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
applied to.

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
in it. 

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.