Quick Answer: Waterproofing takeoff means measuring every waterproofed surface in square feet, sizing the membrane by type, measuring sealant and flashing in linear feet, and sizing drainage mat and accessories. Good software reads the plans and the details, pulls the surface area off the scaled drawing, separates horizontal from vertical, and gives you a defensible takeoff tied to each sheet and location.
What Trade Specific Takeoff Means
Waterproofing sits in CSI Division 07, and it is one of the few trades where the same square foot can price three different ways depending on the membrane and the substrate. A takeoff that gets the area right but the membrane type wrong will be off on every line. Trade specific takeoff for waterproofing means the software understands that a below grade foundation wall takes a fluid applied or sheet membrane, a plaza deck takes a protected membrane system, and a shower pan takes a pan liner, and each of those is a different unit price.
Generic area tools will tell you there are 8,000 square feet of waterproofing on a project. A waterproofing takeoff tool tells you there are 4,200 square feet of below grade sheet membrane on the foundation walls, 1,800 square feet of protected plaza deck membrane, 600 square feet of fluid applied shower pan liner, and 1,400 square feet of drainage mat. That is the difference between an area and a takeoff, and it is the difference between a number and a bid.
What Counts on the Drawings
Waterproofing quantities live on the foundation plans, the roof and plaza plans, the wall sections, and the detail sheets, and they are shown with notes, hatching, and membrane callouts rather than dimensions. The pieces you have to pull include below grade wall and footing waterproofing, plaza deck and roof waterproofing, shower and wet area waterproofing, planter and pool waterproofing, and expansion joint and crack sealant. You also have to track the membrane type, because sheet, fluid applied, self adhered, and cementitious do not price the same per square foot.
The sections and details carry as much information as the plan. The wall section tells you whether the membrane is on the outside or the inside, how many plies, and where the termination bar sits. The plaza detail tells you the protection board, the drainage mat, and the wearing surface. The shower detail tells you the pan liner, the wall membrane, and the curb. A good takeoff reads the plan and the details together, because a hatched area on the plan means nothing without the detail that sets the membrane type.
Sealant, flashing, and drainage are separate lines that get missed. Sealant and joint filler are measured in linear feet off the expansion joint plan and the wall sections, flashing and termination bars are linear feet off the details, and drainage mat and drainage inlets are square feet and counts off the plaza and foundation details. A takeoff that ignores those lines underprices the work that runs alongside the membrane.
What Good Takeoff Software Does for This Trade
Good waterproofing takeoff software reads the plans and the details, recognizes the membrane callouts and notes, pulls the surface area off the scaled drawing, and separates horizontal from vertical because they are priced and installed differently. It treats the membrane type as data, so a callout that says 60 mil sheet membrane becomes a line priced at the sheet rate, not a generic square foot line. It separates membrane from drainage, because drainage mat sits on top of the membrane and is its own line.
Confidence flags matter on waterproofing because the membrane type drives the price and the type is read off small detail text. A fluid applied membrane misread as sheet changes the price and the labor on that line, and a missed termination bar means the flashing was never priced. Software that flags low confidence on a membrane callout and shows you the detail it read lets you verify the risky lines before the bid.
Must Have Features
- Surface area off the scaled plan. The software must pull square feet of membrane off the foundation, roof, and plaza plans, and separate horizontal from vertical, because they are priced differently.
- Membrane type reading. It must read the membrane callout, because sheet, fluid applied, self adhered, and cementitious do not price the same per square foot and do not install at the same rate.
- Detail reading. It must read the wall sections and plaza details for plies, protection board, and termination, because the plan alone does not tell the full story.
- Sealant and flashing in linear feet. It must measure sealant and joint filler off the expansion joint plan and flashing and termination bars off the details, because those are unit priced lines.
- Drainage mat and accessories. It must size drainage mat in square feet and count drainage inlets and accessories, because drainage is a real line on every plaza and below grade bid.
- Confidence flags with the callout shown. High, Medium, or Low on every line, with the membrane callout the software read displayed so you can verify the risky items fast.
What to Watch Out For
The biggest trap in waterproofing takeoff is software that gives you a square footage and calls it a takeoff. If the tool measures area but cannot read the membrane type, you still have to break the area out by type by hand, and that is where most estimating errors happen. Another trap is tools that ignore the details, because a hatched area on the plan could be a single ply or a two ply assembly, and the price is not the same.
Sealant and flashing are common gaps. Some tools measure the membrane area fine but never pull the sealant or the termination bar off the details, and those linear foot lines get missed entirely. Drainage mat is another gap, because it sits on top of the membrane and is its own square foot line, and a takeoff that misses it misses a real chunk of the plaza and below grade bid. Finally, watch for tools that do not show their work. A square foot number with no membrane callout or detail behind it is a number you cannot defend in a bid review.
How CyanBuild Fits
CyanBuild reads the waterproofing plans and details, measures every waterproofed surface in square feet, separates horizontal from vertical, sizes the membrane by type, measures sealant and flashing in linear feet, and sizes drainage mat and counts drainage inlets. Every line carries a confidence flag and the callout it was read from, so you can verify the risky lines and defend the rest. The export is a line item takeoff tied to sheet and detail, ready for pricing.
Putting It Together
Waterproofing is a type trade, so the software you pick has to read the membrane type, not just measure the area. It has to separate horizontal from vertical, pull sealant and flashing off the details, size the drainage, and show the callout behind every number. Get those things right and your bid is defensible, your membrane order matches the drawings, and the only surprises on the job are the ones the substrate hides.