How long does it take for structures to decay in Rust?

Decay time in Rust depends on material type at 100% health: Twig decays in 1 hour, Wood in 3 hours, Stone in 5 hours, Sheet Metal in 8 hours, and Armoured in 12 hours. Structures with lower health decay proportionally faster. For example, a wood structure at 50% health will decay in 1.5 hours instead of 3 hours.

How do I stop my base from decaying in Rust?

To prevent decay, place a Tool Cupboard within your base and fill it with the same materials your structures are made of. The cupboard consumes materials over time to maintain structures. Wood structures need wood, stone needs stone, metal needs metal fragments, and armoured needs high-quality metal. Keep the cupboard stocked to prevent decay from starting.

What is the decay rate in Rust?

Rust uses a default decaytickrate of 300 seconds (5 minutes). Decay damage is calculated every tick based on material type and current health. The decay formula is: Decay Time (hours) = Material Base Time × (Current Health % ÷ 100). Base times: Twig=1h, Wood=3h, Stone=5h, Sheet Metal=8h, Armoured=12h. Server admins can modify the decaytickrate setting.

Do cars decay in Rust?

Yes, vehicles including cars, minicopters, and boats decay in Rust when left unattended. Vehicles decay faster than structures. A minicopter at 100% health decays in approximately 3 hours outdoors. Storing vehicles in a garage with a Tool Cupboard prevents decay. Vehicle decay times vary by type and can be affected by server settings.

How long does wood last in Rust?

Wood structures at 100% health take 3 hours to fully decay in Rust. At 50% health, they decay in 1.5 hours. At 25% health, decay time is 45 minutes. Wood is commonly used for early-game bases and temporary structures. To prevent wood decay, maintain a Tool Cupboard stocked with wood (approximately 10 wood per wall per day).

What material decays slowest in Rust?

Armoured material has the slowest decay rate in Rust, taking 12 hours to fully decay at 100% health. This makes it ideal for long-term bases and high-value storage. However, armoured structures are expensive, requiring high-quality metal. The decay hierarchy from fastest to slowest: Twig (1h) < Wood (3h) < Stone (5h) < Sheet Metal (8h) < Armoured (12h).

Can I repair decayed structures in Rust?

Yes, you can repair structures before they fully decay. Use a Building Plan (blueprint) and the required materials to repair. Equip the plan, look at the damaged structure, and hold the repair button. Required materials: Twig needs wood, Wood needs wood, Stone needs stone, Sheet Metal needs metal fragments, Armoured needs high-quality metal. Repair costs are proportional to damage percentage.

Free Rust Decay Calculator Online | Structure Decay Time

The Rust Decay Calculator is an essential tool for players of the survival game Rust, helping you determine how long your structures and vehicles will last before they decay completely. Understanding decay mechanics is crucial for base planning, resource management, and ensuring your hard-earned builds don't disappear while you're offline.

In Rust, all player-made structures gradually deteriorate over time when not maintained through a Tool Cupboard. This decay system prevents server clutter and encourages active gameplay. Our calculator provides precise decay time estimates based on material type and current health percentage, allowing you to plan maintenance schedules and prioritize repairs.

Understanding Rust Decay Mechanics

Decay in Rust is a fundamental game mechanism that slowly reduces the health of unmaintained structures. The decay rate depends on two primary factors:

Material Type: Different building materials have different base decay times at 100% health
Current Health: Structures with lower health decay proportionally faster

Material Decay Times (100% Health)

Twig: 1 hour - Weakest material, used for temporary structures
Wood: 3 hours - Common early-game material, moderate durability
Stone: 5 hours - Mid-game material, good balance of cost and durability
Sheet Metal: 8 hours - Late-game material, high durability
Armoured: 12 hours - Strongest material, maximum decay resistance

How Decay Works

Rust uses a decay tick system to calculate structure deterioration. By default, the server checks for decay every 300 seconds (5 minutes). During each tick, structures without Tool Cupboard protection lose health based on their material type and current condition.

Decay Time (hours) = Base Decay Time × (Current Health % ÷ 100)

Example: A wood structure at 50% health will decay in 1.5 hours (3 hours × 0.5), not the full 3 hours.

Preventing Decay with Tool Cupboards

The Tool Cupboard (TC) is the primary method of preventing decay in Rust. When placed and stocked with appropriate materials, it prevents all structures within its radius from decaying.

How to Use Tool Cupboards:

Craft and place a Tool Cupboard inside your base
Authorize yourself by pressing 'E' on the cupboard
Fill it with the same materials your structures are made of
The cupboard will automatically consume materials to prevent decay

Material Consumption Rates

Tool Cupboards consume materials at different rates depending on what they're protecting:

Wood: ~10 wood per wall per day
Stone: ~10 stone per wall per day
Metal Fragments: ~20 metal per wall per day
High Quality Metal: ~2 HQM per wall per day (armoured)

Vehicle Decay

Vehicles in Rust also decay when left unattended. Common vehicle decay times:

Minicopter: ~3 hours at 100% health (outdoors)
Scrap Heli: ~3 hours at 100% health
Cars: ~8 hours at 100% health
Boats: ~3 hours at 100% health

Storing vehicles in a garage with Tool Cupboard protection prevents decay.

Repairing Structures

Before structures fully decay, you can repair them to restore health:

Equip a Building Plan (blueprint)
Look at the damaged structure
Hold the repair button (default: right-click)
Provide the required materials from your inventory

Repair costs are proportional to the damage. A structure at 50% health requires 50% of its original building cost to fully repair.

Server Settings Impact

Server administrators can modify decay rates through the decaytickrate setting:

Default: 300 seconds (5 minutes per tick)
Slower Decay: Higher values (e.g., 600 = 10 minutes per tick)
Faster Decay: Lower values (e.g., 150 = 2.5 minutes per tick)
No Decay: Some servers disable decay entirely

Note: This calculator assumes the default setting of 300. Check your server's settings for accurate calculations.

Strategic Considerations

Upgrade Priority: Upgrade external walls and foundations first, as they're most vulnerable to decay
Material Choice: Balance cost vs. decay time. Stone offers good value for mid-game bases
Multiple TCs: Large bases may need multiple Tool Cupboards for full coverage
Offline Protection: Ensure TC is fully stocked before logging off for extended periods
Raid Defense: Higher-tier materials not only resist decay but also provide better raid protection

Common Mistakes

Empty Tool Cupboard: TC must be stocked to prevent decay
Wrong Materials: TC needs the same material type as your structures
TC Not Authorized: You must authorize on the TC for it to work
TC Out of Range: Structures beyond TC radius will decay
Ignoring Low Health: Damaged structures decay faster - repair them promptly

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