Ventilation in buildings is a vital part of a healthy environment, managing the relative humidity and the risks that come from having too high Rh*, condensation and in the worst cases, mould growth.
The legislation assumes that replacing windows will eliminate some natural air infiltration and potentially, having a detrimental effect on the indoor air quality and the natural ventilation, leading to increased Rh*.
Background ventilation can be done by several methods, trickle vents in windows, air bricks or mechanical ventilation.
Therefore, it is a legal requirement where technically feasible to fit background ventilation where required, most commonly in the window through the means of trickle ventilators. The size of the trickle vent will depend on the property, whether or not the extractor fans in the wet rooms are intermittent or continuous, the heating provisions and the size of the window itself.
* Rh – Relative Humidity
For more information see health benefits.
Our MASTER INSTALLERS are a team of specially trained craftsmen, chosen to deliver a quality installation of your Masterframe windows.
“The communication and customer service has been excellent”. - Mrs B – Guildford
"These windows are a premium range but secure, A rated and have a very authentic grained appearance.” - GP – Essex
"The conservation officer had to be told that these sash windows weren't timber!" "They're a perfect match for the old ones and for our period property, but are more secure, retain the heat of the room and look great inside and out.” - Mr D W – Stoke
"We wanted someone we could trust. Having the double guarantee and back up of bygone themselves was the final reassurance we needed but we shouldn't have worried. Will get them back again next year when we can afford some more” - Mr C K - Derbyshire
"WE DESPERATELY WANTED TO RETAIN THE INTERNAL SHUTTERS" - MRS S.B - OXFORD
"The windows are lovely, the service and installation were excellent, and we’re now going to have the rest of them done” - Mrs C. J – Brentwood
