Why junctions decide how a renovation looks
Junctions between materials, where floor meets wall, parquet meets tile, tile meets plaster, a door frame meets the wall, decide whether a renovation looks expensive more than the materials themselves. They need to be located on the plan, detailed one by one and signed off before anything is bought, not left to the installer's judgement on the day.
Expensive parquet with an aluminium threshold strip sticking up at the bathroom door and the perimeter gap hidden by a chunky skirting board full of nail heads looks worse than mid-range parquet with neatly resolved transitions. Getting it right costs almost nothing if it is thought through early, and a lot if it comes up once the floor is down.
Where to find junctions on the plan
Take the floor plan and mark in colour every point where the flooring changes: the entrance, the kitchen-living boundary, each bathroom threshold, the way out to the balcony or terrace. Then mark where wall finishes stop: the tile edge in the bathroom, the kitchen splashback, the lining around a shower niche. Add every door and every place where joinery meets wall and floor: fitted wardrobes, the kitchen plinth, a wall-hung bathroom vanity.
A mid-sized flat easily has several dozen of these points. Each one needs answers to three questions: at what level do both materials finish, how is the transition closed or trimmed, and which trade does it last.
Floor to floor: levels are resolved in the screed
Parquet on underlay, tiles on adhesive and microcement all have different thicknesses. For them to meet flush with no threshold, the difference is taken up in the screed: higher under tiles, lower under parquet. That has to be known before the screed goes down, so floor finishes need choosing earlier than most people expect.
The transition itself can be a slim metal profile in brass or stainless steel, flush with both floors, or no profile at all if the materials allow. Parquet needs an expansion gap because timber moves with humidity; where it meets tile, that gap is hidden inside the profile, not filled with sealant.
Herringbone parquet, as in the Urgel flat in the Eixample, adds one more task: the pattern has to finish cleanly at the threshold without thin slivers. So the set-out starts from the flat's main axis, and doorways often get a border strip or a change of direction.
A level-access shower is a case of its own. The shower floor must fall towards the drain while the rest of the bathroom stays flat. A linear drain along the wall allows a single fall and lets you lay tiles without diagonal cuts. Waterproofing runs up the walls and under the threshold, and it is checked before any tiling.
Floor to wall and wall to wall
Skirting can be surface-mounted, flush with the wall or concealed with a shadow gap. The last two look cleaner, but they must be planned before plastering: the wall needs a recess or a profile for the skirting. Once the walls are painted, that decision is gone.
Where wall tiling ends and plaster begins, you need either a profile or a clean edge flush with the plaster. External tile corners are either mitred at 45 degrees or finished with a metal trim, and the two differ in both look and price.
Concealed doors are the most demanding case. In the 250 m² child psychology centre in the Eixample we fitted 24 concealed doors, and on each one the frame, plaster and paint had to meet in a single plane with no gap. Details like these are resolved on the drawing and checked on the first door before the rest go in.
The order: drawing, sample, first section
Every significant junction needs a simple drawing or a dimensioned photo sketch, and for visible spots, a sample. Approved details go into the project documents so the tiler, floor layer, plasterer and joiner are all looking at the same thing. The first completed example of each type is checked before it is repeated across the flat: fixing one threshold is easy, fixing fifteen is expensive.
On our projects one person is responsible for these decisions, our own crew does the work, and joinery and specialist tasks go to trusted subcontractors. Send us the plan and the list of materials you have chosen, and we will reply within an hour.