Quarrix DryRoof Roof Battens provide superior protection that ensures proper water drainage and airflow under composite, concrete and clay tile. Install directly to the roof deck to elevate the roofing material to keep the roof deck properly ventilated. Engineered with small air channels allowing water drainage and airflow to the roof deck to stay dry and prevent rot. Constructed of HDPE plastic, DryRoof Roof Battens are resistant to warping, splitting, mold and mildew, a longer lasting alternative to wood battens. When building a roof with synthetic, composite, concrete or clay materials it's imperative to have a strong batten system that can support and last the life of the roof.