Ceiling vents

[ratchet]

I have ceiling vents in the kitchen and the bathroom , but not in the other rooms

see attachments

why are not in other rooms

If I put some in do they have to be a segment or can they be square ( easier )

Can I just cut a hole to fit a square one which will just clip in

I assume there will not be any timber above the ceiling adjacent to the architrave

I think if I have these vents it will make my rooms cooler

any help will be appreciated

[Skew ChiDAMN!!]

If I put some in do they have to be a segment or can they be square ( easier )

You can put any shape you desire in.

Can I just cut a hole to fit a square one which will just clip in

Yes.

Before I cut any holes though, I'd check that the cornice is square in every corner that you want to place a vent. If you want the vent butting up to the cornice as in the pic. and the cornice is out of square, it'll leave an obvious gap that looks terrible.

You're better off, IMHO, to leave at least a 1" gap between the cornice & vent, so that any "out of square" is less blatantly obvious.

And if you're going to do one this way, it looks better to do them all that way. That's why I'd check all the corners first, so you can decide whether it might be better to put a vent somewhere else.

I assume there will not be any timber above the ceiling adjacent to the architrave

Normally, no. But it never hurts to check first... it could save you from headache!

I think if I have these vents it will make my rooms cooler

On a really hot day it may just work the other way around. But then you can vent the ceiling cavity to the outside with a whirlybird or similar...

any help will be appreciated

[ratchet]

[/quote] On a really hot day it may just work the other way around. But then you can vent the ceiling cavity to the outside with a whirlybird or similar...[/quote]

I have a whirlybird , thats what started me thinking ( dangerous)

thanks

[Sturdee]

On a really hot day it may just work the other way around. But then you can vent the ceiling cavity to the outside with a whirlybird or similar...

Notwithstanding having 2 whirlybirds in our tiled roof it used to let a lot of hot air into the rooms through the vents, so I took them out instead.


Peter

[malb]

Bathroom and kitchen would have been fitted with vents as both generate moisture due to cooking or bath/shower and need the ventilation to minimise condensation and mildrew.

Whirlybirds in the roof will work well provided that there is adequate inlet areas (generally under the eaves). One potential issue with adding vents is that they will allow ceiling dust, vermin poop, etc to drop into the ventilated rooms. The vents themselves have flywire to keep out insects etc but the dust etc still goes through. I would also suggest some form of duct to get well above the level of any bulk insulation in the ceiling.

Our kitchen and wet area vents are the circular plastic variety. They don't look great, and have disculoured with UV exposure over the years, but they have one great advantage, the centre insert can unscrew from the main body to allow cleaning of the flywire screen 'filter' which needs to be done every few months. Most of the rectangular wall vents fitted are hard to keep in the gyprock because each time we clean them they erode a bit more gyprock.