Old & new floorboards

[richardrich79]

We're having to replace a section of floor and joists due to rot caused by blocked air brick + leaking window cill.
The old floorboards are pine 4" t&g and just under 1" thick 20mm exactly new 100cm boards are 19mm thick.
Should I just not worry and rely on a sander to even things out?
Or is there another method, the amount of floor to be replaced is roughly 1/3 of the room but it's all coming up to allow insulation to go under.

 

[oldessexman]

If it's only 1mm then a drum or belt sander will be easier than trying to pack the difference. When you sand make your first rough paper pass 5 degrees off of the straight which should level the difference between boards.

 

[big-all]

local timber yard or builders merchant should have them 18/19mm is diy shed wood [wicks homebase b&q ect]

 

[richardrich79]

thanks both a quick trip to Jewsons should sort it as I haven't got all the replacements yet