Jump to content

Mildew on Rubber Roof


Recommended Posts

I tried search and came up empty so I'll give this a try. Anybody know how to clean mildew off the roof. I use laundry detergent, bleach, and warm water to clean it off hardiplank on home but will this damage the rubber roof.

Any advice appreciated

391RES Open Range

Dodge 3500 DRW

Link to comment
Share on other sites

I've used this on a rubber roofed RV twice, with good results both times, and no detectable damage.  No scrubbing needed.

You you dilute it 5 to 1 with water and spray it on with a pump sprayer.  My old RV had been sitting under trees for several years, so it had lots of mildew and lots of lichens.  A week or so later it had killed everything and removed most of the stains.  I used a garden hose with a narrow high-pressure pattern to wash it off.  The lichens were dead, but as I recall, I had to scrape most of them off.  The roof was still stained where the lichens were, so I sprayed again, and after a week or so, and another spray with the garden hose, all was good again.

If you don't already have a pump sprayer, they also sell a version that is a sprayer that just connects to a hose.  I already had a gallon sprayer similar to the second link below, so I chose to buy the less expensive half gallon bottle of just the liquid.




Edited by DanZemke

Volvo 770, New Horizons Majestic and an upcoming Smart car


Link to comment
Share on other sites

Every time I wash the RV I mix a few oz bleach and auto wash soap into a 5G bucket of water. I then start on the roof and wash downward. That is enough bleach to kill all mold/mildew yet not damage the awnings or anything else.



2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG retired;Good Sam Life member,FMCA ." And so, my fellow Americans: ask not what your country can do for you--ask what you can do for your country.  John F. Kennedy 20 Jan 1961


Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

RVers Online University



RV Destinations

Find out more or sign up for Escapees RV'ers Bootcamp.

Advertise your product or service here.

RVTravel.com Logo

  • Create New...