It’s certainly an appealing option to get a new roofing system and the same warranty coverage at a lower cost with a roof recovery, however, it’s not always possible. We’ll show you 3 situations where a ‘recovery system’ is not possible and a complete tear off and replacement is required…as noted in Chapter 15 of the Florida Building Code, section 1510.3.
When Two Roofs Already Are Installed: Florida Building Code allows for a second, ‘recovery’ roofing system, but two is the maximum. That means, if you already have two roofs installed (original roof plus a roof recovery system), Florida building code specifically states that “new roof coverings shall not be installed without first removing all existing layers of roof coverings down to the roof deck”. Therefore, if you are budgeting for a new roofing system in the future, make sure you know whether you have one or two roofs installed, which can vary the price of the roof replacement by as much as 40%. RAMCON can assist you in determining this by calling (877) 726-2661.
Roof Saturation: If the existing roofing system is wet/saturated, building code will require it to be completely removed and an entire new assembly installed. In some instances, we can remove only isolated wet sections, however after a certain percentage is deemed unsatisfactory, a complete removal becomes more cost effective and possibly even required. Fix leaks as quickly as they develop and get involved with RAMCON’s preventative maintenance programs…it’ll save significant sums when your roof comes to the end of its service life.
Wind Uplift Ratings: Certain types of roof decks simply may not be able to have a new roofing system installed over the original, such as gypsum or structural concrete decking systems. This actually has little to do with the decking itself, it’s the roof on it that matters! You typically ‘adhere’ the systems to the deck with either an adhesive (TPO/PVC) or asphalt (BUR/Modified). Therefore, to install a new roofing system, you have to adhere to the existing roofing system and rely on its existing wind uplift. Since Florida Building Codes are increasingly more stringent, the existing roof may not meet today’s wind uplift costs. To test the wind uplift of the original roof to determine if it is suitable to act as a substrate for a recovery roof, we are required to perform a ‘bell chamber’ test to simulate a wind uplift scenario to determine conditions. It’s extremely rare to see a system over a gypsum deck meet these requirements.
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ReplyDeleteStone lintels have been used to support roofs since prehistoric times, but cannot bridge large distances. The stone arch came into extensive use in the ancient Roman period and in variant forms could be used to span spaces up to 140 feet (43 m) across. The stone arch or vault, with or without ribs, dominated the roof structures of major architectural works for about 2,000 years, only giving way to iron beams with the Industrial Revolution and the designing of such buildings as Paxton's Crystal Palace, completed 1851.
The materials used to replace or repair your Tewksbury roof must be of the highest quality. With Budget Exteriors, you can guarantee that our large selection of roofing materials and products are up to par. Choose from asphalt, rubber and slate. If you are unsure which roofing material will best suit your home, a Budget Exteriors representative will gladly walk you through each option.
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