Lifting floorboards for wiring

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Any tips please, not done none for years and used to use a bolster chisel.
But recall it used to damage the side of the boards.
Or was I too heavy handed.
 
What sort of boards are they? tounge and groove or 8x4 chipboard??

I use a small circular saw depthed to match the boards cut all 4 sides and lift the most time consuming part is bridging the chipboard before making good.
 
These are very useful for lifting floorboards, combined with a flat pry bar ('Wonder Bar').

I use a Fein Multimaster for cross-cutting floorboards (although you can't achieve a truly square cut it doesn't matter if you're replacing the board in the same place). The Fein is also handy for cutting tongues off short lengths of T&G boards.

On occasion I use a circular saw set to the depth of the board, run against a batten temporarily screwed to the floor.
 
I'm very reluctant to use power saws on floorboards so I always use a floor board saw and take it easy. Chipboard is a nightmare though!
 
We had some plumbers visit our home and used a circular saw to split the tongues before lifting some floor boards. Result: Nasty gaps between the boards when they were put back.

An electrician who came a few weeks later used a Stanley knife to cut along the tongues, then pried the boards up. It made a really scary noise, as if the boards were splitting, but the result is that when he put them back, they look as if they were never taken up.
 

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