DIY

Calculate Roof Snow Load (PSF)

Built by Kevin Glover · @gloverbuilds · Verified formula

Calculate snow weight on your roof by depth and snow type. Know when to clear snow to prevent collapse.

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

In this article

Understanding Roof Snow Load
When to Remove Snow

Berechnung

Frischer Schnee: 50-150 kg/m². Kompakt: 200-400. Eis: 900 kg/m³. Deutsche Daecher sind nach Schneelastzonen dimensioniert (DIN EN 1991-1-3). Zone 1 (Norddeutschland): geringste Last. Zone 3 (Alpen): hoechste.

Wann Raeumen

Tueren klemmen, Knackgeraeusche, sichtbare Durchbiegung: sofort raeumen (lassen — Absturzgefahr!). Fachmann rufen.

⚡ CalcWolf Insight

The most dangerous time for roof collapse is not during the snowstorm — it is 2-3 days after, when warm temperatures partially melt snow into dense, heavy slush. Snow that seemed manageable at 15 PSF can become 25+ PSF as it compacts and absorbs meltwater.

Frequently asked questions

Traegt mein Dach den Schnee?▾

Deutsche Daecher sind nach Schneelastzonen dimensioniert. Bei Unsicherheit: Statiker fragen.

Wann gefaehrlich?▾

Knackgeraeusche, klemmende Tueren, Durchbiegung = sofort Fachmann.

✓ Math logic verified against primary sources → See our verification process

Kevin Glover · @gloverbuilds

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 →