Side and Header wall flashings application
Remove old waterproofing system
If we had to do the side and header wall flashings of a
roof we would first remove the previously applied
waterproofing product. If it's a membrane product it
normally comes off very easily due to the weathering of
the heat and rain. You can either use a scrapper or
even your hands to tear it off. If it's a torch-on product
like the 4mm viapol torch-on you might struggle a bit.
Torch-on is a far more superior waterproofing system
but also costs allot more. You can remove it with a
spade or quality scrapper.
Apply Bituminous Primer
After you've removed the previous waterproofing
system and made sure that the surface is clean you
are ready to apply a primer. It's best to use
Bituminous products together when making a area
water tight. So having said that apply one coat of
Bituminous primer to the surfaced where the torch-on
will be heat fused on. Don't flash paint the surface with
primer, it's best if you cover all areas. Doing this will
allow the torch-on to glue properly to the area it's being
Apply Torch-on / Uni- torch membrane
Next you will have to apply a 3 or 4mm torch-on or
also known as Uni-torch onto the bituminous primer.
Uni-torch a bitumen product has a complex mixture
of APP( Atactic Polypropylene) with excellent
characteristics. Uni-torch has fiberglas mat, dual
reinforcement and non-woven polyester. These
attributes makes the it extremely strong allowing you
to even walk on it without tearing or puncturing it.
Uni-torch can also withstand high heat temperatures
for long periods of time enabling it not to weather
quickly. When you apply the torch-on remember to
overlap the ends by 75mm or more to ensure that the
area is water tight.
Apply a heat reflectant Silvakote
Lastly we will have to ensure that the sun doesn't
damage the torch-on waterproofing membrane. To do
this you will have to use a product by ABE called
Silvakote. Silvakote actually contains real aluminium
So much so that you first have to stir the tin so that the
aluminium can mix with the silvakote liquid. The
aluminium substance in the silvakote looks like silver
clay. When you open the tin of silvakote it will look like
a black liquid. Only once you've stirred it it will start
changing to a aluminium color. Work with clothes you
don't add to much value on because if you mess on it
it's almost impossible to get the silvakote off. Same
goes for bituminous primer.
You can use a normal paint brush to paint on the
silvakote. Once you've painted it onto the Uni-torch you
will see that the uni-torch stays black but after a few
minutes it will start turning into a silver color so bright
you can almost see your reflection in it.