The Importance of Maintaining an Air-Flow in Your Loft: An important consideration when Loft Boarding a New Build is to ensure that the loft space and loft insulation combined can "breathe", interstitial condensation will very quickly manifest itself if the air-flow is restricted causing damp issues and further ongoing problems, this is particularly the case in New Builds that are under two years old as they will contain considerably more moisture than that of a New Build that has been through the drying out period.