Lafarge North America late Tuesday reported third-quarter earnings of $165.6m, or $2.16 a share, compared with $225.3m, or $3.07 a share, last year. The construction materials supplier reported sales from continuing operations of $1.23bn, up from $1.16bn last year. Lafarge also said the board has approved of spending up to $60m for stock repurchases when its current buyback plan expires on Dec. 31.