One says it is solely a ventilation problem.
thank you. There is no insulation In walls as they are about 3ft thick stone walls. We don't want to dry line inside and hide the problem. It's staring at ground level and goes so high and then spreads horizontally to the adjoining walls. This makes me think it's rising damp?This would be my first guess too. Condensation and mildew problems usually present themselves more often in the Winter as some people tend to dry clothes on radiators (without adequate ventilation) instead of tumble drying.
Other reasons could be
(a) rising damp caused by having no damp proof membrane in the rising walls
(b) no insulation in the walls which means hot air generated from the heating system is condensing on the cold outer walls.
The affected wall has a large old fashioned open fireplace where we have installed a new stove and new pipes and sealed the large opening. There is a second chimney at the other end of this room and we have blocked at top and bottom to prevent draughts. This room is extremely large and the windows have no vents.
Hi Leo,
A lot of the the architects that are well known for railing against modern building techniques are fossils of a bye-gone era.
How do I come to that conclusion? I've worked with them for over 30 years.
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