Windows / trickle vents letting in cold

Windows / trickle vents letting in cold

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Discussion

juggsy

Original Poster:

1,428 posts

131 months

Monday 29th January 2018
quotequote all
Our 3.5 year old house has trickle vents on every window, which let in a huge amount of cold air even when closed. As I type this I can feel a draught from the window I'm sitting next to, despite both window and vent being closed. We're also quite exposed on windy days which doesn't help matters.

I understand the need for these so don't want to block them up, but want to replace them with something which seal better so I can control more effectively when cold/windy outside. Anyone have any thoughts? We have these if it helps, I assume cheapo ones house builders install:


iambigred

192 posts

126 months

Monday 29th January 2018
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Following as I am interested in this too. I have the same issue with my ~11 year old 'new build' house windows. On mine the draught seems to come through the join between the vent and the window, not the vents themselves. The vents are letting a lot of outside noise through too.

Perhaps there is a gasket or seal that could go in this area to prevent this. I had thought about sealing them with some silicone sealant.

Edited by iambigred on Monday 29th January 14:26

juggsy

Original Poster:

1,428 posts

131 months

Monday 29th January 2018
quotequote all
iambigred said:
Following as I am interested in this too. I have the same issue with my ~11 year old 'new build' house windows. On mine the draught seems to come through the join between the vent and the window, not the vents themselves.

Perhaps there is a gasket or seal that could go in this area to prevent this. I had thought about sealing them with some silicone sealant.
If you take a look at my picture I've done exactly that and sealed the gap between window and vent. However I can feel the draught coming from between the vent cover.

budgie smuggler

5,390 posts

160 months

Monday 29th January 2018
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I pulled mine off and blocked about 75% of the gap behind them with duct tape, then put the cover back on.

Still let air through, but stopped the draft being felt.

lj04

371 posts

192 months

Monday 29th January 2018
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I never understood the requirement of trickle vents on double glazing. They inevitably get closed when mostly required in the winter. Why not just have single glazed if your going to have an opening. I tend to have my new upstairs sash windows open to prevent condensation, whilst the neighbors with older sashes have a draft without opening.

Wozy68

5,391 posts

171 months

Monday 29th January 2018
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lj04 said:
I never understood the requirement of trickle vents on double glazing. They inevitably get closed when mostly required in the winter. Why not just have single glazed if your going to have an opening. I tend to have my new upstairs sash windows open to prevent condensation, whilst the neighbors with older sashes have a draft without opening.
The vents are for fresh air . Double glazed or not ..... well ok drafty old windows might not require them. From a security issue they’re far better than partially opening window locks. The victorians knew far more about airflow through a home and the health benefits than the modern build developers will ever know. Sealing up a house is not the way to make a house better for human habitation imo.

juggsy

Original Poster:

1,428 posts

131 months

Monday 29th January 2018
quotequote all
Wozy68 said:
Sealing up a house is not the way to make a house better for human habitation imo.
Agreed and hence my original question to replace with better quality rather than seal up the vents. There are certain elevations of the house far more exposed to the elements and thus on very cold/windy days I'd like a proper seal, and open them when conditions allow. Otherwise on some days the windows may as well be open!

lj04

371 posts

192 months

Monday 29th January 2018
quotequote all
I know the reason they are specified, but if people are going to seal them up during winter. What is the point. I have never seen one left open.

juggsy

Original Poster:

1,428 posts

131 months

Monday 29th January 2018
quotequote all
lj04 said:
I know the reason they are specified, but if people are going to seal them up during winter. What is the point. I have never seen one left open.
I can understand the point in theory, they’re a source of ventilation and air circulation to prevent moisture build up, mould etc. A lot of the year that’s fine, but for me in practice I’d like the option of closing them for rooms on the sides of the house more exposed to wind, particularly on cold days, as they make those rooms much colder and draughtier.

I can close them, but they may as well be open for all the good the shutters on them are.

V8RX7

26,883 posts

264 months

Monday 29th January 2018
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Seal them up with expanding foam / silicone.

Open your windows / use the 2nd latch when required.

I've successfully negotiated them out of my new build / refurbs citing the night latch setting as an alternative

barryrs

4,391 posts

224 months

Monday 29th January 2018
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I thought the only way you could do away with trickle vents in a new build was via PIV?

Then if your air test is <2 you will need to introduce background ventilation.

V8RX7

26,883 posts

264 months

Monday 29th January 2018
quotequote all
They are simply a way of letting air in - as is the nightlatch setting on the windows.

All Building Inspectors I've talked to have accepted that and signed them off.


barryrs

4,391 posts

224 months

Monday 29th January 2018
quotequote all
I wish I had building inspectors so amenable frown

blueg33

35,948 posts

225 months

Tuesday 30th January 2018
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Wozy68 said:
The vents are for fresh air . Double glazed or not ..... well ok drafty old windows might not require them. From a security issue they’re far better than partially opening window locks. The victorians knew far more about airflow through a home and the health benefits than the modern build developers will ever know. Sealing up a house is not the way to make a house better for human habitation imo.
No point in new build developers knowing when building regs say it has to be airtight