The way to clean mildew is with a solution of one part bleach to four parts water.
How much bleach to ckean deck and siding.
I put 1 1 4 gallon of water into the sprayer and add 1 4 gallon of bleach into the water.
Apply the solution to the algae or mildew.
Pour 2 gallons 3 78 l of warm water in a 5 gallon 18 92 l bucket.
The natural bleaching action creates the impression of a cleaner surface which in reality is only bleached but still needs cleaning.
For a stronger solution mix together one third cup powdered laundry.
Leave the solution on the deck for about 10 minutes.
Reapply as needed to keep the surface wet for 5 minutes.
You can experiment with different proportions but this works well for me.
Once you have your bleach water solution pump up the sprayer.
As a cleaner bleach provides minimal results.
How to clean decks with clorox proresults outdoor bleach.
Continue to mix the solution until the components are well incorporated.
Let the bleach solution sit on the stain for 15 minutes then scrub with a brush and rinse.
There are much better wood deck cleaners out there other than bleach or bleach based cleaners.
70 water 30 white vinegar makes a great all purpose vinyl siding cleaner that removes light mold and mildew stains.
Add cup clorox regular bleach 2 with cloromax to 1 gallon water in the 5 gallon bucket.
Pour 2 cups of clorox proresults outdoor bleach into 1 gallon of water in a plastic bucket or container.
If your deck has a pretty thick layer of dirt and algae like mine did you ll need to scrub a little to get it into the grooves.
Cleaning with bleach does kill mold and mildew that may be on the deck but it does not eliminate the spores from which mold and mildew grow.
Wood surfaces must be sealed one.
For larger jobs use 1 cups bleach added to 2 gallons of water.
Wear old clothes shoes and rubber gloves.
Use three parts warm water to one part bleach.
Spread the oxygen bleach solution on the deck with the scrub brush.
Use the deck brush to spread the oxygen bleach cleaning solution over the deck.
Add 2 cups 400 g of powdered oxygen bleach and mix the solution together using the sponge or brush that you ll be using to scrub down your deck.
Pre wet the surface to be cleaned with water.
Check the deck for signs of algae mildew and other stains.
Bleach is not a great wood cleaner it can damage the wood fibers.