I will be replacing rotted 1 x 6 sub flooring and underlayment under the stool. Have crawl space. Will be using 1/4 backer board over all surface and putting in new vinyl. Has been a very long time since I last removed a cast iron flange. Want to raise it to level of backer board. Seems it was leaded around the top. Am I correct in my thinking? Suggestion appreciated.

I will be replacing rotted 1 x 6 sub flooring and underlayment under the stool. Have crawl space. Will be using 1/4 backer board over all surface and putting in new vinyl. Has been a very long time since I last removed a cast iron flange. Want to raise it to level of backer board. Seems it was leaded around the top. Am I correct in my thinking? Suggestion appreciated.
Hey Cruiser, welcome back.
If you've fogot how to take out a lead and oakum joint, here's how. To remove a poured lead and oakum joint take a 3/8" drill bit and drill a few holes down past the lead and into the oakum.. Push a screwdriver under the lead ring and lever it up. Once it's free you can began to peel the lead ring out. Now pick out the oakum and you can pull the joint apart. Good luck, Tom

Thanks Tom... You have it. Amazing how things will return when someone turns on the switch. Thanks again. PTC