# New Garage Door Installation > New garage door installation across Hamilton, Grimsby, Stoney Creek, Burlington and Niagara. Authorized dealer for Amarr, Wayne Dalton, Garaga, C.H.I. and Clopay, installed by our own crew, never subcontracted. - Canonical HTML: https://www.garagedoorman.ca/services/new-garage-door-installation/ - Section: Home > Services > New garage door installation - Business: Garage Doorman, 6 Chestnut Dr, Grimsby, ON L3M 0C4, Canada - Phone: (905) 536-5369 | Email: info@garagedoorman.ca - Page updated: 2026-08-31 --- Insulated steel sectional doors, carriage-style doors and modern flush panels, measured at your house and installed by our own crew across Hamilton, Stoney Creek, Grimsby, Burlington and Niagara. We are an authorized dealer for five door lines, which means warranty claims go through us instead of through you. [Call (905) 536-5369](tel:+19055365369) [Understand R-value first](https://www.garagedoorman.ca/guides/insulated-garage-door-r-value/) ![Three cedar-look insulated sectional garage doors with window rows on a dark-trimmed triple garage](https://www.garagedoorman.ca/img/garage-door-installation-cedar-look.jpg) * triple garage installationCedar-look insulated sectional doors* ![Two modern black flush-panel garage doors with frosted glass strips on a brick double garage](https://www.garagedoorman.ca/img/garage-door-installation-black-double.jpg) * brick double garageModern flush-panel doors with frosted glass* ## The four decisions that actually matter Colour and window layout are the fun part and they are also the easy part. These four are the ones that decide whether you like the door in five years. ### 1. Insulation, and reading the number honestly Doors are advertised with an R-value, and that number is not what most people think it is. DASMA is direct about it: R-value is *calculated* on a single door section, U-factor is *tested* on the complete installed door assembly including track, hardware, joints and seals, and "these two values are not comparable to each other." They are not even reciprocals of each other for a garage door. Source: DASMA Technical Data Sheet [#163, U-factor and R-value for Residential and Commercial Garage Doors](https://www.dasma.com/wp-content/uploads/2022/09/TDS163..pdf) (PDF). Checked 31 August 2026. Full explanation in [our R-value guide](https://www.garagedoorman.ca/guides/insulated-garage-door-r-value/). What insulation genuinely buys you on an attached garage in this climate: a warmer room over the garage, a much quieter door, and a stiffer door that resists denting and wind. What it does not buy you is a heated garage, if the walls and ceiling are uninsulated and the door to the house is not sealed. ### 2. Weight, because the counterbalance has to match it An insulated steel door is significantly heavier than the uninsulated one it replaces, and the springs have to be sized for the new weight. This is not optional and it is not an upsell: DASMA lists applying a spring to a door heavier than the manufacturer's specification as a real cause of premature failure, including where weight has been added to a door after installation. Source: DASMA Technical Data Sheet [#190, Factors Affecting Spring Cycle Life](https://www.dasma.com/wp-content/uploads/2021/12/TDS190.pdf) (PDF), Installation Factors. Checked 31 August 2026. ### 3. Windows, and what happens to them in a cold snap Glazing looks good and it is the single most common source of a service call people did not expect: condensation. DASMA's position is that garage door condensation "is not normally a product defect", but the characteristic result of a warm humid garage meeting a cold door surface, and that "even double or triple pane glazing units may experience condensation in humid garages." A wet car parked inside is a very effective humidifier. Source: DASMA Technical Data Sheet [#195, Garage Doors and Condensation](https://www.dasma.com/wp-content/uploads/2022/03/TDS195.pdf) (PDF). Checked 31 August 2026. It is worth having windows. It is also worth knowing this before January rather than after. ### 4. Colour, on a door that faces the sun A dark insulated door in direct sun will bow more than a light one, because the outer skin grows relative to the inner skin. DASMA calls this thermal bowing and says plainly that it is "an inherent characteristic on garage doors with insulated bonded core sections and is not considered a product defect", with darker colours and larger doors both increasing it. It is manageable