How much clearance is recommended between the ends of vinyl siding panels and trim?

The recommended clearance between the ends of vinyl siding panels and trim is 1/4 inch. This spacing allows for proper expansion and contraction of the vinyl material due to temperature changes. Vinyl siding can expand significantly in warm weather and contracts when temperatures drop. If the panels are installed too tightly against the trim, this can lead to buckling, warping, or other issues as the material tries to expand.

Having a 1/4 inch gap provides a buffer that helps to accommodate this movement while also ensuring that water can properly drain away from the siding, reducing the risk of moisture-related problems. This guideline is part of best practices in siding installation and contributes to the longevity and integrity of the building envelope.