What is a drip cap?

A drip cap is an L-shaped or angled metal or vinyl trim installed at the top of windows, doors, and other wall openings. Its sloped design directs rainwater down and away from the wall surface rather than allowing it to pool or run down behind the trim and into the wall cavity. Water that penetrates behind windows and doors is one of the leading causes of hidden rot, mold, and structural damage in homes.

In Lake County's humid climate, where heavy seasonal rains are common, proper water management around openings becomes even more important. Without a drip cap, water can wick into the wood framing or insulation behind the trim, creating conditions for decay that may not be visible until significant damage has already occurred. Replacing rotted framing is far more expensive and disruptive than installing or replacing a failed drip cap during initial construction or renovation.

Drip caps are typically installed under the top brick mold or flanged frame of a window or door before the outer trim or siding goes on. They work best when combined with proper caulking and flashing systems. If your existing drip caps are cracked, bent, missing, or pulling away from the wall, water leaks are likely occurring. Having a siding repair specialist inspect and repair or replace compromised drip caps can prevent costly interior water damage and extend the life of your home's exterior.