Replacing rotten skirting

[nwal]

So I recently removed some skirting board in my lounge to run a cable up the wall the house is 100+y/o with concrete floors more recently added I would assume anyhow when I removed it one end of the board crumbled in my hand now I have a replacement but was wondering if there's anything I can do to stop it happening again the below images are of the wall and the remains of the skirting board it is an internal adjoining wall and suggestions greatly appreciated

 

[blup]

The flooring and decoration appears to have been done to a good standard, replace all the skirting slightly taller than the existing. Otherwise what remains may rot. Treating with wood hardener and filler is likely to be more time consuming and/or expensive.

Blup

 

[mrrusty]

There appears to be some characteristic square blocks in the rot which indicates dry rot. I would give the area a good spray of dry rot treatment

 

[nwal]

The flooring and decoration appears to have been done to a good standard, replace all the skirting slightly taller than the existing. Otherwise what remains may rot. Treating with wood hardener and filler is likely to be more time consuming and/or expensive.

Blup

Thank you I have removed the entire length and am replacing with a whole new piece

 

[nwal]

There appears to be some characteristic square blocks in the rot which indicates dry rot. I would give the area a good spray of dry rot treatment

Thank you I wasn't sure weather it was damp or dry rot would you be able to recommend a treatment and or prevention process