Harry works for a FENSA Approved installation company. He's on a mission to help professionalise installers and protect homeowners across the UK, so he started this advice column.
A recent question and answer session posed in the Daily Telegraph about the use of trickle vents has been the source of much debate on Twitter by members of the installation community.
Jeff Howells advice to a reader on whether he or she needed to replace windows with trickle vents with like has served to highlight the complexities facing many a homeowner and installer.
Our parent company The Glass and Glazing Federation outlines the current correct guidance on using trickle vent windows.
All buildings have to be ventilated in order to maintain the health and well being of everyone using them. There are two kinds of ventilation: background and rapid. Background ventilation can be provided by trickle ventilators. Rapid ventilation by opening the window.
The need for background ventilation depends upon the building and how it is currently being ventilated. When it comes to replacing windows an installer will need to determine if background ventilation would be required.
If a window is not well ventilated then it can lead to condensation build up which, if left, can lead to the proliferation of potentially harmful mold spores.
The above answers the readers question posed in the Daily Telegraph but it was not the same advice given in the article itself which referred to a period in 2010 when originally trickle ventilation was going to be installed in all replacement windows. This recommendation was changed following discussions between the fenestration industry and the Government department responsible for buildings regulations, which agreed this would not be required.
If you have any comments or questions then please do share them below.
*Source: Approved Document F Clause 7.3: Where the original windows were fitted with trickle ventilators the replacement windows should include them.
Check that you use a FENSA Approved Installer but also check the following: