Home DIY

The ex-tenants had all the windows locked shut, double glazing with no trickle vents, laundry drying everywhere and the heating on full blast.

I'm making an assumption that these factors, when combined, led to condensation forming on the inside of the external walls.

I am planning on fitting trickle vents, and maybe even opening a window now and then.

Am I mad?

Would've thought this exacerbated an existing problem, yeah.

The walls being mouldy though... personally that is a red flag type thing... steer well clear...