The answer to 'underlayment installation cost in Illinois' is that the cost of underlayment installation can vary widely depending on several factors. Generally, homeowners in Illinois can expect to pay between $1 to $5 per square foot for underlayment installation, with the final cost depending on the size of the roof, the type of underlayment used, and the complexity of the installation process.
The type of underlayment material is a significant factor in the overall cost. Synthetic underlayments tend to be more expensive than felt paper, but they offer better protection and durability. The accessibility of the roof and the need for any additional repairs or preparation work can also impact the final cost. It's essential to obtain multiple local quotes from roofing contractors to get an accurate estimate for your specific project.