Monthly Archives: October 2017

Structural Problems associated with metal roofings

Damage investigations form 2016 have revealed that some metal roofing systems have sufficient strength to resist extremely high winds , while other systems have blown off during winds that were well below design wind speeds. When metal roofing (or hip, ridge, or rake flashings) blow off during severe weather conditions, water may enter the building at displaced roofing; blown off roofing can damage buildings and injure people. This is because the wind uplift forces are greater than the weight of the roof and the “tie-down” fixings are, in some cases, not strong enough to resist the uplift effect. Read more….