The answer to 'how much does underlayment cost in Illinois' is that the cost of roofing underlayment can vary significantly depending on several factors. Underlayment is an essential component of a roof system, providing a protective barrier between the roof deck and the outer roofing material.
Factors that influence the cost of underlayment in Illinois include the type of material (asphalt-based, synthetic, or felt), the quality and thickness, the size of the roof, and the location and accessibility of the project. Generally, homeowners can expect to pay between $0.50 to $2 per square foot for underlayment materials, with higher-end synthetic options costing more. It's important to get local quotes from roofing contractors to accurately estimate the cost for your specific project.