Dry fix sealing and ventilating of roof space Envirotile ventilated ridge and aluminium hip rolls are used as part of a dry fix ridge and hip system to protect the roof from water ingress whilst allowing it to breath. Both roll types feature a highly malleable corrugated aluminium skirt that can be dress over roof tile for optimum seal. Whilst the Ridge Roll has a polypropylene mesh that allows the ridge to breath the Hip Roll is fully aluminium to better protect the hip against water ingress. Features & Benefits Ventilates the roof ridge 5mm continuous airflow Easy to form over tiles malleable corrugated aluminium Sticks securely to roof high butyl adhesive strips Easy to fit staplenail to ridge and self stick to tile Universal product use with any dry fix system Use with Envirotile Ridge and Hip caps to complies with BS 5250 BS 5534 and DIN 41083 as part of a dry fix system that is resistant to the affects of freezethaw cycles and thermal expansioncontr...