A SECRET WEAPON FOR SASH WINDOWS

‘It’s essential to hardly ever block window trickle vents and to stay away from about draught-proofing windows in kitchens and bathrooms wherever the moist air needs to flee,' suggests Natasha Collins-Daniel, campaigner within the Centre for Sustainable Vitality. 'If not, you might end up having damp or mould troubles.'Dig into chopping-edge me