I unfortunately park my motorhome in a location prone to becoming very dirty quickly due to dust from a main road and dirt dripping on the roof from over hanging trees. The road is the major offender all year round where dirt off the trees tends to be seasonal. The roof and other horizontal surfaces are particularly prone to becoming dirty. It has been particularly bad this year because it has been so dry. I am considering building a 'car port' style garage. Does anyone else park a motorhome under a similar structure and how effective is it at keeping the vehicle clean ?