Idiot cuts wallboard Q

[zoothorn]

Hi chaps. I am an idiot & I'm stood looking at my (9mm pB) 27mm insulated plasterboard.. how not to bodge up cutting it is the Q.

 

I got -only- one 8'x4' sheet with all my 3 window/ 2 door reveals all marked out.. just squeezed all on this 1 sheet, great.. but some are long 920 x 200mm sections (door reveal sides).. so possibliity of breaking is high. And I can't get another sheet: I can't fk this up.

 

Can I get some advice of safest way to do this? thanks- zoot.

[bassanclan]

920x200 is not too long. Maybe you mean 1920x200?

I would use a long level to mark your cuts the use an old wood saw to cut it.

[joe90]

Just make sure it’s well supported to stop bits snapping off ?

[ProDave]

If I have an awkward bit to cut and only 1 bit of material (or expensive material) I make a cardboard template and get that right before cutting the real stuff.

 

[zoothorn]

2 hours ago, bassanclan said:

920x200 is not too long. Maybe you mean 1920x200?

I would use a long level to mark your cuts the use an old wood saw to cut it.

 

yes sorry/ got that wrong: actually looking at my diagram.. I have the 1st cut being the length of the board, by only 235mm W. 

 

Then two 1900 x 235. Next two 1900 x 130. So after the 1st trickiest cut (as its longest) I have a number of long thin bits to cut.

 

Its how to cut mainly the 1st long section, without it falling off or snapping etc. When you say a saw.. are you suggesting laying board flat on a surface & get thru it like so? or propping it up & somehow supporting the thin width cut section/ all along it? I just can't think how if so.

[zoothorn]

1 hour ago, ProDave said:

If I have an awkward bit to cut and only 1 bit of material (or expensive material) I make a cardboard template and get that right before cutting the real stuff.

 

 

Hi ProDave. Its not so much the shape of the bits to cut (they're simple long rectangles), but how to cut & separate these thin rectangles from the majority left, without ruining them.

 

Or is it just a case of doing it best like you would any normal shaped bit.. IE score one side (presumably the insulated side in my case) lift onto a batten & press > it snaps ? but then somehow I have to haul it upright > score down reverse side to complete the cut: this you see I'd imagine a n'mare of the cut bit likely just falling/ breaking. Or worse the main bit.

 

Its just me doing it you see.

[ProDave]

Score and snap works for a straight line that goes all the way across the board. Score the plasterboard side for a clean cut where it matters.

 

For anything else use a panel saw and cut it.  Beware, plasterboard blunts a saw quickly, so I have an old already blunt saw kept especially for cutting plasterboard.

[Temp]

I now you can score and snap plasterboard but i'd be surprised if the insulation breaks cleanly?

 

How about a TCT blade in a circular saw or jigsaw?

[joe90]

Fir insulated plasterboard I always use an old saw, put the board on something like a few Tesco crates or similar to support all the bits then cut away ?.

[Gone West]

The board just needs to be supported both sides of the cut line for the full length of the board. Then I would cut with an old fine tooth wood saw.

[zoothorn]

14 hours ago, joe90 said:

Fir insulated plasterboard I always use an old saw, put the board on something like a few Tesco crates or similar to support all the bits then cut away ?.

 

14 hours ago, joe90 said:

 

Ok thanks chaps- I dont have a fine woodsaw, an old near shot one tho.. so will do a practise cut. I think pallets for support then if I can source.

 

Many thanks.

 

 

[PeterW]

Your old wood saw will be fine as long as it’s not too coarse. 

[zoothorn]

6 minutes ago, PeterW said:

Your old wood saw will be fine as long as it’s not too coarse. 

 

Ok gotcha- thanks Peter.