Metal Roofing Membranes. Why and which ones?

Metal Roofing Membranes. Why and which ones?

 

A Metal roofing underlay should be vapour-permeable, yet water-resistant and airtight. When used in combination with genuine 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, an appropriate Metal Roof membrane 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.

Protect Your Roof with a Metal Roofing Underlay


A Metal Roofing Membrane is a roofing drainage underlay which drains away condensation .
Condensation can build up beneath standing seam and other kinds of metal roofs.

The chosen metal roofing underlay should be vapour-permeable, yet water-resistant and airtight. When used in combination with genuine accessories it can help to reduce condensation while improving overall airtightness.

It also can add thermal efficiency, and protect structural integrity.
Besides allowing condensation beneath stainless steel, aluminium, copper, and zinc roofs to drain away, a proper Metal Roofing membrane also reduces sound transmission like rain clatter.

It also minimises material stress by permitting a degree of movement between the sheets and the timber beneath.

These membranes usually are a little bit pricier than regular membranes, but they do pay off in the long run.
Giving the roof a tighter fit and a longer lifespan.

The use of 150mm wide timber sarking boards with 2mm gaps between is recommended.

Popular Brands and Options:

TYVEK METAL
DOERKEN DELTA TRELA PLUS
KLOBER PERMO SEC METAL

A breathable and structured separation layer for metal-covered roofs

Our own membranes may be used in all metal-covered pitched roofs and cladding setups. 
The sheet’s 8mm high dimpled random-fibre mat ensures that the undersides of the panels are permanently washed around by air. Serving as a drainage layer, the dimple structure reliably channels any moisture. 

The special arrangement of the dimples enables to be installed around details without regard to direction. The high density of the dimple structure ensured that panels may slide without being hampered by friction in the event of temperature fluctuations. Thanks to the breathability of the backing sheet (Sd c. 0.02m) any moisture remaining in the rafters or sheathing may safely migrate outside. 

Rattling noise caused by rail or hailstones is reduced by up to 15dB 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Leave a Reply