Haag Engineering has published numerous papers regarding roof repair methods and they continue to be the worldwide leader in roofing technologies. To find out more about Haag’s roofing expertise, follow this link: http://haagengineering.com/areas-of-expertise/roofing/
Listed below are just of few excerpts from Haag Engineering published papers. These are direct quotes:
National Roofing Contractors Association Sponsored
Paper: PROTOCOL FOR ASSESSMENT OF HAIL-DAMAGED ROOFING
Timothy P. Marshall and Richard F. Herzog, Haag Engineering, Carrollton, Texas, USA
“There are many types of repairs that can be done on asphalt shingle roofs that have limited hail damage. One option is to remove and replace the damaged shingle. Shingles sealed down with an adhesive strip will have to be unbonded before the fasteners are removed in the damaged shingle, as well as in the overlying shingle. When new shingles are installed, dabs of asphalt plastic cement can be used to seal the new shingles to the original shingles and cover the old nail holes. If the shingle color cannot be matched or the damaged shingle adequately removed, a surface repair can be made with asphalt plastic roof cement and shingle granules.”
Proceedings of the Fourth International Symposium on Roofing Technology
Paper: HAIL DAMAGE TO ROOFING: ASSESSMENT AND CLASSIFICATION
William C. Cullen, National Roofing Contractors Association, Washington D.C. USA
“Maintenance and repair options for hail damage are very broad. Just as damage is roof-system specific, maintenance and repair alternatives are also roof system specific. Repair decisions must follow after analysis of data from visual observations and test results. The significance and degree of damage will determine the remedial techniques required. These options include spot repair, recoating, recovering the damaged areas and, in extreme cases, reroofing of the damaged system. The economics of repair vs. reroofing should dictate the choice”
Proceedings of the North American Conference on Roofing Technology
Paper: LONG-TERM EFFECTS OF HAIL IMPACT ON ASPHALT SHINGLES
Scott J. Morrison, Haag Engineering, Carrollton, Texas, USA
“Some impacts made with freezer ice on laminated shingles dislodged granules from exposures without exposing asphalt. Granules subsequently were shed at impact locations over time with natural weathering. Careful examination at these locations revealed a continuous bed of granules immersed in the asphalt. There was no reduction in the expected service life of the shingles as granules on the shingles continued to protect the underlying asphalt and reinforcement. The condition was not functional damage but merely a cosmetic condition”.
These papers can be found in their entirety by visiting the Haag Engineering website at:
http://haagengineering.com/technical-papers/