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) |
(+) |
(+) |
(+) |
|
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. |