VENT 3

vent 3

Building science proves to us the value of ventilation for moisture control and to create healthier, mold-resistant buildings. However, with some buildings, achieving adequate ventilation is difficult or impossible. In other cases, such as with educational facilities, the stakes are simply very high and no one wants to use construction assemblies that might promote the growth of mold and mildew.

Vent 3 is manufactured by Cromar Building Products, a leading European manufacturer of roofing membranes. Vent 3 is a triple layer high performance breathable membrane, made from high tensile spun bonded polypropylene layers around a micro porous polypropylene film. Designed for use in fully supported or unsupported tile, slate or metal roof systems, the high vapor permeability and waterproof nature of the membrane, combined with excellent tensile strength and high wind uplift resistance make Vent 3 the professional’s choice. It is equally suitable whether draped unsupported over rafters or laid directly over insulation or decking.

The outer layer forms the functional waterproof surface, the middle layer is the breathable waterproof membrane, and the inner layer protects the membrane from abrasion and damage, also giving additional strength. This enables the fabric to allow moisture vapor to pass through, while remaining fully waterproof from the outside. It has a PERM rating of 81, far better than many other breathable membranes. The upper surface is Blue, printed with the trade name and head lap lines.

  • A very strong, multilayer, breathable, synthetic roofing underlayment for use on pitched roofs.
  • Soft, comfortable top surface features slip resistant walkability.
  • Designed to provide breathable building technology for construction where health and air safety are of major concern, or where opportunities for conventional ventilation do not exist. (Note, of course, that the breathability of the overall roof system will never exceed the breathability of any one of its parts.)
Roll Dimensions 59′ x 164′
Roll Weight 23 lb
Roll Size 807 sq. ft.
Packaging 54 Rolls/Pallet
40 Pallets/Truckload