The DIY Fix is reader supported. When you buy after clicking a link on our site, we may earn an affiliate commission. Recent posts Is efflorescence a sign of damp? Should you be worried? Can rising damp cause dry rot? And is it serious? What is a damp proof guarantee & how long does it last? How much does damp devalue a house? What is damp proof membrane used for Can a blocked gutter cause damp? Is efflorescence a sign of damp? Should you be worried? Can rising damp cause dry rot? And is it serious? What is a damp proof guarantee & how long does it last? How much does damp devalue a house? What is damp proof membrane used for Can a blocked gutter cause damp?