Drywall & Plastering Math: Wall & Ceiling Takeoffs, Boards and Waste, Studs & Tracks, Screws, Tape & Compound, Plaster Coverage, Crew Days and Quotes

What you'll build

What you will be able to do

Each lab ends with a concrete result that you build yourself and the checker confirms, cell by cell.

• Measure six fictional rooms: net wall areas with doors and windows deducted, ceiling areas only where the ceiling is lined, totals per floor with SUMIFS and the total area to line.
• Count boards for five fictional walls in two ways – a vertical layout with ROUNDUP in both directions and an area method with a waste allowance – measure the joint length per wall and price the difference between the two counts.
• Lay out five fictional partition walls: studs at a fixed spacing with INT + 1, extra studs beside each door, floor and ceiling track metres with the doorways taken off, stud metres and the number of track lengths to order.
• Look up the fictional screws per board for walls, second layers and ceilings, add a spare allowance, turn the total into whole boxes and work out what the fixings cost per square metre lined.
• Look up the number of coats for each fictional finish level, estimate tape metres and joint compound from rates on a fictional label and turn the compound into whole bags for the job.
• Turn a fictional plastering schedule into kilograms of material from area, thickness and label coverage, count bags per surface and compare them with a pooled order per product.
• Turn quantities and fictional production rates into whole crew days per stage, chain the stages with drying waits into start and finish dates with WORKDAY and price the crew time.
• Add overhead to the fictional cost lines of House 14, set the quote price from a target margin, convert it into the equivalent markup and chart where the money goes.