How much can concrete block insulation help to increase the R-value of your construction project? By placing EPS blocks from Universal Construction Foam inside the cavities of a concrete block, a combined R-value is achieved at a point between that of the concrete and the EPS foam. A typical situation would be placing a 5 inch thick block with an R-value of 20.5 in a concrete block with an R-value of 1.11. The new combined value will be an average of 13.5 – energy efficiency raised easily with a very simple procedure. Find out more from our foam experts on 410-498-0000.