South of Market Torch Down Modified Bitumen Roofing

Tile on a South of Market property outlives its underlayment by decades, and the underlayment is the part doing the waterproofing. Low-slope sections on South of Market buildings need a membrane or coating system rather than shingle laid flatter than it is rated for.

Repeat stains in the same South of Market ceiling after every storm point at flashing rather than the field. Soft spots underfoot on a South of Market roof mean the sheathing has taken water and needs replacing.

Composition shingle is the most common covering in South of Market and typically runs fifteen to twenty-five years here. Low-slope sections on South of Market buildings need a membrane or coating system rather than shingle laid flatter than it is rated for.

Final clean-up on a South of Market property includes a magnetic sweep for nails before the crew leaves. Flashing at every penetration is replaced rather than reused on a South of Market roof.

Supplements are normal once a South of Market roof is opened up, and they should be raised with evidence attached. Policies on South of Market properties pay for sudden damage and not for age, so the report has to separate the two.

Thermal cycling does the quiet damage in South of Market — hot afternoons, cool nights, materials working against their fixings. South of Market takes its rain in short heavy bursts, so drainage that sat dry collecting debris has to move everything at once.

Repair makes sense on a South of Market roof with life left and one localised failure; beyond that it is money spent twice. Cost on a South of Market roof comes down to size, pitch, how many layers come off and the state of the deck underneath.

A dated maintenance record on a South of Market roof also helps at claim time, because it shows the failure was sudden. Two visits a year keeps a South of Market roof honest: clear valleys and gutters before the rains, check flashings after the first storm.