361
roof structures

363
Roof coverings

351
ceiling constructions

352
Ceiling coverings

353
Ceiling cladding

341
Load-bearing interior walls

342
Non-load-bearing interior walls

343
internal supports

345
Interior wall coverings

331
Load-bearing exterior walls

334
Exterior doors and windows

335
Exterior wall cladding, exterior

338
Sun protection

326
Building waterproofing