We have a bungalow style home with a finished attic. I have access to pretty much all of the back of the walls. None of them have any insulation and it was recommended that it be added by our home inspector. I used the r-value calculated and it recommended an r-value of 49. Is this too much for a finished attic. What would you recommend? Thanks.

I recently got a couple estimates from waterproofing companies.They were basically the same.The last estimate was the least expensive.They would install 4" PVC.Backfill w/crushed stone,recement floor leaving l/2" groove.They will drain the cinder block at base and also install a drain grate at back entrance.The other companies were more expensive but all used some type of plastic drainage board againist wall and across footer. I asked why his company didn't use the board and he said he didn't like to use the board because they sometimes gets clogged.Seems to make sense to me but if I was so smart I wouldn't be asking your opinion.Should I pay the extra money and go with a company that uses the drain board.Of couse each company states that their system is the best?I would appreciate your help.Thanks.