Is $3,300 to add R-30 unfaced fiberglass batts on top of existing R-19 a fair price?
Project Details
I have a 1960s Long Island ranch with a low-slope roof and front- and rear-facing gables over the master and guest bedrooms. The house is almost a T-shape — the top of the “T” is where the gabled bedroom areas are, and those sections of the attic are tight spaces and hard to physically access. My current attic has existing R-19 fiberglass batts, which are uneven/compressed in places, and there is no real air sealing. I'm not planning for this to be a forever home, likely staying for about 7 more years.
Quote Details
This option involves leaving the existing R-19 fiberglass batts in the attic and adding R-30 unfaced fiberglass batts on top. - Existing Insulation: R-19 fiberglass batts (uneven/compressed in places, no real air sealing) - New Insulation: R-30 unfaced fiberglass batts - Coverage: Installer admits some gabled crawl-space areas may not get full coverage.
You say...
Vote Distribution
These ratings are not endorsed by Quote Critic. They are submitted by other Quote Critic users like you.
More Details
Category
Insulation
Price
$3,300
Quote Date
February 1, 2026
Location
New York
Year Built
1960
Insulation Type
Batt
R Value
R-30
Comments
No comments yet
Sign in to share your thoughts and ask questions.
Similar Quotes
Add R-38 batts to existing insulation and install baffles
This quote is for adding R-38 batts to the existing R-11 attic floor insulation. The new batts will be installed perpendicularly to the existing insulation. Baffles will also be added. - Attic Floor Size: Approximately 1,000 sqft - Existing Insulation: R-11 - New Insulation: R-38 batts, installed perpendicularly - Additional Work: Add baffles
Add blown in fiberglass insulation to achieve an R-49 value
This option includes adding blown-in fiberglass insulation to the attic. - Insulation Type: Blown In Fiberglass - Work Scope: Replace faced batt insulation around baffle areas with unfaced batt to prevent moisture issues. - Goal: Add to existing insulation to achieve an R-49 value. - Specific Focus: Address the area above the entry doorway that is missing insulation.
Add blown-in fiberglass insulation on top of existing, air sealing, and attic repairs
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.