Attic cleanouts involve unique challenges from insulation removal to decades of stored items. Learn how to calculate the right dumpster size based on attic square footage, insulation type, and stored belongings.
Test before removal: Vermiculite insulation installed before 1990 may contain asbestos. Have professional testing done before disturbing. Some old electrical wiring may also contain hazardous materials.
| Insulation Type | Volume per 1000 sq ft | Special Considerations |
|---|---|---|
| Blown-in cellulose | 4-6 cubic yards | High volume, compacts well |
| Fiberglass batts | 2-4 cubic yards | Compressible, wear protection |
| Rock wool | 3-5 cubic yards | Heavy, requires dust masks |
| Spray foam | 1-3 cubic yards | Must be cut/scraped, dense |
| Vermiculite | Professional only | May contain asbestos |
Insulation compacts significantly when loaded into dumpsters. Factor in 30-50% compression when calculating volume needs. Blown-in insulation compresses most, while spray foam compresses least.
Essential protective gear for attic cleanouts:
Load furniture and dense materials at the bottom to create a stable base.
Use smaller items and insulation to fill spaces between larger objects.
Keep materials level with dumpster walls to maximize allowable volume.
Project: Complete attic cleanout with partial insulation removal
Project: Full insulation replacement and storage clearance
Attic cleanouts require careful planning to handle both stored belongings and insulation materials effectively. The key is honest assessment of your attic contents, understanding insulation volume requirements, and choosing a dumpster size that accommodates compression factors.
Most homeowners find that a 15-yard dumpster handles typical attic cleanouts perfectly, while larger homes or complete insulation replacements may require a 20-yard container. Remember to factor in safety considerations and proper disposal requirements for optimal results.
Pro tip: It's better to get a slightly larger dumpster than to pay overage fees or rent a second container. Most companies offer flexible sizing and will help you choose the right option.
Use our free calculator for a personalized dumpster size recommendation
Calculate Perfect Size →Last updated: January 15, 2025 | Written by the Dumpster Calculator Team