All roof tiles manufactured over the past decade come with a 50 Year structural performance guarantee that the tiles will not warp, become porous, corrode or be affected by salt or frost.

All roof tiles manufactured over the past decade come with a 50 Year structural performance guarantee that the tiles will not warp, become porous, corrode or be affected by salt or frost.... All roof tiles manufactured over the past decade come with a 50 Year structural performance guarantee that the tiles will not warp, become porous, corrode or be affected by salt or frost.