Good morning. I am a homeowner working with a large PA architecture/construction frm. Job (residential) involves second-floor addition wherein walk-out attic space is converted into a master bathroom suite by addition of a dormer. We are one week into construction. By Friday last the dormer was framed, plywood was on the new roof, and sections of the existing roof had been stripped back to plywood pending final tying in. Heavy storms were predicted over the weekend. My question (and please forgive me if this is off topic, but I need help!): what is the industry standard for temporarily weatherproofing an open roof? The builders placed Water&Ice on the new plywood and on the exposed existing plywood overlapping onto the untouched roof. They nailed furing strips onto the Water&Ice (I don't know whether nails were driven by hand or mechanically). No other protection was used and a tarp was not placed on the roof. The storm came and we suffered complete failure of the weatherproofing attempts -- water freely ran through the spaces between every sheet of plywood, travelled through the floor and damaged the rooms below. Obviously they failed in weatherproofing the dormer addition; my question is whether they made best and reasonable efforts by using Water&Ice only, or whether the industry standard calls for more aggressive and thorough coverings.

Any assistance you can offer would be *greatly* appreciated.

Regards,

Vanessa, DVM
Bryn Mawr PA