Include every proposed addition
Describe the material, where it would attach and the reason for adding it. Even an accessory sold for a garage may not be intended for the door itself. Do not hang bicycles, tools or other stored objects from the track or moving hardware.
Consider the complete system
DASMA warns that added weight can affect the balance, movement and connected hardware of a door. The opener should not be used to compensate for an unreviewed modification. Ask a trained technician to assess a manufacturer-supported proposal before materials are attached.
Compare alternatives that do not modify the door
A factory-insulated replacement and an aftermarket addition are different purchasing decisions. Likewise, a storage rack independently supported by the building is a separate project from attaching loads to door track. Clarify those boundaries before buying the accessory or arranging installation.
Your questions
Can a stronger opener make extra door weight acceptable?
No. The door and counterbalance system still need to be suitable for the assembly.
Does a peel-and-stick product automatically preserve the warranty?
No. Check the actual door manufacturer’s alteration and warranty terms.