The house from inside

• With a mouse: click inside the room. The browser then captures the mouse and you look around with it. Esc releases the mouse again.
• With a keyboard: W A S D walks, and the arrow keys turn.
• On a phone or tablet: hold your finger on the ring at the bottom left to walk, and drag anywhere else to look around.

You cannot walk through the walls, and you cannot get outside: nothing has been built behind the doorway yet. If you switch off the surface, the walls are still there - you can just see through them.

A room in 3D looks authoritative even when the numbers were simply chosen. That is why it says here where each dimension comes from.

Width — 4,00 m

ARBITRARY: 4.00 m. The Danish building regulations (BR18) set no minimum width for a room — the requirements are functional ones about daylight and air change. The number was chosen so the room can be walked around on a phone screen, and it is not a professional claim.

Depth — 5,00 m

ARBITRARY: 5.00 m. Same reasoning as the width. The room is a practice space for walking and looking around, not a designed room.

Ceiling height — 2,50 m

ARBITRARY: 2.50 m. BR18 § 205 (chapter 9, retrieved 02-09-2026) is a FUNCTIONAL requirement with no figure in metres: «Habitable rooms and kitchens must have a ceiling height that provides sufficient daylight in the room.» There is therefore no number to cite, and this one is our own choice.

Doorway — 0,77 m

BR18 § 208 (chapter 9, retrieved 02-09-2026): «Doors to porches, entrance halls, corridors, habitable rooms, kitchens, bathrooms and toilets on the dwelling's entrance storey must have a clear passage width of at least 0.77 m.» ⚠️ That is the MINIMUM requirement and not a typical door size — an ordinary door is wider.

A wall is not one single piece. Behind the plasterboard sit the carpenter's studs, the electrician's cables, the plumber's pipes and the insulation - and above the ceiling the rafters rise into the roof build-up. The buttons below the room switch each layer on and off, so you can see the place a student otherwise never gets to.

Surface

The plasterboard on the walls and ceiling. Switch it off and you can see into the wall and up into the roof.

Ledninger

The electrician's cables in the cavity. The colours are the real ones: brown, blue and green/yellow.

Pipe

The plumber's copper heating pipes, flow and return through the same cavity.

Insulation

The mineral wool between the studs and above the ceiling. It is what keeps the heat in.

Rafters and studs

The carpenter's timber frame: the studs in the wall and the rafters that carry the roof.

Roof

Underlay, counter battens, battens and roof tiles - the whole roof build-up above the rafters.

Every dimension in the house is either taken from a source, or it says for itself that it was chosen. There is nothing in between - a guessed dimension looks exactly as convincing as a real one.

De to tabeller herunder er huset som det står, når du kommer ind. Bygger du om, står dine egne mål i panelet under rummet — delt op på præcis den samme måde.

Figures with a source

Plasterboard — 12,5 mm

Discebo, carpentry article «energikrav-br18» - the fully worked timber frame wall has 12.5 mm plasterboard (lambda = 0.22) as its innermost layer. The article's own source: BR18 chapter 11, sections 250-298, verified via bygningsreglementet.dk.

Stud centre distance — 600 mm

Discebo, carpentry article «centerafstand-cc», the table «Typical cc values»: studs in a lightweight frame wall 0.45 or 0.60 m, tied to the width of the plasterboard (900/1200 mm). The article's own source: Gyproc/Saint-Gobain and Knauf Danogips installation guides.

Insulation in the external wall — 195 mm

Discebo, carpentry article «energikrav-br18», the fully worked timber frame wall: 195 mm mineral wool (lambda = 0.036) gives U = approx. 0.17 W/m2K. The article's own source: BR18 chapter 11, sections 250-298.

Thermal conductivity of the mineral wool — 0,036 W/(m·K)

Discebo, carpentry article «energikrav-br18» - the thermal conductivity of the mineral wool in the wall example. The article's own source: BR18 chapter 11 and the U-value formula R = d/lambda.

BR18 requirement for the external wall — 0,3 W/(m²·K)

BR18 sections 250-298 (chapter 11), reproduced in Discebo's carpentry article «energikrav-br18»: external wall in new construction U <= 0.30 W/m2K. Verified via bygningsreglementet.dk.

BR18 requirement for roof and ceiling — 0,2 W/(m²·K)

BR18 sections 250-298 (chapter 11), reproduced in Discebo's carpentry article «energikrav-br18»: roof/ceiling against an unheated space U <= 0.20 W/m2K. Verified via bygningsreglementet.dk.

