Is $8,000 to remove existing attic insulation and blow in new insulation a fair price?

This quote is for adding blown-in fiberglass insulation on top of existing insulation, along with air sealing and other attic-related repairs and improvements. - Insulation Removal & Disposal: - Main attic: Remove house wrap on exterior walls in attic, fiberglass batt on vault, and animal feces. - Bag and haul away all removed materials at contractor expense, disposing in accordance with federal, state, and local regulations. - Blown in Insulation (Main attic floor, 979 sq ft): - Install fiberglass blown-in insulation to achieve up to R-49 (16" nominal depth) across all attic floor space where existing insulation allows. - Depth ruler gauges to be installed to verify insulation depth. - Baffles to be installed as needed to ensure proper ventilation. - Repair attic floor where any voids are present. - Limited Lifetime Warranty included. - Hatch Master (Main attic hatch, 30"x30"): - Install zippered, insulated attic hatch cover to prevent drafting between living/conditioned space and attic. - Seal around attic hatch with single component foam to stop air drafting if needed. - Limited Lifetime Warranty included. - Home Air Sealing (Main attic): - Install single component foam to seal wall top-plates, HVAC boots, around any electrical and lighting, and any other protrusion from the living space to the attic. - Limited Lifetime Warranty included. - Other Misc. Items: - Install Tyvek house wrap on exterior walls in attic to create an air barrier. - R-30 Fiberglass Batt (Vaulted ceiling in attic, 315 sq ft): - Install fiberglass batt / blanket insulation in floor joist cavities to achieve R-30. - Highest quality (Owens Corning) GUARANTEED, reputable national brand fiberglass insulation. - Limited Lifetime Warranty included. - Other Misc. Items: - Replace 2 gable vent screens.

This option involves a complete attic reinsulation. - Remove existing fiberglass insulation (currently R43, compacted from 30 years). - Perform air sealing in the attic. - Blow in new cellulose insulation to achieve R50, meeting current code.

This quote is for adding R40 blown-in insulation on top of the existing attic insulation. - Existing Insulation: Two layers of paper backed batts, 1.5" Styrofoam, and wood boarding - Existing R-value: Approximately R20 - Proposed Work: Add R40 blown-in insulation on top of all existing materials