Merrimack Building Supply now stocks Rockfon / Chicago Metallic acoustical ceiling tiles and grid. Rockfon has been a leading manufacturer of ceiling tiles in Europe for over 50 years. Now available at Merrimack Building Supply these tiles have impressive advantages. Made from stone wool Rockfon tiles carry excellent sound absorption, fire protection, and water resistance. Check out Rockfon website for more specialty ceiling products or contact one of our sales associates.