Fanfold Insulation

Fanfold insulation board is a lightweight, rigid underlayment installed beneath new siding to provide a smoother surface, added insulation, and improved energy efficiency. It helps correct minor wall imperfections and enhances the performance and appearance of siding systems.

Features & Benefits 

Performance

• Adds an extra layer of insulation to reduce energy loss
• Levels uneven surfaces for a clean, finished siding appearance
• Enhances moisture resistance and overall wall system performance

Design & Installation

• Compact fanfold design makes handling and storage simple
• Easy to cut and install with standard tools
• Compatible with vinyl, aluminum, and fiber cement siding

Durability

• Resists warping, moisture, and jobsite wear
• Provides long-term thermal and structural support behind siding
• Maintains performance in a wide range of weather conditions