Fiberglass roof mold/fungus Help

[Big B]

I washed my used 5th wheel for the first time and found the roof covered black, green/gold mold and fungus. I managed to knock off a fair amount of it but still have some left that wouldn't wash off. I'm thinking a 10% bleach solution with detergent should do the trick but wanted others input first. The roof is fiberglass. I'm thinking after it gets cleaned I will need to wax it really well.

I'd appreciate whatever wisdom you seasoned full timers can give me.

Thanks

[Steve R.]

Originally Posted by Big B

I washed my used 5th wheel for the first time and found the roof covered black, green/gold mold and fungus. I managed to knock off a fair amount of it but still have some left that wouldn't wash off. I'm thinking a 10% bleach solution with detergent should do the trick but wanted others input first. The roof is fiberglass. I'm thinking after it gets cleaned I will need to wax it really well.

I'd appreciate whatever wisdom you seasoned full timers can give me.

Thanks

I have the same roof and can attest to its toughness. I would not hesitate to use a bleach mix alone but it might be good to first treat a very small test section if you add detergent.

[homeless]

I wash my whole unit with bleach to a very strong straight. I find it leaves a nice shine to the siding...

[jdpm]

Incredible product....used on my rv roof and many other surfaces.....simply does as the name says....wet surface and forget about it. phillip
Wet & Forget | The Ultimate Mold & Mildew Remover & Shower Cleaner.

[coffeeman]

We used this product inside our MoHo with good results so I inquired about using on a rubber roof. Here was their response:

Thank you for contacting us. The Clear Shell Mold & Mildew Inhibitor is safe for use on awnings and an EPDM rubber roof without disturbing the adhesive.

I hope this information is of help. If you have any additional questions, please do not hesitate to contact us at zephelp.commercial@zep.com .

Thank you,
Zep Commercial
Customer Relations Department


I would think it would work on the fiberglass for clean as well. On my fiberglass roof I would use Meguiars Cleaner Polish...easy on an off and less expensive than the Meguiars RV Flagship I used on the sides.


The Zep is an inhibitor so I'll see how it works on my slide covers and edpm roof on my Bighorn.

[JPFretired]

Go to any big box hardware store (Home Depot/Lowes) to the paint section and look for a product called (JOMAX). You mix it as directed and spray it on with a pump sprayer, wait 5 minutes then rinse it off with a water hose or power washer. It works great. I used it on my Dad's Class A which was covered with mold on the roof so bad the roof was complete black. Once done it looked like new.

[coffeeman]

Originally Posted by JPFretired

Go to any big box hardware store (Home Depot/Lowes) to the paint section and look for a product called (JOMAX). You mix it as directed and spray it on with a pump sprayer, wait 5 minutes then rinse it off with a water hose or power washer. It works great. I used it on my Dad's Class A which was covered with mold on the roof so bad the roof was complete black. Once done it looked like new.

I've used this product on my home and old class C and it does the job. You do have to mix with bleach and is for exterior use only. The Zep product is for interior and exterior and user friendly. The fact it is an inhibitor makes it nice for the inside fabric, curtains etc. The Jomax should go much farther however. Once my roof is cleaned to my liking I'll control with Zep. My slide covers are out all the time and lots of grime. The grime may take a pressure washer with low pressure to clean. My fiberglass roof spoiled me vs rubber as I could wax it(although a lot of work) and it would look very clean and shiny.

[jdpm]

I'm telling you guys....save yourself the time and effort and just get some Wet & Forget and follow the directions....wet the surface and forget about it....it will become as clean as new and you won't believe it. Works great. It all you need. Phillip