Windows covered in condensation

[UKBloke]

Hi
Many of the double glazed windows in our house are often covered in condensation each morning and I have to dry them all off.
The one in the bedroom is the worst, the left side is covered top to bottom and then tapers off off across the window.

This is a downstairs room, the colder it is outside, the worst the condensation.

Any idea's why this is happeneing, do I need new windows?
Thanks

 

[freddiemercurystwin]

You need more ventilation. Or to stop breathing.

 

[jurassic sparkk]

Open windows when cooking dinner.

 

[jurassic sparkk]

I take it that your windows have no trickle vents.

 

[UKBloke]

This happens overnight whilst we're asleep.

 

[UKBloke]

I take it that your windows have no trickle vents.

no idea, what do they look like?

 

[freddiemercurystwin]

They're vents in the top of the window, you'd know if you had them I suspect.

trickle vents - Google Search

Do you have night locks?

 

[Murdochcat]

This happens overnight whilst we're asleep.

Human breath contains a lot of moisture

Open a window slightly

 

[Odds]

Trickle vents, as suggested by the Jurassic Spark, are the answer. Fitted as standard these days. We're having a bedroom window replaced this year to fix the problem as it's done such a good job in a smaller room upstairs.

 

[UKBloke]

They're vents in the top of the window, you'd know if you had them I suspect.

trickle vents - Google Search

Do you have night locks?

No vents, these are quite old windows.
If night locks are locked window partly open, then yes but this will let the cold and noise in which kinda defeats the reason for having double glazed windows.

 

[Murdochcat]

No vents, these are quite old windows.
If night locks are locked window partly open, then yes but this will let the cold and noise in which kinda defeats the reason for having double glazed windows.

So you have to accept that the damp / mould will continue

What do you do in the summer?

 

[UKBloke]

So you have to accept that the damp / mould will continue

What do you do in the summer?

If it's hot at night then we open a window but I wouldn't expect condensation in the summer.

This doesn't happen in all rooms, the living room is fine, so is the kitchen, down stairs loo, back room, but the front 'snug' (I hate that name) is the one shown in the pic.
Upstairs, all the rooms.

 

[foxhole]

If it's hot at night then we open a window but I wouldn't expect condensation in the summer.

This doesn't happen in all rooms, the living room is fine, so is the kitchen, down stairs loo, back room, but the front 'snug' (I hate that name) is the one shown in the pic.
Upstairs, all the rooms.

Only happens where you are breathing with home shut.

 

[UKBloke]

Only happens where you are breathing with home shut.

Why does this happen in unoccupied rooms?

 

[Notch7]

Hi
Many of the double glazed windows in our house are often covered in condensation each morning and I have to dry them all off.
The one in the bedroom is the worst, the left side is covered top to bottom and then tapers off off across the window.

This is a downstairs room, the colder it is outside, the worst the condensation.
View attachment 334975

Any idea's why this is happeneing, do I need new windows?
Thanks

I bet the glass is just clear float 4mm with a silver aluminium spacer bar

If you replaced the glass with soft coat low e planitherm + warm edge spacer + argon gas, you would get much less condensation. Try getting it done on the bedroom window and see if it improves things

I doubt increasing ventilation will solve your problem, the problem is due to the temperature of the inner pane being below the due point made worse by curtains closed which stops warm air from the room reaching the glass + I expect your heating is off over night.