Timber frame insulation is not a question of how to hide the beams. It is a question of how to preserve the beams while creating a continuous thermal, air, moisture, and protection strategy around them.
That is a meaningful distinction in a Massachusetts post-and-beam or timber-frame home. The visible structure is often the reason the house was chosen: hand-finished oak, deep roof slopes, joinery that remains part of the room, and a vaulted interior that does not feel like any conventional ceiling. When winter drafts appear, rooms become difficult to heat, or the roof deck shows frost or staining, the understandable impulse is to ask which insulation can fit between the rafters.
