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CalcWolf DIY Calculadora de Molduras/Sancas
DIY

How Much Crown Molding Do You Need?

Calculate linear feet of crown molding plus inside and outside corner pieces. Includes waste factor for mitered joints.

📅 Updated April 2026 Formula verified 📖 4 min read 🆓 Free · No sign-up

O Cálculo

Metros lineares = perímetro do cômodo + 10% para perdas e erros de corte. Quarto de 4×5 m: 18 m + 1,8 = 20 m. No Brasil, as opções mais populares: isopor/poliestireno (R$5-20/m), gesso (R$15-40/m) e poliuretano (R$20-60/m). Isopor é de longe a opção mais prática e econômica.

Instalação

Isopor: cola de contato, corte com estilete. Gesso: cola e parafusos. O isopor pintado fica indistinguível do gesso a 2 metros de distância — pelo custo de 1/3.

⚡ CalcWolf Insight

Use construction adhesive (Liquid Nails) in addition to nails when installing crown molding. The adhesive holds the molding tight to the wall and ceiling while the nails dry, preventing gaps. It also reduces the number of nails needed, meaning fewer holes to fill.

Frequently asked questions
Quanto para quarto de 4×5?
18 m + 10% = 20 m. Isopor: R$100-400. Gesso: R$300-800. Poliuretano: R$400-1.200.
Isopor ou gesso?
Para custo-benefício: isopor (R$5-20/m, fácil de instalar). Pintado, ninguém nota a diferença.
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Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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