Hi, A bit of background, I work in Atlanta GA as an architect on schools, typically on renovations/additions at approx. 10-30,000 SF, but also new schools with approx 100-150,000 SF. As an architect, I rarely have to deal with the nitty-gritty of pricing adds or changes, and in house we have RSMeans 2016, as well as flooring manufacturer reps that come in with (usually low) expected materials+installed costs that we can expect for their products. 90% of our work is VCT, with gym floors and admin/media center 2x2 carpet tile thrown in the mix. So why I've joined, we have a county that expects all GC Potential change orders to provide backup showing all material line item adds and all man-hour at pervailing wage/hr adds to the job. A school came back with a moisture issue (99% RH) on 4 of the 6 phases (no vapor barrier, built in the 70s) at 24,168 SF of affected VCT. VCT replacement is all the school corridors, so working around lockers in place, no base at lockers, base at walls, working to the existing VCT in classrooms and leaving classroom VCT in place. We've gone through a number of products that the flooring installer and Architect recommended for a moisture barrier that the county rejected (too costly) and settled on the owner recommendation, Stauf R701, a urethane that according to the cutsheet, can be installed up to 90% humidity, but the owner called Stauf directly and got them to approve it for our school... I know... We also worked directly with the 3 crews from 3 installing companies that were subbed from the finishing subcontractor, since they were not familiar with Stauf R701, to see how long it took them extra to do the work and come up with a reasonable add. So, the original cost on the job is approximately $3.10 labor and materials assuming no moisture mitigation. Swapping out the specified glue (your standard stuff, lay it out until it's tacky and go to town, come back and do the edges) with Stauf R701, They've added another $1.80, for a total cost of $4.90 for VCT install with moisture-resistant urethane. Now I'm thinking this is a good price, especially after watching the guys lay a couple hallways, but honestly I have no idea as this isn't my daily job, and the best I have is RSMeans to go for. They had to lay it "wet" so getting started seemed to be a big hassle, and if they let the R701 tack up, it became useless, so they had to cut their edges with a separate team, "as they went". Furthermore, asking around the office, I'm getting prices of $6-7/SF for moisture mitigation barriers... though this isn't a barrier per say. The county thinks the number should keep going down, but I feel like I'm squeezing blood from a stone at this point and the installers have been doing a good job to this point. Is the county being a Scrooge, or am I way off? I appreciate your guys' expertise on this.