Mass-timber panels want to stay visible and dry — which puts the entire control-layer package on the outside. This system documents the exterior stack: airtight membrane directly on the panel, insulation outboard, WRB, and a ventilated cladding zone, with panel joints and floor junctions taped as the erection sequence allows, not after.
Moisture management during construction is as important as the finished assembly. This is general documentation; project engineering belongs with your design professional of record.
Airtight membrane applied directly to the timber, joints taped during erection.
The full thermal layer rides outside the structure, keeping the timber warm and dry.
WRB and ventilated cavity — the timber never sees bulk water.
Temporary moisture protection for panels between erection and enclosure.
The desk will help sequence the membrane package with your erection schedule.
Ask the Spec Desk