Lots of condensation on inside of new roof membrane

We had a new roof fitted about a year ago and right away there was a lot of condensation on the inside of the roofing membrane. Part of the re-roof was to take the unused chimney down to below the roof, just inside the loft. It got better over the summer, but now it's cold again, much of the membrane is covered in water droplets which are then dripping onto stuff in the loft.

The centre of the loft is boarded out for storage and there is insulation below and around the boards.

The loft hatch is sealed, but next door's isn't. There is a dividing wall, but there is a space above the wall in the middle big enough to put an arm through and then maybe a 2 inch gap all the way along.

Could the chimney be the culprit? it is blocked up downstairs and runs through the centre of the house.

Thanks!

 

Thanks for the replies.

Regarding the vents for the eaves, there aren't any, I was looking at putting in some of the corrugated stuff to hold back the insulation when I replace the insulation next. There is always a good breeze through the loft though.

No tile vents either, they said the membrane they used should have been enough as it is breathable, but clearly not.

The chimney was just knocked down to right below the tiles and it's something that I'm going to get rid of when I get time. It isn't capped off, it is just open under the tiles and probably filled with rubble. The plan was to take it down to the floor in the loft and then fill it with foam until I can remove it in the upstairs level.

 

Thanks. When you got it down to the bedroom ceiling level, what did you do with it? Did you cap it off or fill it in? Just put insulation over it?

 

Haha, no expense spared, I like it!

 

That sounds even better! If I put an upside down cone in my loft, it'd be full of water in no time, it's that bad!

Going to see if I can get the roofer back to put some vents in then, cheers for the help everyone, much appreciated

 

That was something that crossed my mind, but when they first did it, I looked it up and it is the right way round, thankfully! Cheers.

 

Yep, white on the inside and writing on the outside, thanks.