Concrete roof cleaning

Hi i got a quote of 3,500 to get the roof cleaned from a one of the well known companies, they listed 10 details steps they will do but i think its a big rip off. Am sure it will cost 1/10 if DIY. Was looking up on net and found very limited info.

http://howtoaustralia.com.au/wp-con...to-Removing-Lichen-And-Moss-On-Roof-Tiles.pdf

any more help will be appreciated.

Regards

Welcome bigM

What type of roof tile do you have?
From your link its basically about removing lichen moss which normally occur on terracotta tiles.
If you have terracotta this is one of the easiest to restore.
Terracotta do become porous like cement tiles and nead resealing.
High pressure water cleaner and a coat of reseal over the tiles.
I would clean, spray with neat bleach and leave for a few days rinse and reseal.
 
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