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Can You Roof Over It? Layer Limits and Tear-Off Rules by Jurisdiction

Before you price a re-roof you need one answer: can a new layer go over the existing one, or is this a full tear-off? Jurisdictions answer it very differently, and the split does not follow state lines the way you would expect. Oklahoma is the cleanest case in the country — all sixteen Oklahoma jurisdictions we cover require a tear-off, not because each city decided so, but because the state did: the Oklahoma Uniform Building Code Commission amended IRC R908.3.1.1 to bar a re-cover “where the existing roof has one or more application of asphalt shingles,” a de facto statewide one-layer cap that individual cities cannot loosen. Texas sits at the opposite end, and Dallas is the outlier of the entire corpus: it amended the recover trigger UP from two layers to three, so a Dallas roof carrying two existing coverings may still legally take a third. Colorado is the most internally divided state we cover — sixteen of its jurisdictions require tear-off while twelve allow one overlay, so neighboring Front Range towns give opposite answers. Nebraska’s metro cities (Omaha, Bellevue, Papillion, and Douglas County by incorporation) deleted the roof-recover section from their adopted code outright. Kansas is stranger still: the Wichita–Sedgwick County Unified Building and Trade Code deletes the re-covering provision and enacts nothing in its place, so Wichita, Sedgwick County, Andover and Haysville have no local layer cap at all, while the Kansas City–side suburbs 200 miles away allow exactly two. Watch the conditional cases — Superior CO permits a single overlay only with an engineer’s report certifying the structure can carry the load, Golden CO allows one overlay but caps the combined weight at 750 pounds per square, and La Vista NE and Sarpy County NE bar overlays on asphalt specifically in hail-exposure areas. Every card quotes the jurisdiction’s own text; where a jurisdiction states no layer rule, we say so rather than inferring one. A layer limit is not the same thing as a repair-permit threshold — for how big a repair can get before it needs a permit, see the repair-threshold facet.