📏 Module 3: Demolition Takeoff & Quantity Measurements
🖥️ Manual vs. Digital Takeoff Methods
Estimators have more options than ever before when measuring demolition quantities. Choosing the right method can improve speed and accuracy.
- Manual Takeoffs: Use scale rulers, highlighters, and printed plans. Ideal for small projects or field markups.
- Digital Takeoffs: Use tools like Bluebeam, PlanSwift, or On-Screen Takeoff to quickly calculate square footage, volumes, and linear runs.
- Ensure correct scale is set and match plan legend with material types.
- Save digital snapshots or color-coded layers as proof of takeoff.
📌 Use a hybrid approach: manual for quick adjustments, digital for accuracy and documentation.
📐 Measuring & Quantifying Materials for Removal
Accurate material measurements are essential for calculating debris, labor, and hauling needs. Each building component has its own takeoff technique.
- Concrete slabs & foundations: Measure in square feet (thickness affects weight)
- Masonry walls: Measure in square or cubic feet depending on wall height & thickness
- Steel framing: Count beams, columns, and note section sizes
- Wood framing: Estimate board feet or lineal feet of studs, joists, rafters
- Interior finishes: Include drywall, ceiling tiles, flooring removal by square foot
🧮 Tip: Break down your measurements by room, area, or system for cleaner tracking and easier estimating.
⚙️ MEP System Removals
Mechanical, electrical, and plumbing system removals must be included in the demolition scope. Each system has different removal requirements and measurement methods.
- Ductwork: Measure in linear feet or pounds of metal (for salvage or scrap value)
- Electrical conduit & panels: Count fixtures, panels, breakers, and conduit length
- Plumbing: Include fixture counts and measure piping runs by material type (copper, PVC, etc.)
- Note ceiling vs. in-wall systems, access difficulty, and removal labor complexity
🛠️ Include a line item for system disposal fees or recycling credits where applicable.