Calculadora de Espuma en Aerosol — ft, sq ft, cost
Como usar esta calculadora
Elija el tipo de espuma, ingrese el area de la superficie (o largo del muro × alto), establezca el espesor objetivo o Valor R objetivo, y especifique la profundidad de cavidad. La calculadora calcula pies tabla (1 bf = 1 ft² a 1″ de espesor), kits necesarios, Valor R alcanzado y si se requiere una barrera de vapor por separado.
Celda abierta — R-3.7/in, 0.5 lb/ft³. Necesita barrera de vapor por separado.
Celda cerrada — R-6.5/in, 2.0 lb/ft³. Actua como barrera de vapor a ≥ 2″ de espesor.
Calculos guardados
| Hora | Tipo | Area ft² | Thick | BF | Kits | R-Value | Cost |
|---|
How to Calculate Spray Foam Insulation
Spray foam insulation is measured in board feet (bf). One board foot = 1 ft² of coverage at 1″ thick. Multiply the surface area by the thickness in inches to get the total board feet. Spray foam comes in kits rated by board feet: 200, 600, and 1,200 bf are common sizes.
Formulas
Board feet = area (ft²) × thickness (in). From R-value: thickness = target R / R-per-inch. Open-cell: R/in = 3.7, density 0.5 lb/ft³. Closed-cell: R/in = 6.5, density 2.0 lb/ft³. Weight = area × (thickness/12) × density.
Preguntas frecuentes
Open vs closed cell? Open-cell is cheaper, expands more, good for sound dampening, but needs a vapor barrier. Closed-cell is denser, stronger, acts as its own vapor barrier at ≥2″, and provides higher R-value per inch.
How thick should I spray? For walls: open-cell 3–5.5″ (fills 2×4 or 2×6 cavity), closed-cell 1–3″. For attics: open-cell 5.5–10″, closed-cell 3–5″.
