Roof Joist Size Calculator UK Estimate a suitable timber roof joist size using UK-style loading assumptions, bending checks, and deflection checks. For final design and Building Control approval, always confirm with a qualified structural engineer. Clear span (m) Joist spacing…
Roof Insulation Calculator UK Estimate installation cost, annual savings, payback period, and carbon reduction for loft and roof insulation upgrades. Roof area (m²) Property type FlatMid terraceSemi detachedDetachedBungalow Current insulation thickness (mm) Target insulation thickness (mm) Insulation material Mineral wool…
Roof Gutter Size Calculator UK Estimate required rainwater flow and check whether your selected gutter and downpipe setup can handle UK rainfall conditions. Effective Roof Area (m²) UK Rainfall Region (preset) Low rainfall areas (50 mm/hr)Typical UK suburban (65 mm/hr)Higher…
Roof Gutter Calculator UK Estimate required gutter flow capacity, downpipe adequacy, and a practical UK sizing recommendation. Roof length (m) Roof width (m) Roof pitch category Flat or very low pitch (factor 1.00)Low pitch 10 to 20 degrees (factor 1.05)Medium…
Roof Framing Calculator UK Estimate rafter length, rise, roof area, timber quantity, and indicative timber cost for UK roof framing projects. Roof Type Gable (two slopes)Mono-pitch (single slope) Building Span (m) Building Length (m) Roof Pitch (degrees) Rafter Overhang (mm)…
Roof Drainage Calculator UK Estimate design rainfall flow, per-pipe loading, and suitable downpipe sizing for domestic and light commercial roofs in the UK. Roof Plan Area (m²) Roof Surface Type (runoff coefficient) Pitched tiled/slate roof (0.90)Flat membrane or metal roof…
Roof Drainage Calculator UK Estimate design roof runoff, downpipe loading, and capacity checks for UK projects. Roof catchment area (m²) Design rainfall intensity (mm/hour) Roof surface type Pitched tile or slate roof (C = 0.95)Flat membrane or metal roof (C…
Roof Drainage Calculation UK Estimate design flow, outlet demand, and downpipe requirements using UK rainfall assumptions and practical sizing factors. Roof Plan Area (m²) Roof Form Factor Flat roof or near flat (x1.00)Pitched roof (x1.10)Complex roof geometry (x1.20) Runoff Coefficient…
Roof Dead Load Calculator UK Estimate characteristic and design roof dead load in kN/m² for UK projects. Enter your roof build-up details, then review the total permanent action, overall roof force, and component breakdown chart. Roof Plan Area (m²) Roof…
Roof Dead Load Calculation Example UK Estimate characteristic dead load in kN/m² and total roof self-weight for concept design and early-stage checks. Roof plan area (m²) Roof form Pitched roofFlat roof Primary roof covering Concrete interlocking tiles (0.55 kN/m²)Clay plain…