More condensation after vents

[Between3and5k]

Hi folks,

I have a house build in the 50s a
with slate tile roof with dry ridge. I noticed last winter there was dew on the nails and everything I read and the few roofers I spoke to all said improve ventilation.

So I got 4 each lower side to improve this around November and noticed when we had the cold snap that the wood was more wet and the nails had frost. this gradually increased to what you see in the pictures. Its is breezy and cold.

Now it suggests this is the warm air hitting the cold in the loft but I'm a bit lost where to start.

The roofer said it will dry out in spring.and ill have no more issues

Do I insulate the loft hatch?

The boiler is on the 1st floor so I guess its causing some heat from the small cupboard

I'm concerned about rot of course and mold. Would a few mo.ths cause any concern?

Do I speak with a roofer or do I need to get someone to look at my insulation and get it re done.

Any advice appreciated.

 

[SpecialK]

Is the moisture above a certain point? My roof was pretty damp above the loft hatch. I have now sealed it with draught proofing tape and its much better.

Moisture can come up through downlighters, PIR's and extractor fans.

 

[Between3and5k]

I'll go up and have a look at the far side but it is noticeable near the hatch and mostly the west facing side of the roof. the east is not that damp.

whats the best way to proof the downloghters?

thansk for your quick reply.

 

[SpecialK]

I'll go up and have a look at the far side but it is noticeable near the hatch and mostly the west facing side of the roof. the east is not that damp.

whats the best way to proof the downloghters?

thansk for your quick reply.

You need to find a seal for your make of downlight or replace them

 

[foxhole]

Shouldn’t be any warm air in loft if your insulation is effective . Extractor fans don’t introduce moisture into a loft .

 

[Koolpc]

Insulate loft hatch. You can get special covers for downlights.

 

[JohnD]

The water is coming from somewhere. Have you got holes in the bathroom ceiling allowing steam to rise into the loft?

Do you drape wet washing inside your home?

Heat does not cause damp.

CONDENSATION IN LOFT (ANSWERS)

This seems to be the time of year for condensation in lofts, so instead of replying to lots of queries I though I would write this "one-size-fits-all" post. Please also see //www.diynot.com/wiki/Building%3ACondensation-in-Houses Condensation in lofts occurs when the amount of water...

www.diynot.com

 

[SpecialK]

Shouldn’t be any warm air in loft if your insulation is effective . Extractor fans don’t introduce moisture into a loft .

They do if they terminate directly in to the loft space..

 

[Loofah]

Do you have a soil pipe terminating in the loft? Check all vent ducting and that the insulation isn't blocking the vents

 

[JohnD]

So I got 4 each lower side to improve this

4 of what?

 

[Between3and5k]

The water is coming from somewhere. Have you got holes in the bathroom ceiling allowing steam to rise into the loft?

Do you drape wet washing inside your home?

Heat does not cause damp.

CONDENSATION IN LOFT (ANSWERS)

This seems to be the time of year for condensation in lofts, so instead of replying to lots of queries I though I would write this "one-size-fits-all" post. Please also see //www.diynot.com/wiki/Building%3ACondensation-in-Houses Condensation in lofts occurs when the amount of water...

www.diynot.com

Thansk John. the bathroom is downstairs. we try and keep the window open while showering.

We do dry some clothes in the house.

4 of what?

tile vents

 

[JohnD]

We do dry some clothes in the house.

Water vapour is lighter than air and rises through the house.

If you can't stop, hang the wet laundry in a room with an effective extractor fan, SHUT the door and window and run the fan continuously.

 

[RandomGrinch]

Apart from all the issues mentioned, i.e. stop warm moist house air from getting into the loft, by sealing loft hatches, downlights etc.
....sometimes the condensation can be a one-off. I had condensation in my loft for the first time I can remember, a couple of weeks ago.
The loft is well sealed from the house, and well ventilated.
The difference, it was a very cold night after a relatively mild day, there was also no wind, so no air movement within the loft.
The large cycle shelter outside a school, was covered in condensation that morning, and you can't get better ventilated than that!

 

[foxhole]

They do if they terminate directly in to the loft space..

Only an idiot would do that ?

 

[John D v2.0]

Only an idiot would do that ?

not necessarily - one could say it's smart to go home early if you get paid regardless!

To the OP, I think the main goal is stopping any house air getting through to the loft. A bit of surface condensation will dry out, but it shouldn't be building up anywhere (ie dripping anywhere or soaking through)