Short Answer
Insulated siding incorporates insulation into the siding assembly. Potential benefits include improved thermal performance and a more substantial wall profile, depending on the system.
Detailed Explanation
Insulated vinyl siding has a layer of rigid foam insulation (typically expanded polystyrene) adhered to or formed into the back of each siding panel. This provides several benefits: improved thermal resistance (R-value) that reduces heat transfer through the wall, a more rigid panel that resists impact and provides a straighter wall appearance, and reduced noise transmission. The insulation also helps bridge minor irregularities in the wall surface beneath. Insulated siding is more expensive than standard vinyl siding, but the thermal and structural benefits may justify the cost, particularly on homes with older, less insulated wall assemblies.
Why It Matters
Insulated siding can improve energy performance and wall appearance, but the cost-benefit should be evaluated based on the home's existing insulation and the homeowner's budget.