As someone who's tackled tile and grout repair in Canada, I can vouch for the importance of using sealants that withstand fluctuating temperatures and humidity. Regular maintenance and deep cleaning help prevent mold, especially during long winters. For stubborn stains or cracked grout, hiring professionals can be a smart move to ensure long-lasting results. Proper tile and grout repair in Canada really comes down to using the right materials and knowing when to DIY or call in the experts.