Domakihub How to Cut a Worktop for a Sink: A Clear Step-by-Step Guide
Get a clean, accurate sink cutout in a laminate or solid worktop without cracking the surface or misaligning the template.
Reviewed by Domakihub home & decor pros · 2026-06-23 · 5 min read
Cutting a worktop for a sink is one of the most common kitchen renovation tasks in Greek homes, holiday apartments, and hotel rooms — and it is also one of the most unforgiving: a millimetre off the template or a jigsaw blade that tears the laminate surface means a replacement worktop. The video above by Tommy's Trade Secrets walks through the router-and-template method on a laminate worktop, and this guide gives you the full step-by-step process, the right tool choices for different materials, and the moments where it is smarter to call a professional joiner or plumber instead of pressing on alone.
Which worktop materials can you cut yourself?
Laminate (post-formed or flat-laminate over chipboard) is the most common kitchen worktop in Greece and the most DIY-friendly to cut — a sharp jigsaw blade and a good template are usually enough. Solid wood and bamboo worktops follow the same process but require a finer blade and immediate sealing of the cut edges to prevent swelling from moisture, which is especially important in the humid island climate or near pools in holiday villas.
Compact laminate (Zenith-style, 12 mm solid laminate through its full thickness) and engineered stone such as quartz or granite require diamond tooling and a coolant water feed — these must be cut on site by a specialist worktop fabricator. Do not attempt granite or quartz with a household jigsaw; the blade will shatter the material and void any warranty. If your kitchen has a stone worktop, call the fabricator who supplied it or an experienced kitchen fitter.
What you need to know before you start
Check the manufacturer's cutout template before buying anything. Most inset (drop-in) sinks ship with a card or paper template; undermount sinks require a slightly smaller cutout and a different template. If no template is supplied, place the sink face-down on the worktop and trace 10 mm inside the outer rim on all four sides — this is your cut line, not the rim line. Always confirm the cutout leaves at least 50 mm of worktop material between the cut edge and the front of the cabinet below, otherwise the worktop may flex under load.
Locate and mark any hidden services before cutting. In Greek apartment buildings, gas pipes sometimes run horizontally inside kitchen cabinets at low level; electrical cables can loop up from below. Turn off water at the mains, confirm there are no live cables inside the cabinet with a detector, and never cut without looking underneath first. If a gas pipe is anywhere near the cabinet zone, stop and call a licensed gas installer (αδειούχος τεχνικός φυσικού αερίου) — cutting near gas lines requires a professional.
How to cut a worktop for a sink: 5 steps
- 1
Mark the cutout accurately
Place the sink template on the worktop, centred over the cabinet below and at least 50 mm back from the front edge of the worktop. Tape it down and trace around it with a fine pencil or marking knife. Remove the template and double-check the marks with a square — even 2 mm of skew will be visible when the sink is seated. Mark a small cross at each corner to act as a visual anchor during cutting.
- 2
Drill starter holes at each corner
Select a 10–12 mm spade or Forstner bit and drill a hole just inside each corner of the marked cutout, keeping the hole entirely within the waste area. These holes serve two purposes: they allow the jigsaw blade to enter the material without a plunge cut (which risks cracking laminate), and they prevent the blade from tearing past the corner line. On laminate worktops, place masking tape over the cut line first — this dramatically reduces the surface chipping caused by the jigsaw's upstroke.
- 3
Make the cuts with a jigsaw on a slow, steady feed
Fit a fine-tooth, downstroke (reverse) jigsaw blade rated for laminate — the teeth should point downward toward the sole plate so the upstroke cuts into the surface face, not away from it. Start the saw in one of the corner holes, align the blade on the waste side of the line, and advance slowly and evenly. Support the waste piece with one hand or have a helper hold it from below so it does not drop and crack the front edge of the cut as it falls free. Stop just before each corner, turn the saw off, reposition into the next corner hole, and continue — do not attempt to saw around a tight corner while the blade is running.
- 4
Seal the cut edges immediately
Raw chipboard or MDF core exposed by the cut is highly absorbent and will swell irreversibly if water gets under the sink seal. Apply a continuous bead of clear waterproof silicone sealant around the entire cut edge and allow it to skin over (about 15–20 minutes) before fitting the sink. For solid wood worktops use a waterproof wood oil or decking oil on all cut surfaces, then allow to dry fully before installation. This step is non-negotiable in kitchens near the sea or in buildings with high ambient humidity.
- 5
Test-fit the sink and complete the seal
Lower the sink into the cutout dry, without any sealant, to confirm the fit and check that the rim sits flat on the worktop surface with no rocking. Remove the sink, run a fresh bead of food-grade silicone around the top of the cutout rim, and lower the sink back into position. Tighten the mounting clips from underneath — work in a star pattern (front, back, left, right) rather than tightening one side fully first, to ensure even clamping pressure. Wipe away any sealant that squeezes out immediately with a damp cloth and allow 24 hours before connecting the plumbing and running water.
Rather have a pro handle it?
Get a vetted renovation pro in your city — one number, booked in EN/EL/DE.
FAQ
- Can I cut a granite or marble worktop for a sink myself?
- No. Natural stone and engineered quartz require diamond-tipped wet cutters with a continuous water feed to prevent overheating and cracking. The cutting must be done by the worktop fabricator or a specialist stone cutter. Attempting this with a standard jigsaw will shatter the slab and almost certainly void any warranty. Contact the supplier who fitted the worktop and ask them to cut the sink opening before final installation if possible.
- My inset sink is slightly too big for the cutout I made — can I widen it?
- Yes, carefully. Use a jigsaw or a small router with a straight bit to shave thin amounts off the cut edge, working in 1–2 mm passes. Test-fit after each pass. Never try to enlarge the cutout by more than 5–6 mm in total on any side; if the gap between the sink rim and the cut edge becomes greater than the rim overhang, the sink will not seat properly and the joint cannot be sealed reliably. If significant material needs to be removed, you have likely used the wrong template — check the manufacturer's specification sheet before cutting further.
- Do I need a plumber to connect the sink after cutting?
- In Greece, connecting a standard kitchen sink to the existing cold water supply and the waste drain does not legally require a licensed plumber (υδραυλικός) — a competent DIYer or handyman can do it. However, if the job involves moving the waste pipe, extending water supply lines inside the wall, or touching any hot-water boiler connections, a licensed plumber is strongly recommended. For gas hobs installed alongside the sink, a licensed gas technician is legally required for any gas connection.