THE 2-MINUTE RULE FOR SASH WINDOWS

‘It’s vital that you hardly ever block window trickle vents and to stop more than draught-proofing windows in kitchens and loos where by the moist air demands to escape,' claims Natasha Collins-Daniel, campaigner on the Centre for Sustainable Energy. 'Or else, you could end up with damp or mould troubles.'Sash windows are practical, attractive,