Nibbler for roofing sheets
Updated: October 2026
You have plastisol box profile on trestles, a drip flashing that needs a notch, and an angle grinder that looks like the fastest tool in the van. A nibbler for roofing sheets is the cold cut for those details, if the head clears the rib. A disc scorches the coating and the zinc under it, and a flat-sheet punch can stop on a deep corrugation. Prices for the bare tools are on the [electric nibbler comparison](/hub/cutting-tools/electric-nibbler). The editorial team used UK merchant guides and amazon.co.uk reviews checked on 19 October 2026. We did not cut a roof or run a lab test.
You have plastisol box profile on trestles, a drip flashing that needs a notch, and an angle grinder that looks like the fastest tool in the van.
You have plastisol box profile on trestles, a drip flashing that needs a notch, and an angle grinder that looks like the fastest tool in the van. A nibbler for roofing sheets is the cold cut for those details, if the head clears the rib. A disc scorches the coating and the zinc under it, and a flat-sheet punch can stop on a deep corrugation. Prices for the bare tools are on the electric nibbler comparison. The editorial team used UK merchant guides and amazon.co.uk reviews checked on 19 October 2026. We did not cut a roof or run a lab test.
Our top picks
| Badge | Product | Steel capacity | Rotating head | Chip bag | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  TengXcel TengXcel Makita 18V nibbler | 3 mm maximum (bullet) | n/a | Debris bag | 6.2 | about £107.99 | View offer |
| Best value |  Gautesy Gautesy Makita 18V nibbler | 1.6 mm iron (supplied info) | 360° | Debris bag (review) | 6.4 | about £79.99 | View offer |
 DEYITONG DEYITONG Makita 18V nibbler | 2.0 mm size field | 360° | n/a | 7.1 | about £106.99 | View offer |
On this page
Why the grinder is the wrong cut
Southern Sheeting, in a guide edited on 28 June 2023, calls an angle grinder a strict no on metal roofing and cladding. Heat eats the zinc and scorches coatings such as HPS and leathergrain. Colour Clad Profiles is shorter: cold cut only, with a nibbler or tin snips, or the coating fails and the steel rusts early. A punch-and-die nibbler throws chips without that disc heat. Heamar describes little heat against a grinder, which is why merchants use a nibbler for radii, corners and flashings.
Painting a ground edge later does not undo the damage. The harm is in the heat-affected zinc and the scorched plastisol beside the line. The chips are still sharp crescents, so Heamar wants a brush, eye protection and gloves. A cold method is not, by itself, a head that will cross a rib.
Flat sheet, corrugation, or a long rip
Hilti's SPN 6-A22 is published for corrugated and trapezoidal sheet, with depth quoted up to 162 mm. Stakesys says the EN2 head can turn through 90 degrees so the motor clears an upward corrugation. None of the eight amazon.co.uk bodies here states a profile depth, so a 360° punch is not a 162 mm roofing head. Rotation lets the motor sit to one side on flat sheet. It does not say the die will reach the valley.
Tin snips still suit a short flat flashing. On a deep rib they kink the crown, which is where a profile head earns its place and a flat-head clone may foul. Try the head on an offcut of the same profile.
A long straight rip is a third job. Southern Sheeting says many professionals still use a cold-cutting circular saw once the line runs the length of a sheet. A 20 metre ridge is the saw's work. A 300 mm notch is the nibbler's. Starting that notch is on the how to use a nibbler page.
Edges, chips and the tools in this set
Southern Sheeting says you should treat cut edges that a flashing will not cover, and it points to Tata Steel on edge lacquer, especially in marine air and on low-pitch roofs. This page does not quote a Tata specification number. If the flashing hides the end, the flashing is the cover. If the end stays in the weather, deburr it and coat it. Brush the chips out of the tray and the gutter before you fix the sheet.
A UK roofer reviewing the DEYITONG, at £106.99, used it on cladding and drip flashings and put the bite at about 6 mm. Mark the finished edge, not the middle of that strip. TengXcel reviews, on the £107.99 body, mention cladding and a debris bag. Neither listing states a rib depth. A German review of the LIROPAU describes trapezoidal sheet about 1.2 mm, and the UK review says replacement heads could not be obtained. A punch you cannot buy again fails the job on the second day.
When to hand the sheet to a roofer
Southern Sheeting wants gloves, eye protection, hearing protection and boots, and nobody working alone at height. A sheet on trestles in the yard is not a live roof or a wet scaffold. If you are not set up for work at height, or the weathering depends on a detail you have not drawn, a roofer should take the sheet.
The supply on that roof is on the cordless or mains page. A domestic 13 A extension up a scaffold is the lead site guidance warns against. A pack you already own, or a 110 V tool on a centre-tapped transformer, is the supply you can defend, and the charger stays dry on the ground. One notch on an offcut tells you whether the head clears the rib.
Common questions
Can you cut plastisol roofing sheets with an angle grinder?
No. Colour Clad Profiles says a grinder makes the coating fail and the steel rust early. Southern Sheeting calls angle grinders a strict no because the heat eats zinc and scorches coatings such as HPS and leathergrain. Paint on a scorched edge does not put the zinc back.
Is a nibbler better than snips on a corrugation?
On a deep rib, a profile nibbler usually is, because snips kink the crown. On a short flat flashing, tin snips remain a cold cut. On a long straight rip, Southern Sheeting still sends many professionals to a cold-cutting circular saw.
Will any electric nibbler cross box profile?
No. Hilti quotes trapezoidal depth up to 162 mm on the SPN 6-A22. The amazon.co.uk bodies here do not state a profile depth. A 360° punch sold for flat sheet is not that rating. Try an offcut, and stop if the motor hits the rib.
Do you paint the cut edge on a steel roof?
If a flashing covers the end, the flashing is the cover. If the end stays in the weather, Southern Sheeting says treat it, pointing to Tata Steel on edge lacquer. Deburr first. This page is not quoting a Tata product code.
Are nibblers the right tool for a long roofing rip?
Not by default. Southern Sheeting keeps the nibbler for radii, corners and flashings, and the cold-cutting circular saw for long straight lengths. A notch is the nibbler's job only when the head fits the profile.
Should you use a nibbler alone on a roof?
No, if the work is at height. Southern Sheeting's line is that you do not work alone up there, and that you wear gloves, eye protection, hearing protection and boots. If the weathering detail is beyond the setup you have, hand the sheet to a roofer.
Related pages
Sources
Public UK sources and dealer pages for trade-body context, checked on 19 October 2026. amazon.co.uk prices and review counts are taken from the listings in this category and can change.
- BS EN 62841-2-8:2016, hand-held shears and nibblers (retrieved 19 October 2026)
- Control of Noise at Work Regulations 2005, regulation 4 (retrieved 19 October 2026)
- Control of Vibration at Work Regulations 2005, regulation 4 (retrieved 19 October 2026)
- HSE: electrical systems on construction sites (retrieved 19 October 2026)
- GOV.UK: placing UKCA or CE marked products on the market (retrieved 19 October 2026)
- Heamar: power-tool nibblers (retrieved 19 October 2026)
- Southern Sheeting: cutting metal roofing and cladding (retrieved 19 October 2026)
- Power Tool World: Makita DJN161Z body only (retrieved 19 October 2026)