Moonhowler,

I chance upon this thread, and hopefully u can help me out.

I'm currently extending my backyard yard to a wet kitchen, and the current progress is say bout 70% done. Roof tiles are the large cement(or clay) corrugated kind, and ceiling are plaster ceiling. There isn't any insulation in between.

The issue is we found moisture/condensation spots on plaster ceiling joints on a few spots, and we thought it was due to roof leak. Efforts has been done to seal the roof even more, with bitumen tape i think, hopefully will stop the issue.

However, since laying the wet ground cement (prep for tiling) yesterday, this morning i found the condensation was more severe on the ceilings, especially the usual spots..and i found out it might be a condensation issue instead of roof leak, when i wipe the inner windows and its all damped. Usually I close off that area during the evening and night, so no ventilation movement, and i can feel its very humid with heavy masonry smell.

Now, i am leaning towards this might be a condensation issue due to the wet masonry works that's not all dry out, and bad airing practice i have been doing at this phase.

Does anyone faced this kind of issue before, and hopefully can enlightened me, as me and my contractor are still puzzled. My contractor is those China-man self employed kind, so i suspected he isn't well versed on this condensation matter as well.

Next phase I will try hoisting the new roof with pipe water to chk if any leakage from roof, so i can rule out the roof.

Its a nightmare for me at the moment, not knowing what shit is gonna come down the road due to this water/leakage/ condensation issue.