361
roof structures

363
Roof coverings

364
Roof cladding

351
ceiling constructions

352
Ceiling coverings

353
Ceiling cladding

359
blankets, other

331
Load-bearing exterior walls

334
Exterior doors and windows

335
Exterior wall cladding, exterior

336
Exterior wall cladding, interior

339
Exterior walls, miscellaneous

321
Subsoil improvement

327
drainage