Roof breather vents can help prevent your loft suffering from condensation. Condensation is the biggest cause of Dry and Wet rot
Past modifications to insulate properties neglected to consider the original roof design & subsequently caused issues with condensation. Building Regulations have, for many years, recommended that the way to control the build-up of condensation is by using roof breather vents
Moisture accumulation is always worse in winter & during cold weather, the risk of condensation build-up within roof spaces is even greater. Dampness will stay in your home until it comes in contact with a cold surface; it will then condense and turn to moisture. This is when mould & other problems arise. You need to ventilate the loft so moisture can escape....
Roof Breather Vents are the answer