How to remove black mould on decking?

ChrisNoor

I am in the process of cleaning and restaining my 'black mold' infested merbau (I think) front deck. First I scrubbed it with hot soapy water and rinsed it with a high pressure washer. No change. I then scrubbed it with Cabots deck clean, twice, and after letting it sit for 20mins I rinsed it, after each application with my high pressure cleaner. No change at all. The black mold is still there. Is there anything else I can still do, or do I just go ahead and stain it with my Cabots Aqua deck? Or would it be better to use some sort of paint? I'm worn out by scrubbing it over and over. BTW, would sanding it help at all? 

Any idea would be helpful.  Thanks in advance. 

EricL

Hi @ChrisNoor 

Welcome to the Bunnings Workshop community. It's sensational to have you join us and thanks for sharing your question about your deck.

If after intensive cleaning and the mould still refuses to budge, the next stage I would recommend is to sand the surface of the deck back to wood. Bringing the surface of the deck back to wood will guarantee that the next stain or sealer you place over it will be properly absorbed. 

Here are some handy step-by-step guides:

• How to maintain a deck
   
• How to sand a deck 
   
• How to stain a deck

I also suggest having a look at this guide - How to restore a deck by @Adam_W.

If you need further assistance, please let us know.

Eric