Quick Answer: A siding takeoff measures every siding surface off the elevations and wall plans in SF, converts to squares (100 SF), sizes underlayment, and measures soffit, fascia, corner posts, and trim in LF. CyanBuild reads your siding drawings, pulls each of those quantities off the scaled sheets, and ties every line back to the elevation it came from, with a confidence flag on every measurement so your estimator knows what to verify.
Siding takeoff is the process of measuring every quantity on a siding plan, the units your trade actually bills on. Done by hand it means tracing each wall surface off the elevations with a scale wheel and subtracting openings, which is slow and error prone on a complex elevation. AI reads the same sheets in seconds and reports the same quantities, with the math shown for every number. The result is a line item takeoff tied back to the elevation and location it came from, so your bid is defensible and your material order is accurate.
What Trade Specific Takeoff Means for Siding
Siding sits under CSI Division 07 00 00, Thermal and Moisture Protection, and the quantities come off the elevations and the wall plans, not the floor plans. That is the first thing that makes siding takeoff different from a trade like flooring that reads off the floor plan. A siding estimator works in SF of wall surface, converted to squares (100 SF) for material pricing, and in LF for the trim package that goes with it. A trade specific takeoff understands that vinyl siding is billed in squares while corner posts and J channel are billed in LF, and that the soffit and fascia are a separate package tied to the roof edge, not the wall.
Trade specific takeoff also understands that siding is measured off the elevation, not the plan view. A wall that is 40 feet long on the plan and 10 feet tall is 400 SF of siding, minus the openings. But the elevation shows the gable, the window and door openings, and the wall height, all of which the plan view hides. A trade aware takeoff reads the elevation, subtracts the openings, and adds the gable area, not just the rectangle. Generic tools that measure wall area off the plan view miss all of that.
What Counts on the Drawings
On a typical siding plan set, the quantities you need to pull are: siding SF by wall and material (vinyl, fiber cement, wood, metal, stucco), converted to squares, underlayment or house wrap SF, soffit SF and LF by the roof edge, fascia LF by material, corner posts LF (inside and outside), J channel LF by location, window and door trim LF, flashing LF, starter strip LF, and any trim coil or sealant. Each opening on the elevation has to be subtracted from the wall SF, and the gable area has to be added where the wall extends above the plate.
The elevations carry the wall height, the openings, and the gable shape, with the siding type called out in the notes. The wall sections or the details give the soffit depth and the fascia size. When the elevation and the wall section disagree on the soffit depth, the estimator has to decide which to trust. That decision is where a lot of siding bids lose money, because the soffit and fascia package is priced by the LF and a wrong depth means wrong material.
What Good Takeoff Software Does for This Trade
Good siding takeoff software reads the scaled elevation, measures each wall in SF, subtracts the openings, and adds the gable area, then converts to squares. It sizes the underlayment in SF from the wall area. It measures soffit and fascia in LF along the roof edge, with the soffit depth pulled from the wall section so the SF is right. It pulls corner post LF by inside and outside corner, because the two are different materials and different costs, and J channel LF by location, because the J channel around every opening adds up fast on a wall with a lot of windows.
A capable tool also handles the things that quietly eat siding margins. It subtracts the openings from the wall SF instead of pricing the gross wall, because pricing a 3 by 5 window as siding is a quick way to over order. It flags gable walls where the height is assumed, not dimensioned. And it keeps every quantity tied to the elevation and the location it came from, so when the elevation is revised you can see what moved instead of redoing the whole sheet.
Must Have Features
- Scaled SF off the elevations. The tool has to read the scale bar and report wall SF off the elevation, not the plan view. Without the elevation, the gable and the openings are guesses.
- Opening subtraction. The tool has to subtract every window and door from the wall SF. Pricing openings as siding is a common way to over order.
- Squares conversion. Siding is billed in squares (100 SF). The tool has to convert SF to squares so you can price it without doing the math by hand.
- Soffit and fascia in LF with depth. The tool has to pull the soffit depth off the wall section so the SF is right, and report fascia LF by material.
- Corner posts and J channel split. Inside and outside corners are different costs, and J channel by location adds up fast. The tool has to keep them separate.
- Confidence flags on every line. Every measurement should carry a High, Medium, or Low confidence flag, with the math shown on low confidence items so your estimator can verify in seconds.
- Export tied to elevation and location. The takeoff has to leave the tool in Excel or PDF, with every quantity traceable to the elevation it came from.
What to Watch Out For
Most generic takeoff tools measure wall area off the plan view and stop there. That misses the gable, the openings, and the soffit package, which are typically a third of the material cost on a siding job. If the tool you are evaluating only reports plan view wall SF, you are still going to be tracing elevations by hand, and that defeats the point of paying for software.
Watch for tools that do not subtract openings. A takeoff that prices the gross wall will over order siding on every elevation that has windows or doors, which is every elevation. The same goes for soffit depth. If the tool uses a default depth instead of reading the wall section, the soffit SF will be wrong on every job that does not match the default.
Watch for tools that lump corner posts and J channel into one trim LF number. Inside and outside corners are different materials. A tool that does not split them leaves you counting corners by hand. And watch for tools that do not tie quantities to the elevation. When the elevation is revised, you want to see what moved, not redo the whole sheet.
How CyanBuild Fits
CyanBuild reads your siding sheets, measures every siding surface off the elevations and wall plans in SF, converts to squares, sizes underlayment in SF, and measures soffit, fascia, corner posts, and trim in LF. The materials AI identifies include vinyl, fiber cement, wood, and metal siding, house wrap and underlayment, soffit and fascia material, corner posts and J channel, flashing and sealant, and trim coil. Each line item carries a confidence flag so your estimator knows which walls to verify. Export to Excel or PDF, with every quantity tied to its elevation and location, ready for pricing and bid.
Putting It Together
A siding bid is only as good as the elevation takeoff behind it. When the takeoff only reports plan view wall SF, you are left to trace the gable and the openings by hand and count corners by eye. When the takeoff reads the elevation, subtracts the openings, adds the gable, and splits the trim package, the bid is defensible and the order is accurate. That is the gap CyanBuild is built to close.