Some people are surprised to discover that most commercial roofing is quite different from suburban roofing both in materials used and in overall structure. Of course, many business buildings, if not skyscrapers, are still quite tall in comparison to confidential homes and small to moderate sized residence buildings. Because of their height, we usually only catch sight of their roof areas from the windows of other near buildings of similar heightâ€"other commercial buildings, hotels, or large apartment or condominium joined parts. Yet, even a quick glance reminds us that commercial real estate roofing is very dissimilar in its construction and composition from other types and types of roofing. A commercial roofing contractor deals with a large and detailed blueprint or mapped plan when beginning roof construction on a tall office building, lodge or condominium complex. First of all, the total roofing part to be finished is much larger than that of small to moderate sized residential structures. For this reason, commercial roof design calls for heavier, sturdier and more tough materials than does most residential roofing. The beginning stages of commercial roof construction usually start with concrete bases being poured (or if pre-poured, carefully laid) to fit with the building structure's top steel beaming and pre-roofing surface. In contemporary hotel and condominium roofing construction, often smooth slate sheeting or pleasing tiling is used for the final exterior roofing surfaceâ€"especially if the architectural drawing calls for a roof garden installation. However, in roof construction of commercial buildings for which the roof will only be handy to building maintenance workers when needed, the final roofing surface is often a moderately broad layer of tarring to prevent any accumulation of water or moisture from damaging the internal roofing. Of course, the issue of drainage had already been dealt with by the building architects, engineers and other designers, so necessary water drains and pipes have already been installed. Because of their complete accessibility to all types of weather conditions, all areas of commercial roofing installation must be completely sealed and protected from water injury. Since commercial roofing construction is completed in larger sections at a time than is most residential roofing, insuring an air and water-tight setting up is crucial to the long-term survival of both roof and building, with less commercial roof repair needed. In general, commercial roof repair is done is larger segments at a time than is residential roofing repair, and sometimes whole sections of a elevated office building are replaced, rather than a single small damaged segmentâ€"with the applied reasoning being that it will be more cost successful to replace the whole segment now rather than wait for further damage and repair each small section as needed. Also, since the majority of residential structures are decidedly smaller than their commercial opposite positions, and residential roofing (whether tiles, shingles or tar roofing), can easily be repaired or replaced in small segments, whenever there is deterioration or damage, the equipment needed for residential roofing repair is much smaller and less costly that that used in most commercial roofing repair. The same is true for the maintenance workers needed, since often residential roof repairs can be completed by one or two workmen in a short length of time. While one major concern of a commercial roofing outworker, during both commercial roof installation and repair, is assuring the strength and water-tightness of the flat roofing surface, many private residences and apartment buildings have slanted, inclining, or even garret roofing with marginal gutters and drains to eliminate problems from water accumulation. For water, steam and air release, commercial roofing must always include and maintain clear, unobstructed vents, drains, and submerged (or underlying) piping. These vents are necessary for proper operation of heating, cooling and freshening systems within commercial buildings while helping to protect underlying and surface roofing materials. Well installed and repaired roofing is similarly important in both residential and commercial roofing, although very different in nature and maintenance needs.
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