We have a 2009 17' hilo, bought new. Got it inspected and they said we need a complete new roof due to a chemical reaction from different metals used in the construction! Has this happened to anyone else? Been searching posts but haven't seen this problem. This happened during manufacturing. Did hilo know this? We always stored inside during the winter and have taken good care of everything. Suggestions?

What you're describing is called "galvanic response", I believe, and IS due to a small electrical current that is formed when different metals, such as aluminum and steel come in contact with each other. It causes corrosion to form.

The usual problems that have been reported are holes in the aluminum roof over nails or screws that were used to hold down the plywood. This problem is aggravated in areas of high humidity, which your location certainly has.

I don't know if there's anything you can do to repair your damage other than replacing the roof, but other members here may have some ideas.

- Jack

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Hi-Lo 1707T - Tire Minder TPMS on Tow Vehicle and Trailer, 300W Solar Battery Charger, Equal-i-zer WDH, Progressive Dynamics Converter, Fan-Tastic Fan, LiFePO4 battery 12V DC Electrical System, SoftStartRV mounted on A/C
2024 F150 Platinum FX4 3.5L PowerBoost SCrew

Klonicki, I sent you an email.

Bob

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2014 FR Heritage Glen 282RK
2013 F250 HD 6.7L Diesel
Formerly Owned: 1995 22D Fun Chaser & 2901L Classic

Several members have had this happen to them. Some have self repaired and others had J&R in Ohio repair. Consider replacing with a rubber roof.