Tar & Gravel roofs have been around for centuries. They are composed of layers of perforated felt or fiberglass material with asphalt in between, flooding the top with asphalt and applying gravel to the hot asphalt. Contact Eastman Roofing to discuss your tar & gravel roof repair today!flat roof repair – How to Repair a Leaky Rubber Roof – DIY Guide. Leave a reply.. When the membrane is completely dry, apply the appropriate roof repair material such as roof cement, tar or peel and stick patch. Some roofers also suggest using 6d roofing nails to secure the blister flaps.You can easily repair, clean and seal these to prevent further damage. numerous sealants are available for each type, whether it be metal, wood or an asphalt roof. follow the manufacturer’s.HomeAdvisor’s Roof Repair Cost Guide gives average costs to fix a roof by common type of repair, including roof leaks, sagging roofs and missing shingles. Compare costs by material: flat roof, metal, asphalt, tile and more. Find all cost factors.When the time comes–about once every 15 years for the average asphalt (or composition) shingle roof–you should certainly make the. buy an extra bundle or two to keep around the house for repairs.A flat roof is usually slightly sloped. It may be covered with a granular roll roofing, EPDM (which is smooth surfaced), or modified bitumen (which may be smooth or mineral surfaced). Some flat roofs have hot tar built-up roofing, which may have a gravel surface. If you live in an arid region or an older urban area, you may have a large flat roof.Spreading roofing tar works best where the shingles are leaking around flashing. It works best to fill cracks and holes, but it is also used to repair warped or bent shingles. Place a silicone bead.To repair a roof or not, that is the question. Actually, the question is based on whether the cost is worth doing it now, or waiting a while. In which case, it is more like a gamble. And a wager that each home owner makes virtually every day. Yet, when an obvious problem comes up, such as water.