What an internal elevation is, and why a tiler needs one

A floor plan shows you where the bathroom goes. An internal elevation shows you what happens on each wall.

That distinction matters more than it sounds. When a tiler steps on site, the floor plan tells them the room dimensions. It does not tell them where the niche sits, how high the tiles go, where the shower screen starts, or which corner they are tiling into. For all of that, they need an internal elevation.

What an internal elevation actually is

An internal elevation is a straight-on view of a single wall, drawn to scale, as though you are standing in the middle of the room looking directly at it. There is no perspective, no distortion. Every element on that wall is drawn at its correct height and position.

A bathroom has four walls. A complete set of internal elevations covers all four, so every trade working in that room has a document they can read without guessing.

What a bathroom elevation shows

A properly drawn internal elevation includes:

• The wall height and the extent of tiling: where tiles start and where they finish
• Fixture positions and heights: tapware, shower rose, towel rails, toilet roll holder
• Niche size, height and position, including whether it falls within a full tile course
• Shower screen type, height and which wall it returns to
• Vanity dimensions, benchtop height and the splash zone above
• Mirror or cabinet position
• Any bulkhead or step in the ceiling that affects the wall finish

That last item matters more than most people expect. If a bulkhead drops over the vanity wall, the tiler needs to know before they set out their tiles, not on the day they start laying them.

Why a tiler specifically needs one

Quoting. A tiler cannot price a bathroom accurately from a floor plan alone. They need to know the tiled surface area on each wall, where the cuts fall, how many niches are in scope, and whether exposed corners require trim. An elevation gives them all of that. Without one, they are estimating. A conservative estimate costs the client; an optimistic one costs the tiler.

Tile setout. Setting out a bathroom is not a matter of starting at one corner and working across. A good tiler will plan which tile is centred on the feature wall, how the courses align relative to the niche, and whether the top course breaks out as a full tile or a thin cut. All of that is worked out from the elevation before a single tile is scored. Getting it wrong on a tiled shower means cutting again, which means waste and time.

Avoiding disputes. If a client expected the niche at eye level and it goes in at knee height, someone is paying to move it. The internal elevation is the document where everyone agreed on position before work started. When the tiler, the builder and the client have all seen and confirmed it, there is no argument on site.

Why a builder should care

The tiler is not the only person reading these drawings. The waterproofer needs to know the shower extent. The electrician needs the heated towel rail position. The plumber needs tap heights so the wall penetrations land correctly. One set of internal elevations coordinates the whole team from the same document.

Without them, that coordination happens in conversations on site, which means it happens differently each time. That is where bathrooms get expensive to fix.

What Form & Fixture produces

Every bathroom package from Form & Fixture includes internal elevations for all four walls, drawn to scale with every fixture, niche, tile extent and fitting positioned and dimensioned. They come alongside the scaled floor plan, reflected ceiling plan and FF&E schedule, giving a builder the full documentation set before the first subcontractor steps on site.

The floor plan shows how the room was approved. The elevations show how it actually gets built.