Tyvek® Metal roofing underlay is vapour-permeable, yet water-resistant and airtight. When used in combination with genuine Tyvek®accessories it can help to reduce condensation, improve overall airtightness, add thermal efficiency, and protect structural integrity.

Besides allowing condensation beneath stainless steel, aluminium, copper, and zinc roofs to drain away, Tyvek® Metal also reduces sound transmission such as rain clatter, and minimises material stress by permitting a degree of movement between the cladding and the timber beneath.

Key Benefits of DuPontTM Tyvek® Metal

• Water-resistant
• Airtight
• Vapour-permeable
• Allows movement and reduces material stress by providing separation between metal sheets and timber substrate.
• Reduces rain clatter and sound transmission.

 Key Properties of DuPontTM Tyvek® Metal

• Style name: 2510B
• Composition: Composite of high density polyethylene, polypropylene nonwoven and open mesh spacer
• Roll size: 1.5m x 25m
• Roll weight: 11.5kg
• Mass per unit area: 350g/m2
• UV exposure: 4 months
• Product/functional layer thickness: 7.40 / 0.22mm
• Water vapour transmission (Sd): 0.03m
• CE marking: Yes

Fitting Tyvek® Metal

Tyvek® Metal roofing drainage underlay is fitted beneath standing seam metal sheet roofs and the underlying timber boarding. The use of 150mm wide timber boarding with 2mm gaps between is recommended.