Best way to cut across floorboards in limited space?

[Notch7]

I’d be very careful not to cut pipes and cables …..

This is so true, pipes or cables can easily be in shallow notches so literally just below the floor boards.

 

[robinbanks]

I suspect you used your multi tool incorrectly. If you plunge the tool to full depth then cut forwards etc it will wander all over the place

Instead place a straight edge on the floor, use the cutting head that looks like pacman, turn on the saw and run it smoothly, and consistently back and forth along the straight edge, gradually cutting through the floorboard in increasing depth. The end result of the cut should be a much straighter line than you would achieve otherwise (freehand etc)

If the pacman head doesn't cut deep enough you can switch to a straight / rectangular plunge cutter after Pac-Man reaches max depth, because the sides of the cut will then define the straight edge for the straight blade to follow. Set the blade at 45 degrees on the machine and then when running the cut have it at maybe 10 or 20 degrees off vertical and cut in the same way (gradually increasing depth) rather than plunging and pushing forward.

 

[Tigercubrider]

Loose rockwool will be a challenge for soundproofing.
Acoustic slabs for floors are close to huge wheatabix.

 

[Derek M]

I suspect you used your multi tool incorrectly. If you plunge the tool to full depth then cut forwards etc it will wander all over the place

Instead place a straight edge on the floor, use the cutting head that looks like pacman, turn on the saw and run it smoothly, and consistently back and forth along the straight edge, gradually cutting through the floorboard in increasing depth. The end result of the cut should be a much straighter line than you would achieve otherwise (freehand etc)

If the pacman head doesn't cut deep enough you can switch to a straight / rectangular plunge cutter after Pac-Man reaches max depth, because the sides of the cut will then define the straight edge for the straight blade to follow. Set the blade at 45 degrees on the machine and then when running the cut have it at maybe 10 or 20 degrees off vertical and cut in the same way (gradually increasing depth) rather than plunging and pushing forward.

That makes sense, thanks. I'll try that before buying any more tools.

 

[big-all]

its worth angling the blade to say 30 degrees this will allow more blade contact with the batten
also a bit off say 4mm sheet material for the machine nose to rub against will lift the blade a bit as a form off depth stop
by varying the angle off machine and thickness off rubbing timber you can get a very accurate[plus-minus 0.5mm ] quite easilly

 

[Tigercubrider]

Plunge saws are like a circular saw but fitted with a stop.
You lay them on a track, start the saw and cut along the line.
You’d have to manually cut at the wall.

PLUNGE SAW WITH 2x GUARD RAIL – Delta Tool Hire & Sales

deltatools.co.uk

Home Page - Default Store View

brandonhirestation.com

You might find it useful to hire for longer and use it to fit the new surface.

 

[Tigercubrider]

WORKZONE PLUNGE TRACK SAW, same as Scheppach PL55 | eBay

Workzone Portable Circular Saw. Portable saw ideal for flush cuts.

www.ebay.co.uk