Rafter centre distance — 600 mm

Discebo, carpentry article «centerafstand-cc», the table «Typical cc values»: roof rafters typically 0.60-1.0 m, governed by the roof covering, the snow load and the rafter type. 600 mm is the close end of the range. The article's own source: Traeinformation (trae.dk) and the manufacturers' laying instructions; the final cc comes from the structural calculation.

Ventilated gap beneath the battens — 25 mm

Discebo, carpentry article «tagopbygning-undertag-laegter»: the counter batten lifts the battens clear of the underlay and creates a ventilated gap, normally at least 25 mm. The article's own source: BYG-ERFA experience sheets on underlays, eaves and ventilation, plus the manufacturers' laying instructions.

Batten spacing for clay pantiles — 375 mm

Discebo, carpentry articles «centerafstand-cc» and «tagopbygning-undertag-laegter»: for clay pantiles in standard format the maximum batten spacing is typically around 340-375 mm. The articles' own source: the manufacturer's laying instructions (Randers Tegl/Hoejslev, Wienerberger).

Flow pipe, copper — 22 mm

Discebo, plumbing article «water velocity in pipes» (the DS 439:2024 chain): the distribution run is calculated on copper 22 x 1.0 with an internal diameter of 20 mm. The pipe series is DS/EN 1057.

Return pipe, copper — 15 mm

Discebo, plumbing article «water content in pipes», the copper table following DS/EN 1057: 15 x 1.0 - the smallest dimension in the house's own table, used as the branch/return pipe.

Conductor for the lighting circuit — 1,5 mm²

Discebo, electrical article «current-carrying capacity», the Iz0 extract from DS/HD 60364-5-52 table B.52.4 (PVC, copper, 2 loaded conductors): 1.5 mm2 is the smallest domestic cross-section in the table and is used for lighting circuits.

Conductor for the socket circuit — 2,5 mm²

Discebo, electrical article «current-carrying capacity», the Iz0 extract from DS/HD 60364-5-52 table B.52.4: 2.5 mm2 Cu is the fully worked example of a dwelling's socket circuit (16 A).

Figures we chose ourselves

Ridge height above the rafter foot — 1600 mm

ARBITRARY: 1.60 m from rafter foot to ridge. The roof pitch is CALCULATED from it (Pythagoras, as in the house's own article «spaerlaengde-pythagoras») and is therefore not asserted in itself. The minimum permitted pitch is product-specific and is stated in the roof tile's laying instructions - there is no single figure to cite.

Cross-section height of the rafter — 170 mm

ARBITRARY: the cross-section height of the rafter in the figure. The house's carpentry article «baerende-traekonstruktioner» states explicitly that cross-section, span and centre distance belong to the structural calculation under Eurocode 5 - there is no single figure to cite.

Height of the cables above the floor — 300 mm

ARBITRARY: the height above the floor at which the socket circuit is drawn. There is not - and I have not been able to find - a citable Danish rule for installation zones or mounting heights in a dwelling. DS/HD 60364-5-52 deals with sizing, not with placement. See the point raised for Casper in the report.

Height of the pipes above the floor — 250 mm

ARBITRARY: the height above the floor at which the heating pipes are drawn. The DIMENSION of the pipes is sourced (DS/EN 1057), but their routing height in an arbitrary room is not a standard.

Thickness of the conductors in the figure — 14 mm

ARBITRARY: the conductors are drawn MUCH thicker than they are, so they can be seen inside a cavity on a phone screen. A 1.5 mm2 conductor is about 1.4 mm in diameter. The figure is a drawing scale, not a cable dimension.

Under rummet står byg-knapperne. Du kan sætte en ekstra væg op — på tværs eller på langs — og bestemme om der skal være en døråbning i den. Du kan lægge et andet tag på og rejse det højere eller lavere. Væggen er din: du kan gå ind gennem åbningen, og du kan ikke gå gennem selve væggen.

Huset bliver husket på din egen skærm, så det står der næste gang du kommer. Det bliver ikke sendt nogen steder hen, og der er ingen der kan se det andre steder fra.

Og målene følger med: dit hus har de samme to slags tal som tabellerne herover. Ændrer du taget, bliver hældningen regnet om — men den bliver ved med at stå i bunken «valgt af os», fordi den er regnet af en højde vi selv har fundet på.