$68.99 Homasote R-1.2 0.5-in x 4-ft x 8-ft Sound Board Unfaced Cellulose Foam Board Insulation with 
Dow (Common: 2-in x 4-ft x 8-ft; Actual: 2-in x 4-ft x 8-ft) Square Edge R5 Faced Polystyrene 
Envirosheet Expanded Polystyrene Insulated Sheet (1/2-in x 2-ft x 8-ft) | Lowe's Canada
