On top or underneath: the worktop decides
Blanco is a German brand with sinks in stainless steel and in a granite-based composite, and many models come in two versions, inset and undermount. An inset sink sits on the worktop by its rim and suits almost any surface. An undermount is fixed from below, which leaves the cut edge exposed.
That is why undermount sinks go into stone, quartz, compact laminate or solid wood sealed with oil or lacquer. Chipboard laminate with a bare edge around the bowl will swell sooner or later, however much sealant goes on.
A stone worktop for an undermount sink is usually cut and polished in the workshop that made it. On site, the fitter mounts the sink on its brackets with adhesive sealant and connects the waste. Find out in advance who is responsible for the cut-out, so it is not a question on installation day.
Blanco composite sinks often come with their own waste and overflow. Check it is in the box, and do not throw away the little bags of washers.
Rather hand the job over? More here: worktop fitting in Warsaw.
Where it goes wrong
- Ordering an undermount sink for a laminate worktop.
- Not telling the stonemason the exact sink model, so the cut-out is made for a “similar” one.
- Loading the bowl with dishes before the sealant has cured.
- A trap that hits the cabinet floor and blocks the drawer.
Blanco kitchen sink installation: getting ready
- Know what the worktop is made of and who does the cut-out.
- Keep the sink, tap, waste and instructions nearby.
- Empty the sink cabinet.
- Photograph the worktop and the pipes.
The water goes off before work starts. If the valves under the sink do not hold, say so beforehand.
From real jobs: before and after
Photos from real jobs booked through the HandyMan24 app: undermount sinks in a quartz worktop, still without a tap. The handymen connected the taps and traps.




Completed job
Three flats for a design studio: kitchen appliances and taps
Warsaw
- taps and waste traps fitted at the sinks
- cooker hood installed
- induction hobs and ovens connected
- dishwashers and washing machines connected
How to book it
In the app, give the sink model, the fitting method and the worktop material, and add photos. Tradespeople who take this kind of job in Warsaw, Śródmieście included, send bids with their price and timing. You compare price and reviews, and only the person you pick gets your number and address.
You pay the fitter directly and they issue the invoice. The sink, tap, waste kit and sealant are not part of the labour, and neither is taking the old sink away. The fitter answers for their own installation and redoes it if needed; a cut-out made by someone else, or the worktop itself, is not on them.
Order in the app
Describe the job, add photos and the address. Tradespeople send their own prices and dates, and you pick one of the offers.
Open the app






