problem with slates 
problem with roof tiles 
open skylight
defective flashing at pipe outlet 
plumbing leak in loft 

Where ceiling meets front or rear wall

gutter leak or gutter overflow

At bay or oriel window

leak in roof 

wind driven rain through damaged joint

Where ceiling meets gable wall

damp stone work

leak from flashing

condensation if mould present

Top Flat - Modern Block

Middle of ceiling

excessive condensation on cold steel beam

Middle Flat

Middle of ceiling

plumbing leak

Middle Flat – Modern Block

Middle of ceiling

excessive condensation on cold steel beam

condensation if under a walkway or balcony

Where ceiling meets front or rear wall

defective DPC where concrete floor slab meets external brick 

condensation from "cold bridging"

leak from around window above