Garage Door Seals are very easier to install yourself if you choose to do so.
Above is a video showing detailed instructions on installing the garage door seals yourself.
Below is a general list of steps you can follow to install them yourself.
1. Remove the seals from the cardboard tube
2. In the tube, you will find the wood fixing screws and four lengths of seals
3. Measure the length of the door
4. Cut the end with a grinder or a hacksaw
5. Drill holes in the weather seal 20-50mm from each end and then space another three hoes evenly along the length of the seal. Five holes are enough to hold each length in place
6. Drill Holes into Garage Door Garage Door Seal6. Install the seal onto the wall with the brush facing in towards the door
7. On the left and right sections overlap the brushes