Its another condensation issue I'm afraid. Also I have low to no building / DIY experience so apologies for the poor terminology in this post
Basically I am redecorating my master bedroom and I have a ceiling which, towards a bay window, steps down about a foot. Now in the past two days we've had some real cold weather where I am and we have had the heating on all day and night for the past two days. Normally we have the heating on from 4am till 8am and then 5pm till 10pm.
Now I have noticed that in the corner of the ceiling where it drops down towards the Bay window there is a puddle of condensation that runs the length of the ceiling and is about a foot in width. I would almost say that the condensation area is in the shadow of the step in the ceiling.
Both parts of the ceiling (the main area and the step down in front of the bay) are plaster, the windows are double glazed, the walls are brick, but all sides have either another house or another room attached and there are no air bricks.
The loft insulation above the ceiling has two layers of standard fibreglass.
To me it seems that I need some kind of air ventilation in the ceiling where the condensation is collecting but before I go doing that I thought I'd check in with people who know what they're talking about ;)
Any and all advice greatly appreciated
Thanks in advance