Wednesday, September 27, 2023


What is causing the chipping on my RV?

The below question was posted in one of my many Facebook groups. This one was in Keystone RV – In The RV Shop, where we have more than 3,100 members. Members post problems and the group members and myself try and help each other out with problems, concerns, products, and upgrades.

One group member, Lizzie, asked this question:

What is causing the chip pops and the touch-ups to repop? It goes on one side from the top to the bottom back right side and above the storage covers. None around windows or doors. 2014 Keystone RV 29RE Diamond Edition.

Paint chipping on RV
It is the result of a small amount of moisture getting into your compartment door wall.
Chipping on RV
It is the result of a small amount of moisture getting into your compartment door wall. This happens all the time and can be prevented by protecting the unit with sealants.

My reply:

Lizzie, first let me say that I’m very sorry this happened. What is happening to your trailer is called osmosis blistering. It is the result of a small amount of moisture getting into your wall. The moisture wicks its way out through the wood sheeting and slightly porous fiberglass by osmosis until it reaches the impermeable layer of the foam insulation. The moisture reactivates the glue and causes gassing to happen, which causes the bubbles and chips to occur.

Body reseal benefits

By caulking your RV, it helps to protect your investment and creates a watertight seal to protect your unit from outdoor elements. Applying caulk around the trim and windows helps to ensure that no outside elements get inside through the window frame or other gaps.

When there is no caulk, dirt and dust enter the RV more freely. If moisture from condensation, rain or snow, or by washing your unit gets into the RV, it can damage the structure or cause dangerous mold and mildew. Water and mildew stains can appear in the carpet and on the walls. However, in most cases it doesn’t show up right away, causing unnoticed dry rot to occur.

Caulking around certain joints creates a watertight seal that prevents water from outside from seeping into the cracks and crevices of your RV. If water gets in, it can cause a lot of damage that can be extremely costly to repair and even total your unit. Make sure to reseal your unit to prevent further damage.

DIY product links:

Our Facebook groups

These Facebook groups were created to help educate owners about parts, problems, repairs, fixes, and upgrades on RV units. We will be sharing videos that include WHAT’S IN THE SHOP? and SHOP TALK episodes with information on accessories and products that we use and install on the units from the shop.

We try and help as time allows to answer questions and problems. We encourage others to share their experience so we can build a resource page to help everyone.

Please follow us on YouTube, and see our published articles on and other social media pages.

Please feel free to share your stories, problems, and upgrades with us so we can build a resource page to help others.

Thank you,


Dustin Simpson
Dustin Simpson
I have worn many hats in the RV industry through the years. From an RV Technician, Warranty Administrator, Parts Administrator, Parts Manager, Service Manager and now Business Owner. I have even been deemed an RV Expert by the California court system, working on behalf of the customers, dealers, and manufacturers. My repair facility has been servicing customers at the same location since 2003. What sets us apart from the dealerships is we are here to fix and maintain what you have, and not sell you a new one. Whether you own a million-dollar unit or an entry level, my message to you will be the same, it needs to be maintained.


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