Home Improvement Questions? Ask a Handyman for Answers ASAP
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What you've quoted is a passage from "Approved Document F". The ADs are commonly mistakes for the BRs - they are simply advisory. However, adhering to the AD is a good way of being sure that you're satisfied the BRs.Whether or not you have to install a ventilation system is down to the air tightness of the building. A draughty house (like my own) tends to ventilate itself. See the Domestic Ventilation Compliance Guide. See section 1.1 of that guide, which explains the jurisdiction and purpose of the ADs and related guides. The DVCG gives objective ways of meeting the BRs, which the BRs and ADs do not.If the refurbishment is under Building Control, then I advise you to consult the BCO about this. They are the person who decides whether or not the building work passes muster. Be open and honest to the BCO, and they will be good to you. They're there for your health and safety, not to be obstructive. Some BCOs need more "understanding" than others ;-)
Thank you for your rating :-)