Climate creep is real and it can sneak up on even the most solid layout builds. I learned the hard way when my mainline developed a noticeable hump during a summer heatwave in the attic. Turns out, unsealed plywood and expanding foam don’t mix well in humid conditions.
Since then, I’ve started:
Sealing all wood surfaces with primer before any construction.
Using foam board over a rigid frame for flexibility and lightness.
Installing a small dehumidifier in the train room.
Leaving minor expansion gaps in track joints (especially long runs).
It’s all about planning for movement before it happens. What strategies or materials have worked for you to keep your track smooth year round? Let’s trade tips and keep those rails straight through every season!
0
credits