An integrated basin looks simple on a drawing: one slab, one shallow bowl, no visible seam. That simplicity is exactly why it goes wrong so often. The basin is not a separate item you buy and ｄｒｏｐ in place — it is part of the counter itself, so whoever forms it has to get the material, the fall to the waste, the tap set-out and the shipping method right at the same time. When you shortlist manufacturers for this product, you are really shortlisting the workshop that will mill the whole vanity top to your dimensions.

The notes below are the checks we apply when a buyer or specifier brings us an integrated basin package for a villa or apartment bathroom. They work as a screening list for any supplier conversation.

1. Confirm they actually form the basin, not just cut a hole

Ask plainly whether the basin bowl is formed from the same block or slab as the counter, and how it is finished. An integrated basin in our Countertops & Basins range is made to measure, with the material, finish and layout specified per project — which is the point you want confirmed in writing from any supplier. Some workshops instead rebate a pre-formed bowl into an engineered stone top and call the result integrated. That is a different product with different failure modes: the joint line is where limescale, silicone failure and discolouration start.

Ask for two photographs of a basin they have finished themselves — one dry, one wet after use — so you can see the internal corner radius and the water behaviour at the edges.

2. Test their drawing discipline before you discuss price

A manufacturer who is comfortable with this product will send back a fabrication drawing, not just a quotation. That drawing should show:

• overall counter length, depth and thickness, plus the splashback return if one is required;
• bowl position from both datum edges, internal radius at each corner, and the depth of the bowl;
• the fall toward the waste and where the waste outlet sits relative to the vanity carcass;
• tap and waste hole set-out, including whether holes are drilled in the top or in the wall;
• cut-outs for any wall-mounted basin mixer or spout.

If a supplier quotes a fixed "standard size" without asking for your vanity module and mirror position, treat that as a warning sign. Integrated tops are fabricated work; a catalogue dimension will not clear an existing niche.

3. Compare material options against how the bathroom is used

Ask which materials the workshop can form and finish, and get samples of the exact finish you are specifying, not a generic swatch card. Engineered stone, marble and other natural surfaces behave differently at the bowl: etching, staining and edge chipping are all finish-dependent. Our stone & marble surfaces page exists for exactly this conversation — material selection with the project dimensions attached, rather than a colour chosen from a distance.

For guest bathrooms and powder rooms where the counter is largely decorative, appearance can lead. For a family or hotel-guest bathroom used several times a day, ask how the finish holds up to toothpaste, aftershave and daily cleaning products before you commit.

4. Decide the installation type early, because it changes who you talk to

Integrated is not the only way to combine a top and a basin, and shortlisting goes faster once the team agrees on the type:

A supplier who can supply all four lets you keep one accountable vendor across the bathroom package. A supplier who only does one is fine — but then someone else owns the interface, and interfaces are where claims get argued later.

5. Check they coordinate the rest of the wet wall

The basin rarely fails on its own; it fails at an interface with something another trade supplied. When you review a shortlist, ask whether the same manufacturer can also supply or coordinate the vanity carcass, mirror cabinet, taps and shower set. In our range that coordination runs from integrated countertop vanities through to a rainfall shower system with handheld sprayer, so the heights, reach and finishes are matched on one drawing rather than reconciled on site.

6. Ask how it travels and how it is packed

A formed stone top is the most fragile item in the bathroom package. Ask specifically about crating, edge protection, whether tops travel flat or upright, and how pieces are numbered against the room schedule. For an overseas order this matters more than the unit price: a replacement fabrication usually costs the same again plus the delay, and the second piece has to match a finish already installed elsewhere in the project.

7. Verify after they have made one for someone else

Before you place a trial order, ask for:

• two or three completed bathroom packages from comparable projects — villa, apartment or hotel guest room;
• the fabrication drawings those packages were built from, with the finished photographs alongside;
• a written statement of what is included in the price: fabrication, drilled holes, waste fittings, sealing, spare parts.

If a supplier cannot show drawings next to finished work, they are reselling someone else's fabrication. That is not automatically disqualifying, but it means your dimensions pass through an extra pair of hands.

A shortlist score you can use in one call

Score each candidate from 0 to 2 on six points: formed basin versus inserted bowl; fabrication drawing returned without being chased; material sample of the exact finish; coordination with vanity, taps and shower on one drawing; crating method explained in detail; finished project photographs matched to drawings. Anything under 9 out of 12 needs a trial order before it goes anywhere near a live bathroom.

SANTERSON has manufactured furniture and building materials since 2008, with custom sizing and finish selection handled through our custom furniture materials and finishes service, with freight by sea, air or rail and door-to-door delivery arranged under our furniture logistics and door-to-door delivery service. Send us the bathroom elevation, the vanity module dimensions and your preferred finish, and we will come back with a fabrication drawing for the top before any price is agreed.

Talk to PHILLIP about your bathroom package, or send your drawings through the SANTERSON enquiry form.