Short Answer
Ridge caps are specially designed roofing components installed over roof ridges and hips. They should be compatible with the roofing system and installed according to manufacturer requirements.
Detailed Explanation
Ridge caps are the shingles or components installed at the peak (ridge) and external corners (hips) of the roof where two roof planes meet. These areas are particularly vulnerable because they're at the highest point of the roof and exposed to wind from multiple directions. Purpose-designed ridge cap products are manufactured to provide proper coverage, sealing, and wind resistance at these critical areas. They're also designed to be compatible with the field shingles for proper aesthetic matching and warranty compliance.
Why It Matters
Ridge caps protect the most wind-exposed areas of the roof. Using improper materials or installation methods at ridges can lead to wind damage and leaks.