How much does it cost to replace roof decking

July 2022

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For a basic project in zip code 47474 with 500 square feet, the cost to Install Roofing Underlayment starts at $0.90 - $1.08 per square foot*. Actual costs will depend on job size, conditions, and options.

To estimate costs for your project:

1. Set Project Zip Code Enter the Zip Code for the location where labor is hired and materials purchased.

2. Specify Project Size and Options Enter the number of "square feet" required for the project.

3. Re-calculate Click the "Update" button.

NOTE: *Input the total of the finished surface area AND the area of any openings enclosed by the finished area.

Unit Costs: How Pros Price

Unlike other websites that publish pricing from unrelated jobs in the past, Homewyse creates up-to-date estimates from current Unit Costs. The Unit Cost method delivers high accuracy by using location, details and options for the unique requirements of each job. Contracting, trade, design and maintenance businesses rely on the Unit Cost method for transparency, accuracy and fair profits.

Cost to Install Roofing Underlayment - Notes and General Information

These estimates are for BASIC work performed in serviceable conditions by qualified trade professionals using MID GRADE materials. Work not mentioned on this page and/or work using master craftsman, premium materials and project supervision will result in HIGHER COSTS! Explore the full range of roofing underlayment new installation labor options and material prices here.

These estimates are NOT substitutes for written quotes from trade professionals. Homewyse strongly recommends that you contact reputable professionals for accurate assessments of work required and costs for your project - before making any decisions or commitments.

The cost estimate includes:

• Costs for local material / equipment delivery to and service provider transportation to and from the job site.
• Costs to prepare the worksite for Roof Underlayment Installation, including costs to protect existing structure(s), finishes, materials and components.
• Labor setup time, mobilization time and minimum hourly charges that are commonly included for small Roof Underlayment Installation jobs.

The cost estimate does NOT include:

• Costs for removing, relocating, repairing, or modifying existing framing, surfacing, HVAC, electrical, and plumbing systems - or bringing those systems into compliance with current building codes.
• Costs for testing and remediation of hazardous materials (asbestos, lead, etc.).
• General contractor overhead and markup for organizing and supervising the Roof Underlayment Installation. Add 13% to 22% to the total cost above if a general contractor will supervise this project.
• Sales tax on materials and supplies.
• Permit or inspection fees (or portion thereof) required by your local building department for your overall project.

References - Roof Underlayment Installation

• Product and Supplies Data: BuildDirect Roofing Materials BuildDirect, Jul 2022, Website
• Product and Supplies Data: Modern Builders Supply Roofing Materials Moder Builders Supply, Jul 2022, Website
• Product and Supplies Data: Home Depot Roofing Materials Home Depot, Jul 2022, Website
• Product and Supplies Data: Plumbing Components and Supplies McCoys, Jul 2022, Website
• Carpentry and Building Construction, Student Text Glencoe/McGraw-Hill; 6th edition, Jan 2003, Mark Feirer, John Feirer, ISBN 007822702X
• The HUD PATH Rehab Guide Volume 3: Roofs U.S. Department of Housing and Urban Development Office of Policy Development and Research, Mar 2011, Editorial Staff
• The Building Estimator's Reference Book , Mar 2012,
• Moisture Control Handbook, Oak Ridge National Laboratory, Dec 2009, Editorial Staff
• Labor Wages and Costs: CPWAR Construction Cost Book The Center for Construction Research and Training, Jul 2022, Staff
• Project Spending Data: Harvard University JCHS Homeowner Expenditures Harvard University, Jul 2022, Website

Roof Underlayment Installation Budget Management

This infographic highlights decisions and site issues that can cause large cost variances in the typical Roof Underlayment Installation budget.

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