Let's talk dirt

[Teeshot1939]

Need recommendations on how to clean and protect my Winnebago 11 year old fiberglass roof. It spent 6 months under an oak tree in Florida and looks just plain filthy. Thinking dawn soap for surface clean then Dicor Clean and Prep followed by Dicor Fiberglass RV Roof Coating. Any experience with these or other products? Thanks in advance!

[PastorCharlie]

A little bleach in the wash will do wonders for killing the fungus growing on the roof.

[wa8yxm]

Lwiddis wrote:
Your plan seems reasonable to me. However, “pretty” roofs aren’t the goal. Extremely water resistant is the goal.

My Roof was Bright Tec (one of the rubber roofs)

I treated it just like the kitchen floor with some minor changes.

2x a year I'd go up with a mop (or Long handled "Van wash" brush more often than not. this is a telescoping handle car wash brush. Flow through though that feature is not needed)

A bucket.
Spic and Span (just like the kitchen)

A garden hose with sprayer.. charged (pressurized)

and optionally a broom (The brush can double as a broom)

Brush all the loose stuff off. do an initial inspection.

Fill bucket about 2/3 with water and Spic & Span (I liked to go a bit heavy on the cleaner)

Then starting as far from the ladder as possible mop a 2-3 foot swath. hose it down, next swatch, hose it down and so on till I was standing on the ladder doing the last little bit.

You should then (next day) do a second roof inspection.
With rubber I did not treat. but with fiberglass... Might be needed. I'm not an expert on fiberglass roofs.

[zigzagrv]

I use a long handled brush with detergent to clean around vents, a/c etc. and power wash the rest.

[steveh27]

When I really need a deep clean on my fiberglass roof I use powdered comet with a scrub brush.

[Lwiddis]

Your plan seems reasonable to me. However, “pretty” roofs aren’t the goal. Extremely water resistant is the goal.