Table 1 Overview of the suitability of lead-free flashing solutions for various flashing situations on profiled roofs 1)., Miljøstyrelsen

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Table 1
Overview of the suitability of lead-free flashing solutions for various flashing situations on profiled roofs 1).

Flashing product or flashing solution	Type	Inclined flashings (gable, fire crest, side of roof windows, attic side etc.)	Horizontal flashings (façade, attic front, roof window front etc.)	Brick chimneys and other square pipe penetrations	Steel chimneys and other round penetrations
Alternative materials
Softzinc	Soft zinc sheet	++	++	++	++
Form fittings	Stiff fittings, plastic or fibrous cement 2)		++
Flex-alu	Adhesive pleated alu foil	+	+	+	+
Wakaflex	Adhesive rubber-composite	+	+	+	+
Polymer with metal-reinforcement	Plastic-composite under development	+	+	+	+
Titanium zinc	Ordinary zinc sheet 3)	(+)	(+)	(+)	(+)
Aluminium sheet	Ordinary aluminium sheet (stiff) 3)	(+)	(+)	(+)	(+)
Stripflash	EPDM-strip with alu edges 4)	(+)	(+)	(+)	(+)
Masterflash (and others)	Moulded EPDM-flanges 4)				(+)
Roof membranes	Wellknown 5)	++
Bituminous felt	Wellknown 5)	++
Alternative structures
Side gutter	Gutter under roof surface of various materials 6)	++		++
Embedding	Roofing material to be embedded in e.g. brick chimney 4)	(+)	(+)	(+)

List of signs:

++	The material/solution is considered technically suitable.
+	The material/solution has promising technical qualities, but no long-term experience is available yet.
(+)	The material/solution is applicable in principle, but is considered having technical or price weaknesses. See notes for the individual solutions - marked with an "x)". The evaluations are described in more detail in the report.

Notes for table 1:

1)	As a supplement to table 1, it should be noted that new roof windows are today mounted with lead-free flashings as standard. For lead-free renovation of flashings on old roof windows new lead-free standard flashings might be preferable, if the measurements are correct. There is also the possibility of using some of the mouldable flashing materials mentioned in the table.
2)	Today only available for horizontal flashings for corrugated sheets. Potential for manufacturing of other roofing materials and inclined flashings.
3)	The signature ++ at inclined flashings applies only to the suitability of the material for side gutters. The material is also applicable for other flashing types, but individual design is considered very expensive. Potential for application for form fittings.
4)	Fixing/tightening is considered unsuitable. The evaluations are described in more detail in the report.
5)	For profiled roofing materials this material can only be used for side gutters. It is suitable for most flashing types on roofs of the same material. I.e. bituminous felt and membrane roofing respectively - plane roof types on which this table does not focus (see report)
6)	Side gutter can only be used at inclined flashings (including chimney sides) Side gutters are only recommendable on roofs with an efficient underroof, preventing snow penetration.

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