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26 Aug 2026
The British Invention That Cuts PIR Board Perfectly Straight
SlideGuide
https://go.skill-builder.uk/slideguide
KEY TAKEAWAYS
• Mounting the guide on the underside of the board is what stops the blade meandering, because the cut is referenced from the face the blade exits rather than the face you can see.
• A tapered cut is caused by blade flex, not by a shaky hand, so a straight edge laid on top of the board will never fully solve it.
• A fine tooth metal cutting blade throws far less dust than a coarse soft material blade when cutting PIR and sandwiched metal roofing panels.
• The standard opening is 1118mm between the clamp pads, and releasing the thumb screws lets the telescopic rails extend to take a full length board.
• The Mini version cuts 45 degree bevels, which is where roofers waste the most board, and the clamp pads rotate so they can be set at an angle for bevel work.
WATCH NEXT
[Insulated roof panels video link]
[Loft insulation video link]
00:00 The problem with cutting PIR board
00:19 How the underside track system works
00:30 Choosing the right jigsaw blade
00:47 A longer blade with no dust at all
01:00 Dave, the millimetre perfect tradesman
01:20 Setting the opening and the clamp pads
01:47 Trimming off the damaged edge
02:02 The 40mm track saw rail
02:28 Squaring the board up in the guide
03:07 Marking 355 at both ends
03:40 The finished edge
03:57 Fitting the board between the studs
04:02 SlideGuide Mini, the single track version
04:55 Cutting a 45 degree bevel
05:39 The result and the limits of the blade
06:05 Where to buy it and the MKM rollout
Have you found a way of cutting PIR board that actually holds a line? Tell us in the comments.
#PIRBoard #Insulation #Celotex #SkillBuilder