How to Make the Roof Cleaner used in the Video

Cleaning A roof

A little background on how I started Roof Sparkle. A company that’s  make cleaning products asked me if I could make a video for some of there cleaning products. Now I wont go into details on who they are but they had a roof cleaner that involved the use a power washer. Big red flag in my eyes. Being a contractor for years I knew right off the bat that was a big no no.

So the next question I asked my self what’s that black stuff on the roof. Well it’s mold. And what kills mold, bleach right. Well as true as that is bleach is only made up of 5-6% Sodium Hypocrite. And that’s great for your whites and around the house but not on your roof.

How to remove those ugly black stains on a roof with Roof Sparkle

For the roof you will need something a lot more powerful. Some of you may know it as pool shock. This is made up of 12% by weight “Sodium Hypoclorite”. But because it’s as thin as water it will run right off the roof and not really have the time (five minutes) to do it’s job. So we have to thicken up a bit. Best way, add some liquid dish soap to the mix to help the SH stick to the roof for more then one second. You can go into any pool supply and ask for a gallon of shock, for about $4.00 per gallon. This is just a heavy duty version of household bleach. And no Walmart does not sell this or the big box stores.

Now of course we buy it buy the manufacture and by the truck loads at a time.

Applying It

When we started we used a regular bug sprayer. Use a three gallon pump sprayer, use one gallon of SH and two gallons of water (h2o) add about 4 oz. of liquid dish soap and spray from the roof top working your way down.


  • clean your roof when it super hot out in the baking sun. It will kill the SH and dry before it’s clean.
  • Don’t touch the SH with bare hands. Wear gloves and eye protection.
  • Don’t spray your roof down first with water to cool it off.

 Please do not call Roof Sparkle and ask any questions. Please ask any questions directly to me on this site please. Otherwise I’ll be forced to remove this page.. Thank you.

Dirt Roof

Dirty Roof

Clean Roof

Clean Roof









June 29, 2014

What if you apply your mix to roof and get a surprise rain? What happens to plants with run off? Even if you soaked during or prior. Also, not having the gutters to bag to protect them. Here in Florida it happens a lot. Sometimes can rain in the back yard and not in the front yard.

June 24, 2014

I just did my roof today using pool chlorine 1 part and water 2 parts. Soaked the roof with pump sprayer and kept it wet with garden hose misting it. Im in FL and it is hot and sunny today. All the dark brown and black rinsed off in few minutes like you said. Quick and easy process.

Yesterday I tried Krud Kutter I bought at Lowes – $25 for two gallons. That stuff stained my shingles brown and did not work at all. Your method fixed everything. Thank you for great advice.


June 18, 2014

Hi there
I am getting ready to do my shingle roof in florida and I want to know if I can use a 50/50 solution of liquid chlorine and water and then, add the dish soap. By the way, the tank I rented to mix it all up is 50 gallons. so how much dish soap should I use. any help would be great.


Tim Fauls
June 13, 2014

Great videos and Q&A info…outstanding Dominick.

Can we use a 5 gallon bucket & Wayne PC2 115-Volt 340 GPH Portable Transfer Water Pump, Bronze to send your mixed 3 gallon solution up onto the roof without having to climb up on the roof? I am not enthusiastic about climbing up on the roof.

May 29, 2014


Thanks for the great information on the moss removal. There is so much information available on the net I really appreciate your straight forward approach and advice. I am trying to decide between your method or using oxygen bleach cleaners with sodium percabonate & soda ash. Have you ever used these types of cleaners? Also what do you recommend for preventing moss from coming back?

May 23, 2014

Thanks for the great info, Dominick! I’m looking forward to trying this out. One question though – I have a bottle of Sunlight dish soap that says on the back ‘do not mix with chlorine bleach’, but my bottle of Dawn does not say that. The warning on the first has me worried though! What brand have you used? Have you ever used Dawn? I’d hate to have some I intended chemical reaction! Thanks.

May 16, 2014

great site Dominick! I live in central Canada where it is now 10C-15C during the daytime. It gets close to 0C at night.
I plan on applying your solution to my roof this weekend. questions: Do I need to rinse it off, or just wait for mother nature to do her magic with rain? Will the strength of the SH just dissipate over time and not harm my grass if I leave it on the roof without rinsing? If I do have to rinse, how long do you leave the SH on before the rinse? Can I use cold water from the tap?
I am a lady afraid of heights trying this myself, so the least amount of time on the roof the better!! Thanks.

John M
May 9, 2014

Hello Dominic first of all great site and thanks for all the help. Second I am having trouble finding a 3 gallon pump sprayer and if I do find one it is either bigger or expensive so I was going to get a 2 gallon one if that would work. Any idea how much shock and water and dish soap to use to get the mixture right. I got the 12.5 shock from pool place I have the The dish soap and water but I don’t know ratios go the 2 gallon pump sp5rsyer. I figured I would run it by you see what you thought or if you had another idea

Caryn Elizabeth
April 28, 2014

I have a composite deck at the base of my roof area I’ll be treating. The deck also has mold from it being on the north side. Will this solution be okay on the decking material? It’s like a trex deck but not that brand. Actually, forgot the name. duh! Can I try it on my front small wood deck to clean off the black from years of it sitting? Normally power washing would be done on it. I’m selling my home and the realtor gave me things to do to prepare it for a buyer. The poconos in PA is woodsey and while it’s beautiful, it’s also requires maintenance. Thanks Dom.

April 26, 2014

What kind of dish soap is the best to use?
Thank you.