Reference ToolIndicative tool · BS EN 1995 / Eurocode 5 timber shrinkage & settlement
Estimate timber-frame settlement relative to a surrounding masonry skin. Set storeys, plates and floor zones; get the movement at every cill and at the eaves.
Trusses bear on the top rail + head plate only.
Clay brick expands over time; concrete blockwork shrinks, so no rise is taken for block (its shrinkage is ignored, which is cautious).
Size is the plate's depth across the grain. All timber is taken to settle at 12% in service; check the delivered moisture content of treated sole plates where you can.
The filler or sealant can't compress to nothing, so its fully-compressed thickness is added to the movement (STA guidance; NHBC Table 1 allows 2 mm). Use your product's figure. The extra allowance is optional, for construction tolerance.