Open the door then measure the bottom of the door using a tape measure.
How to seal a garage door from the inside.
Purchase a garage top seal which is specifically made for sealing the top of the garage.
It keeps the garage door pressed up against the outside rubber seal so cold air is not blowing through the gap.
Garage door bottom seal for wood doors.
The easiest way to tell if the garage door bottom needs sealing is to turn off the lights in the garage during the day and check if you can see any light entering from the bottom of the door.
You can purchase an insulation kit which consists of a solid foil.
Make sure that you face the inside of the door as you take this measurement.
How to seal a garage door from the inside sealing the garage door bottom.
Insulate the garage door.
Before you do that you want to check if they even need sealing.
Another way you can seal a garage door from the inside is by seal the top of the door.
You have several choices to consider if you need to seal the bottom of.
Measure the bottom of the door.
Go into the garage close all of the doors and shut off the lights.
To install a garage door bottom seal take the measurements of your garage door and then cut the seal into size and attach it to the bottom of your door.
If your door and the walls are not insulated it can let in cold air into the garage and trap warm air when it s hot similarly sealing by adding blocks to lock out unwanted sounds is a good idea.
The fastest way to see if your garage door requires a seal is to wait for a sunny day.
This takes 5 mins to do and costs nothing.
The best way to do that is to go to your garage during the day turn off the lights and if you see the light coming from.
If you see daylight coming through the structure your seals require replacement.
The flexible material compresses when the door closes sealing the gap along the floor to keep out water dirt cold breezes and critters.
Seal the garage door bottom.
Sealing the bottom part is not enough.
The garage door bottom seal or door sweep is a long strip of rubber or vinyl that attaches to the bottom edge of the garage door.
Because the seal traps some amount of air inside when the door is closed hence creating a tight seal that blocks out rodents air and sound from leaking inside your garage.
Unlike the measurements you took for the top and side seals you will need to measure for the bottom seal by measuring the bottom of the door itself.
Below are some of my recommended methods on how to seal a garage door from the inside.