Swathed in pink, fluid-applied PROSOCO R-GUARD Spray Wrap Air and Water Barrier, this is the North Carolina State Bar Building in Raleigh.
This is not to be confused with the North Carolina Bar Association in Cary, N.C., the group that lobbies for and provides professional support to its members. This building will house the regulatory agency for the state’s legal profession.
The agency has run out of room in its current building, according to Executive Director Tom Lunsford, quoted in an article in the Triangle Business Journal, Raleigh, N.C.
CJMW Architects, Winston-Salem, have designed a building they and its owners hope will achieve LEED Gold certification. That’s perhaps one reason for the energy-saving PROSOCO R-GUARD Air & Water Barrier — but not necessarily the main reason, says installer Jim Sherrife, East Coast Restoration and Waterproofing, Concord, N.C.
Ease of use in a confined area” was the main reason for choosing the R-GUARD system, Jim said.
Other fluid-applied primary air-barrier products being considered would’ve had to be sprayed on with powerful equipment to get a 90-120 mil thickness. In circumstances like that, overspray is a distinct possibility, Jim said.
“We would have had major problems,” Jim said. “We had parking and traffic just 50 feet from where we were working.”
Those heavier fluid-applied products could have been applied with rollers to prevent overspray, Jim said. But the multiple applications needed
to make 90-120 mils would have been too time-consuming.
So a custom PROSOCO R-GUARD system with R-GUARD Spray Wrap as the primary air & water barrier got the nod.
“Nothing complicated about it,” Jim said.
Jim and crew applied the Spray Wrap 10 mils thick with low-pressure sprayers and no danger of overspray. The water-resistive barrier is durable, continuous, seamless, and vapor-permeable. It can be exposed to sun, wind and rain for up to six months before the cladding goes up, in case of construction delay, as opposed to 30 days maximum for most other products.
Before the Spray Wrap could go on, seams, screwholes, wall-to-roof and foundation-to-wall transitions and rough openings had to be made water- and air-tight. Peel-and-sticks make this incredibly complicated, Jim said. Getting these features detailed correctly involves time-consuming priming, cutting and shaping. There’s plenty of chances for human error, any one of which can result in water getting into the building envelope.
When that happens, damage and lawsuits result. And it happens often, if the multi-billion dollar construction litigation industry is any clue — more than 70 percent of which is due to water intrusion, according to Architect Magazine.
Jim sealed these vulnerable points in the building envelope with breathable, waterproof R-GUARD products Joint & Seam Filler and FastFlash. The ease of installation compared to detailing with peel and stick membranes let him stay far ahead of the limestone and window installers, he said.
“We finished way ahead of schedule,” Jim said. “I wish we could use FastFlash on every air barrier job.”