India Frost & Ground-Freezing Map

Winter minimum temperatures and frost-line depth for any Indian city. Five tiers from None (most of India, > 5°C) to Extreme (Ladakh, < −15°C, permafrost pockets). Drives foundation depth, water-line burial depth, and freeze-thaw concrete specifications.
124
none
61
rare
7
occasional
3
common
2
extreme
None · No frost · > 5°C
Rare · Sub-zero few days/year · 0–5°C
Occasional · Sub-zero 1-2 weeks/year · −5 to 0°C
Common · Sub-zero most winter nights · −15 to −5°C
Extreme · Sub-zero majority of year · < −15°C
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Click any spot on the map to drop a pin and get the estimated zone. Map data © OpenStreetMap contributors.

About frost design

Frost penetration causes ground heave, foundation movement, and pipe rupture. IS 875 (Part 4) and IS 7861 (Part 1) cold-weather concreting cover the basics. Foundations must extend below the frost line; water lines need insulation or sufficient burial depth.

Design depths by zone

  • None: foundation 1.0-1.5 m. Water lines any depth.
  • Rare: foundation 1.2-1.5 m. Water lines 0.6 m deep for cold-wave protection.
  • Occasional: foundation 1.5 m below frost line. Water lines insulated or > 1 m.
  • Common: foundation 2 m+ below frost line. Buried services > 1.5 m + insulation.
  • Extreme: site-specific permafrost study. Pile foundation. Heated/insulated water tanks.

Cold-weather concreting (IS 7861 Part 1)

For ambient < 5°C, modify mix: water-cement ratio ≤ 0.45, OPC 53 or PPC, accelerator (calcium chloride 1-2% or non-chloride alternative). Maintain concrete temperature 5-25°C for first 72 hours via heated formwork, insulating blankets, or steam curing.

Cross-references

Source IS / IRC / NBC standards

IS 7861 (Part 1)Cold Weather ConcretingIS 875 (Part 4)Snow + frost loads — AnnexIS 1904Foundation depth — frost line consideration

Related maps

Snow LoadCombined snow + frost in HimalayasGroundwaterWater lines need protection in frost zonesClimate ZonesCold climate = frost protection mandatory

Calculators & tools

Footing DesignFoundation depth below frost line

Articles & guides

CE HandbookFoundation reference for cold regions

Frequently asked questions

What foundation depth is required in Leh?

Leh sits in the Extreme frost zone. Foundation depth 2-3 m below grade or anchored to bedrock. Frost-resistant concrete (W/C ≤ 0.45, air-entrained 5-7%, durability cement). Site-specific permafrost study recommended for any structure beyond residential.

Do plains cities need frost protection?

Most of India: no. Foundation 1.0-1.5 m and standard concrete adequate. Exception: Delhi NCR, Punjab, Haryana experience occasional sub-zero cold waves. For these, water lines should be 0.6 m deep, and concreting during Dec-Jan should follow IS 7861 cold-weather provisions if temperatures drop below 5°C.

What happens if frost line is exceeded?

Water in soil pores expands ~9% on freezing → ground heaves 5-15 cm. If foundation is shallower than frost depth, the entire structure rises and falls with seasons → cracks, tilting, settlement. Pipes burst. Concrete near surface deteriorates from freeze-thaw cycles.

Frost depth is indicative based on regional climate. Microclimate (north-facing slopes, valley floors with cold-air drainage) can deepen frost beyond regional norm. Always conduct site-specific winter ground-temperature monitoring for projects > 2,500 m elevation.

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