A lifetime warranty is only as good as the company that offers it. GEM Window & Doors has a well-earned reputation as Toronto's oldest and most trusted window and door company. we've had the same phone number since 1961 - a real rarity in an industry where 'windows and doors' has become synonymous with 'fly by night.' At GEM, we listen more than we talk. We start where you are - your needs, your budget and your priorities - to provide you with customized solutions, not a one-size-fits all approach. more... See more text