Contact with other materials and building components

Façade Small format products General information Contact with other materials and building components

Ensure that the PREFA small-format products do not come into direct contact with heavy metals (e.g. copper or iron), as this will increase the risk of corrosion. If you wish to use different materials in combination, these must be coated or separated from the aluminium profiles by non-conductive spacers (e.g. plastic washers). Materials must always be separated correctly when being used outdoors.

Impurities such as drilling dust, mortar residues or effluent from concrete on coated or blank aluminium parts must be removed immediately.

PREFA small-format products should be protected against potential harmful effects posed by other building materials (e.g. concrete) or environmental conditions (corrosive environments such as gritting salt).

Material pairing	Country atmosphere	City/Industry atmosphere	Lake/near the sea
Zinc	+	+	+
Stainless steel	+	+	+
Lead	+	+	-
Unprotected steel	-	-	-
Copper	-	-	-
Dry concrete	+	+	-
Concrete not set	-	-	-