RoofStruct blogEstimating & materials
Every guide on estimates, waste factors, material takeoffs and supplier orders.
13 articles
Estimating & materials
A field guide to waste percentages by roof complexity — what 10% really covers, the cuts contractors forget to count, and a worked 32-square example.
Estimating & materials
Au Canada, la membrane d’avant-toit monte d’au moins 900 mm et dépasse le mur de 300 mm vers l’intérieur. Le calcul en mètres, avec un exemple chiffré au Québec.
Estimating & materials
Une soumission de toiture au Québec part d’une mesure en pi² et en carrés, ajoute la pente et les pertes, puis applique la TPS et la TVQ. Un exemple chiffré, ligne par ligne.
Estimating & materials
Most laminated shingles sold in Canada cover a square with 3 bundles; shake-look products often take 5. How to go from a measured Canadian roof to a bundle count you can order.
Estimating & materials
How Canadian roofers price a roof per m²: converting a per-square rate, which items go per lineal metre, and the taxes on the discounted subtotal, worked on a Québec quote.
Estimating & materials
Turn a measurement report into a price: order squares and edges into materials, labor with pitch and storey adds, tear-off, overhead, then margin done right, not markup.
Estimating & materials
Every line a re-roof needs, zone by zone: the edge length or count that drives it, what the measurement can't tell you, and how the list becomes a purchase order.
Estimating & materials
Shingles, underlayment, starter, drip edge, ice & water, cap, valley metal and nails: one formula per line, then a gable house with a dormer turned into a material list.
Estimating & materials
The formulas behind roof squares: pitch factor, true area, waste, bundles, drip edge, cap and valley metal, plus a pitch table and three shortcuts you can run on site.
Estimating & materials
Measure the roof, price it with your own material and labor rates, add overhead and margin. What's free, what's Pro, and the full math from squares to a number you can bid.
Estimating & materials
Eaves and rakes feed drip edge and starter, hips and ridges feed cap, valleys feed metal and ice & water, and area × pitch × waste becomes bundles. A worked hip roof.
Estimating & materials
A supplier-ready roofing order, line by line: what the yard needs, how each line comes off the measurement in the unit it ships in, and a worked 26-square example.
Estimating & materials
From measured squares and edge footage to a priced, tiered bid: material lines, per-square labor, margin math and Good / Better / Best tiers, with a worked 28-square example.
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