constantly. 

I live in an airtight house.  I do not have trickle vents, I don't even have a letterbox.  I do have a very expensive mechanical ventilation system.  If it is switched off, the house *very quickly* starts to develop visible condensation, despite the house also being warm. 

Most people's houses are leaky anyway.  In some houses they will be an incredibly valuable source of ventilation, in a very leaky house they would be just another hole in the building fabric. 

But ventilation is essential. 

Troytempest

I hate them - far better ways of providing ventilation so I have bought some UPVC strips and simply removed them and covered the holes inside and out with the strips. Looks better and no more draughts and whistling in high wind.

MouldyOldDough

It does seem rather stupid 
Paying for expensive triple glazing which is designed to seal on your house against drafts and then opening up a hole to let drafts in .,,...

Albermarle

MouldyOldDough said:

It does seem rather stupid 
Paying for expensive triple glazing which is designed to seal on your house against drafts and then opening up a hole to let drafts in .,,...

In general there is always a trade off between making a house draft free, and having enough ventilation.
It is a compromise.