Fiberglass side bulging spots

[Pokemon]

I have noticed on the outside of my 2005 Dolphin LX 32ft that there are a few spots around the furnace and below the reefer that the fiberglass is noticeably bulging. Any others having that happen? Could it be heat from the furnace? Water from above somewhere? There are no indications of water inside the coach anywhere in that area. Thanks, Pokemon

[jim27358]

Most likely a small area that wasn't sealed properly that allow water to get in and freeze delaminating the side panel.

[Thewellz]

It may be as the above post says or it could be just swelling of the wood material behind the fiberglass panel from moisture or temperature changes...a good way to tell if it's delamination is to knock on it and if it sounds "hollow" compared to the rest of the wall it's probably delaminated or if you press on it and it gives then its de-lam for sure. The swelling or bulging areas are common where you describe and also around the middle band where the wall meets the bay doors and usually are nothing to be super concerned about if they are solid and not separating. Checking your seals at refrigerator roof vent and at wall openings might be a good idea.

[RVLover357]

This might help

https://www.youtube.com/watch?v=8NuO9U63lIM