Sorry to keep starting threads but you guys always do a great job of answering questions. I am in the process of building a Alcove type hearth and just wanted to confirm my dimensions. I am going with 60" wide by 48" deep (5' x 4') material will be 1/2 ply and 1/2 hardy board covered with ceramic tile. Materials are good as someone already mention the Summit needs only ember protection. I got my reference from this link, (broken link removed to http://www.northweststoves.ca/pdf/pac-wood/b-pacific-summit.pdf)