Several municipalities across the DFW area have recently updated their enforcement of international energy conservation codes. These updates specifically target the R-value requirements for commercial and residential flat roofs during a full 'tear-off' and replacement.
In many cases, the minimum thermal resistance requirement has increased. This often means that simply replacing the membrane is no longer sufficient to meet code; additional layers of polyisocyanurate (polyiso) insulation may be required to reach the new standard.
Compliance and Costs
Homeowners and commercial property managers should be aware that these code requirements are mandatory, not optional. If a building department requires an upgrade to meet current R-values, the cost of the additional material should be factored into the initial project scope.
Most comprehensive insurance policies include 'Law and Ordinance' coverage. This specific provision can help cover the additional costs associated with bringing a roof up to current local energy codes following a covered loss, provided the policyholder has selected that endorsement.