SENTINEL Membranes and Roofing Services is the Premiere Commercial Roofing Contractor servicing the GTA. Fully Licensed, Insured, Bonded and established. We specialize in I.C.I. flat roofing projects including, 24 Hour Emergency Repairs, Complete and Partial Retrofits and New Build Construction. Whether single ply TPO, PVC, EPDM or tradtional 4 ply buildup, you can Rest Assured...SENTINEL Is On Top Of It . Call us Toll Free 1-844-323-3013 , visit us on Facebook or at www.sentinelmembranes.com for a No Charge, No Obligation quote. more... See more text