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We recently bought a 30 yr old house and the garage has timber battens on the roof. It's pretty old, looks worn out but not as much if it's time to replace it. So need to know if some cleaning and wood treatment will extend its lifetime for a few more years.
Attaching the picture for reference. Has anyone come across such a scenario? Any diy ideas welcome. Thanks!
Welcome to the Bunnings Workshop community @Yammuna. It's terrific to have you join us, and many thanks for your question about hardwood.
30 years in a short length of time for a hardwood that is in a dry location, and from what I can see, these show no sign of decay. Their lifespan would be in the vicinity of 150+ years unless they become water-damaged. That "worn out" look is exactly the same as the day they were installed; that's just the look of hardwood. So, it's just the aesthetics you could work on if they're troubling you. You could paint them if you wanted or consider installing Gyprock sheeting over them.
Please let me know if you have any questions.
Mitchell
Hi again @Yammuna.
I thought I'd add that although there is no need to treat the timber, applying a primer like Dulux 500ml White Prepcoat 1Step Oil Based Primer Sealer And Undercoat is likely a good idea to ensure your topcoat paint adheres sufficiently to the timber.
Mitchell
Afternoon @Yammuna
I really like the look of the beams in their natural colour. And I wouldnt think they need anything to prolong their life. As @MitchellMc says they are hardwood 
Not going anywhere anytime soon.
I actually left my garage beams as they were when I redid my garage. I think they add character. If I get fed up with that type of look I have thought to do the ceiling with a thin slatted type look with 20mm timber then 20mm gap and so on. My garage walls looked pretty much like yours until I lined them with plaster
Dave
