Masons Insulation Strap is used to secure underlay and insulation for roof and wall applications.

As per NZBC The Building-wrap requires to be restrained from bulging into a drained cavity where stud spacings are greater than 450mm. This to prevent the building wrap and insulation from protruding into the drained cavity. Acceptable means of achieving this are by using strapping at 300mm centres fixed horizontally and drawn taut.