Wet/damp, advice please...

[Fraser]

Hi

I was in my attic tonight fitting a new light and I noticed some white mouldy looking stuff on one of the beams/joists. I took a couple of photos so if anyone recognises what this is and how to treat it I'd appreciate the advice.

The timber is not wet or damp to touch but when I knock it it sounds slightly denser and doesn't resonate(?) like the unaffected portion. The noise is only slightly different.

[ultimatehandyman]

It looks like water has been leaking onto it at some point in the past.

As precaution I would treat it with cuprinol 5 star wood treatment.

You will need a mask and gloves and goggles, just brush it on and let it soak in and it should stop anything happening to the beam then.

[Wood Magnet]

I agree with that chez.