I have a garden shed with steel (powder coated) walls. I'd like to attach a piece of timber to the inside of the wall. I'll use the timber to attach hooks for hanging tools.
I don't want the holes I put in the wall to create a leak, and I don't know the best technique to use to prevent it leaking. The shed doesn't have eaves.
2 or 3 bolts through the timber and the shed wall would probably be sufficient when it comes to strength. Would some silicone sealant around the bolts stay watertight for a few years? Is there a better way of preventing water leaking through the bolt holes, or a better way of securing the timber?
In case it matters, temperatures in my location range from -5 to 35 C