If you like to have second floor / loft through part or entire of your design, there are two possibilities:
- Hidden joist;
This design is similar to conventional houses with 2x10 or
engineered I-beam floor joist. The advantage to have this
type of floor is to have space to carry the duct system as
well electrical and plumbing hardware. Also this design
provide better cavity to have improved sound insulation
quality. However, it is not very common for timber
framing houses. If you would like to have this design with
timber framing look, you may add False joist over finished ceiling.
- Exposed Joist:
This is more traditional design. It can be very attractive by having natural colour contrast
between selected material. Also this design is more cost efficient since ceiling on the first
floor is the same material as the finish floor on second floor. This design need special
attention to accommodate the wiring through the walls. Duct system and plumbing can be
don through designated closet between the floor.