Board-up / temporary secure
Openings and LF.
Openings and LF.
A fire-damaged structure with open windows and doors has to be secured before anything else, and that emergency board-up is a scoped, billable line. Enter the number of openings and their average width and height, and this calculator returns plywood SF, the count of 4×8 sheets to buy, and the framing lumber in linear feet. Reach for it when you're writing the emergency-services portion of a fire scope and need defensible material quantities to secure the openings.
Plywood SF is openings × average width × average height. Sheets are that SF divided by 32 — one standard 4×8 sheet is 32 SF — rounded up to whole sheets. Framing LF allows perimeter bracing on every opening: openings × 2 × (width + height), which is two runs around each opening's perimeter for backing and bracing. So three 3 × 5 openings is 45 SF of plywood, two sheets, and 48 LF of framing. Enter averages that reflect the mix of windows and doors on the structure; oversized or irregular openings are worth measuring individually.
Mensuria writes a neutral scope built to survive review — every line item sourced to a photo, anything unprovable held back and flagged for you. It never files the estimate; a licensed adjuster confirms every line and stays the adjuster of record. Mensuria is independent and not affiliated with Verisk or Xactimate; “Xactimate-ready” means the worksheet is organized for Quick Entry.
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Field photos and a few measurements in; a defensible, Xactimate-ready scope out — every line item sourced to the photo that supports it.
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Multiply the opening's width by its height for the coverage, then divide the total across all openings by 32 to get 4×8 sheets, rounding up. A single 3 × 5 window is 15 SF, so one sheet covers it with cutoff to spare. Several openings pool onto shared sheets, which is why the calculator sums all openings before converting to sheets — you buy whole sheets, not fractions, so a few small openings may still round up to the next full sheet.
Plywood alone doesn't secure an opening — it needs backing and bracing so it can't be pushed or pried in. The framing LF here allows two runs around each opening's perimeter for that bracing, keyed as openings × 2 × (width + height). That gives you a defensible lumber quantity alongside the plywood so the emergency-secure line reflects the real materials, not just the sheet goods. Skipping the framing under-scopes the labor and material it actually takes to secure a structure.
Emergency measures to protect the property from further damage are typically covered, and securing open or broken openings after a fire is a standard emergency-services line. Scope it separately from the permanent repair so the mitigation and reconstruction phases stay clean in the file. This calculator gives you the plywood, sheet, and framing quantities to support that line — document the openings with photos so the board-up is sourced to what you actually secured.
For a mixed set of windows and doors, enter an average width and height that reflects the group and let the count carry the total. When one or two openings are much larger — a wide slider, a garage or entry opening, a blown-out wall section — figure those separately and add them, rather than skewing the average. The goal is a material order that covers every opening; measuring the outliers on their own keeps the plywood and framing quantities honest.
HEPA and wall/ceiling SF.
Debris volume.
Poly on framing plus airlock.
Dimensions to SF and perimeter.