Sales by Product Group (Tables)
 12 Months Ended
Dec. 31, 2016
Segment Reporting [Abstract]  
Summary of Sales by Product Group

Sales by product group are as follows:

 

     Year Ended  
     December 31,      January 2,      January 3,  
     2016      2016      2015  
(in millions)                     

Product category:

         

Impact-resistant window and door products

    $ 381.6      $ 319.2      $ 240.3  

Non-impact window and door products

      77.0        70.6        66.1  
  

 

 

     

 

 

     

 

 

  

Total net sales

    $ 458.6      $ 389.8      $ 306.4