RV OWNER’S FIELD GUIDE · ROOF & BODY
Window & Seal Replacement
A well-maintained roof doesn’t help if the leak is coming in around a window instead.
Where Window Leaks Actually Start
Most window leaks trace back to the exterior sealant bead around the frame, not the window unit itself — a small gap or cracked bead lets water behind the frame where it can travel and show up as a stain well below or beside the actual window. Interior staining doesn’t reliably point straight up to the leak source.
Resealing vs. Full Window Replacement
If the glass, gasket, and frame are structurally sound, removing the old sealant bead and reapplying fresh sealant around the frame resolves most leaks without replacing the whole window. Full replacement is only needed if the frame itself is cracked, the seal between glass and frame has failed internally, or there’s visible frame delamination.
Old Sealant Has to Come Off First
Applying new sealant over old, failed sealant rather than removing it first is a common shortcut that fails quickly — the new sealant can’t properly bond to the surface underneath. A clean surface is what actually determines whether a reseal lasts.