# Garage Door Guides for Ontario Homeowners

> Plain answers to the questions homeowners actually ask about garage doors, with the technical source cited beside each fact: spring cycle life, R-value, safety sensors, permits, winter failures and water under the door.

- Canonical HTML: https://gd-concept.pages.dev/guides/
- Section: Home > Guides
- Business: Garage Doorman, 6 Chestnut Dr, Grimsby, ON L3M 0C4, Canada
- Phone: (905) 536-5369 | Email: info@garagedoorman.ca
- Page updated: 2026-08-31

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Six questions we get asked constantly, answered properly. Every figure on these pages comes from a published technical standard, a manufacturer, or a municipality, and the document is linked beside the claim so you can check it yourself. Nothing here is a guess, and nothing here is a sales page in disguise.

## The guides

### [How long do garage door springs last? Springs are rated in cycles, not years. What that converts to, and what shortens it. Read the guide](https://gd-concept.pages.dev/guides/how-long-do-garage-door-springs-last/) ### [R-value on a garage door, and why the number is misleading R-value is calculated on one section. U-factor is tested on the whole door. They do not compare. Read the guide](https://gd-concept.pages.dev/guides/insulated-garage-door-r-value/) ### [Garage door safety sensors, and the test you owe them monthly Where the photo eyes must sit, why the door reverses, and the two monthly tests. Read the guide](https://gd-concept.pages.dev/guides/garage-door-safety-sensors/) ### [Do you need a permit to replace a garage door? Hamilton, Burlington, Grimsby and Lincoln, with each municipality quoted directly. Read the guide](https://gd-concept.pages.dev/guides/garage-door-permit-hamilton/) ### [Why garage doors fail in an Ontario winter Frozen to the slab, condensation, thermal bow, and springs that give up in January. Read the guide](https://gd-concept.pages.dev/guides/garage-door-winter-problems-ontario/) ### [Water coming under the garage door A garage door is not a watertight door. What a seal can fix and what the slab has to. Read the guide](https://gd-concept.pages.dev/guides/water-under-garage-door/)

## Why a garage door company publishes this

Most of what is written online about garage doors exists to make a phone ring. The numbers get rounded until they are wrong, the safety advice gets softened until it is dangerous, and nobody says where anything came from.

These pages are the opposite arrangement. Where there is a real standard, we quote it and link the PDF. Where a municipality publishes its own rule, we quote that municipality rather than generalising across Ontario, because the rules genuinely differ between Hamilton, Burlington and Grimsby. Where something is unknowable without seeing the door, we say that instead of inventing a price band.

## Where the facts come from

- **DASMA**: , the Door & Access Systems Manufacturers Association, publishes free technical data sheets covering spring cycle life, thermal values, photoelectric sensor placement, condensation, water infiltration and inspection procedure. These are the documents door manufacturers themselves work to.
- **ANSI/CAN/UL 325**: is the standard residential garage door operators are listed to in Canada and the United States. It is what makes an opener reverse.
- **The National Building Code of Canada**: sets the flame-spread and smoke-development limits for the foam insulation inside an insulated door.
- **Each municipality**: publishes its own list of work that does and does not require a building permit. We quote the city, not a summary of the city.
- **Manufacturers**: publish cycle ratings, sizes and specifications for the doors and openers we actually install.

## What we will not put on these pages

No invented prices. No fake urgency. No "average cost in Ontario" figure pulled from an American article. If you want a number for your door, the honest way to get one is a look at the door, and that is a phone call.

## Related

- [All services](https://gd-concept.pages.dev/services/)
- [Annual tune-up](https://gd-concept.pages.dev/services/garage-door-tune-up/)
- [Service areas](https://gd-concept.pages.dev/areas/)
- [Contact and hours](https://gd-concept.pages.dev/contact/)

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Garage Doorman repairs and installs residential garage doors from Grimsby, Ontario. (905) 536-5369. Full site: https://gd-concept.pages.dev/