To measure your garage door T channel, you are essentially measuring the width of the "T" part of the existing bottom seal. This measurement is crucial for purchasing the correct replacement seal that slides into the channel or retainer at the bottom of your garage door.
Why Measure the T Channel?
The retainer (or channel) at the bottom of your garage door is designed to hold a specific size and style of weather seal. The most common style is the T-style, named because the end of the seal that slides into the retainer resembles the letter "T". To ensure a proper fit and effective seal, you need to measure the width of this "T".
Measuring the T-Style Seal Width
According to the reference, measuring the width of the "T" end of the seal is the key step.
Here's how to do it:
- Identify the "T" Section: Locate the part of the garage door bottom seal that is inserted into the metal or plastic channel (retainer) at the bottom edge of the door. This section looks like a horizontal bar on top of a vertical stem, forming a "T".
- Choose Your Tool: You can use either a measuring tape or, preferably, a digital caliper for more accuracy.
- A measuring tape is generally available but less precise for small measurements.
- A digital caliper offers greater accuracy, which is beneficial for distinguishing between common sizes like 1/4" and 5/16".
- Measure the Width: Carefully measure the width across the widest part of the "T". This is the horizontal dimension of the top bar of the "T".
Common T-Style Seal Sizes
The reference states that the most common sizes for T-style seals are:
- 1/4" T
- 5/16" T
Your measurement should correspond closely to one of these standard sizes or another size offered by seal manufacturers.
Measuring Tools Compared
Here's a simple comparison of the recommended tools:
| Tool | Accuracy | Ease of Use (for this task) |
|---|---|---|
| Measuring Tape | Moderate | Easy |
| Digital Caliper | High | Moderate |
Using a digital caliper is recommended for the most precise measurement, ensuring you select the correct size seal for your garage door's T channel retainer.
