Never had a leak yet in my roof But I do inspect it and recaulk it every year. The best time to inspect it is just after you clean the roof.
To fix it, get some Dicor sealantand go on the roof and look for caulking that has cracked or is lacking.Then clean the spot with soap and water, spic n span works great to clean the roof. Then fill in the cracks or gaps with the Dicor sealant
Brian, Tamara, Abigail
2003 Lincoln Navigator Ultimate Edition 4X4
2004 Crossroads Cruiser CT30RL