The builders quoted eight weeks. The renovation took fourteen months, and the owners will tell you the difference is visible in every wall. They had bought a worn apartment in a 1902 building and decided, early, on a rule that shaped everything after: no material pretending to be another material. So the walls are lime plaster, not skim coat, applied in three passes with drying weeks between. The floors are solid oak, laid loose to acclimatise for a month before a single board was fixed.
Almost every shortcut refused was invisible on the day and obvious within a year. Lime plaster breathes, so the old walls stay dry where gypsum would have trapped the damp. The oak was oiled, not varnished, which meant three slow coats instead of one fast one — and means a scratch today is sanded out in minutes rather than living under a plastic film forever. Even the paint waited. The owners lived with bare plaster for a season, watching where the light landed, before choosing anything.
None of this required money so much as sequence. Slow materials cost more in weeks than in kroner, and weeks are what renovations are least willing to spend. But a room built at the speed of its materials wears differently. It ages instead of failing. If you are about to renovate, ask the other question at each decision — not how fast can this be done, but how will this look after ten winters. The answers will slow you down, and you will be glad.