Soggy joist ends; £££ reasonable?

[Brown and Boris]

Looks like the floor joists which run into my very damp (soon to be damproofed) gable end are soggy. The solution appears to be to chop off the ends to good wood (possibly about 600mm), attach new treated and protected ends with a special fitting and treat the wood (cream and plastic ends)to prevent furture rotting. I have a ball park figure (they have yet to lift all the floor boards) of £70-£95 a joist.

Anybody had this done, was it successful and does this price sound reasonable?

[Brown and Boris]

I did wonder if a jobbing builder would take that chemical approach. You can buy a joist end kit for about £20

http://www.joist-repair.co.uk/Joist%20Repair%20Sho...

treat the joist end and enclose it to stop it getting damp with one of those screwfix thingies.