with the right reinforcement, and it is a conversation worth having if you want a black door on a south-facing double. Source: DASMA Technical Data Sheet [#185, Thermal Bowing of Garage Doors with Bonded Core Sections](https://www.dasma.com/wp-content/uploads/2021/12/TDS185.pdf) (PDF). Checked 31 August 2026. ## Foam insulation and the Canadian code The foam inside an insulated door is a code matter, and the Canadian rule is not the American one. The National Building Code of Canada requires the foam plastic itself to be rated for flame spread and smoke development by testing to CAN/ULC-S102, with a flame-spread rating not exceeding 200 and a smoke-developed classification not exceeding 300. Unlike the US model codes, the NBCC contains no prescriptive requirement on the material or thickness of the covering over the foam. Source: DASMA Technical Data Sheet [#159, Garage Doors and Foam Plastics: Fire Protection — Canadian Applications](https://www.dasma.com/wp-content/uploads/2024/03/TDS159-.pdf) (PDF), citing 2020 NBCC 3.1.13.2.(2) and 9.10.17.1.(2). Checked 31 August 2026. One line from that same sheet is worth repeating because people ask: a sectional garage door is not intended for installation in a fire-rated wall. That is a different product entirely. ## Measuring, and why we do it at the house An opening is not just a width and a height. The install depends on headroom above the opening, backroom into the garage, the side room beside the opening for the track, and whether the jambs are sound enough to fasten to. A door quoted off a photo is a door that arrives and does not fit, or that fits with a compromise nobody told you about. Non-standard openings are common on older Hamilton and Dundas garages, and low headroom is common on anything with a converted or lowered ceiling. Both are solvable; both need to be known before ordering. ## What the install includes 1. Removal and disposal of the old door, track and hardware. 2. New track, rollers, hinges, brackets and cables sized to the new door. 3. New springs matched to the new door's weight and to a cycle rating you choose. 4. New perimeter weatherstripping and a new bottom seal. 5. Reconnecting or replacing the opener, with travel and force settings reset for the new door. 6. A balance test and a safety reversal test before we leave. ## Lines we carry Amarr doors Wayne Dalton doors Garaga doors C.H.I. doors Clopay doors Chamberlain openers LiftMaster openers Being an authorized dealer matters for a boring reason that shows up years later: a replacement section can be ordered against your original order rather than guessed at from a photo. That is the difference between [replacing one dented panel](https://www.garagedoorman.ca/services/garage-door-panel-replacement/) and replacing the whole door. ## Do you need a permit? For a like-for-like replacement in the existing opening, generally no. Making the opening bigger is a different matter. Each municipality in this area publishes its own rule and they are not identical, so we [quote each one directly on its own page](https://www.garagedoorman.ca/guides/garage-door-permit-hamilton/). ### Thinking about a new door? Quotes are done at the house, because the opening decides what will actually fit. [Call (905) 536-5369](tel:+19055365369) ### Have ready when you call - Single or double, and rough width. - Is there a room above the garage? - Is the garage heated or insulated? - Which direction does the door face? - Keeping the existing opener? ### Read first - [What R-value really means](https://www.garagedoorman.ca/guides/insulated-garage-door-r-value/) - [Permits by municipality](https://www.garagedoorman.ca/guides/garage-door-permit-hamilton/) - [Ontario winter failures](https://www.garagedoorman.ca/guides/garage-door-winter-problems-ontario/) ## Related - [Panel replacement](https://www.garagedoorman.ca/services/garage-door-panel-replacement/) - [Opener installation](https://www.garagedoorman.ca/services/garage-door-opener-repair/) - [Weather seals](https://www.garagedoorman.ca/services/garage-door-weather-seal/) - [Service areas](https://www.garagedoorman.ca/areas/) - [All services](https://www.garagedoorman.ca/services/) Authorized dealer · our own installers ## Measured at your house, not off a photo. [(905) 536-5369](tel:+19055365369) [Contact and hours](https://www.garagedoorman.ca/contact/) --- Garage Doorman repairs and installs residential garage doors from Grimsby, Ontario. (905) 536-5369. Full site: https://www.garagedoorman.ca/