In Poland, a wall plate is a timber beam connecting the roof truss to the top of the walls, but its role depends on the specific structural system. Readers should check the cross-section, anchoring, rafter connections, moisture protection and continuity of insulation at the eaves. The reference point should be the design and the matching fastener documentation, not a photograph from a neighbouring site. Before the eaves zone is covered, the support, condition of the timber and anchor layout should be assessed; doubts are resolved by the structural designer or site manager.

A 40 mm second-grade roof panel requires two assessments: whether it suits the building's conditions and whether its condition allows such use. A low price answers neither question. In a thin panel, the core properties, the facings and the method of support must be checked. Batch defects should be assessed before the final cutting plan is established. In many roof panels, the designation indicates the nominal core thickness at a specific point in the cross-section. The overall height of the element is greater because of the profile of the upper facing. An example variant may be designated 40/80 mm. The dimension on the crest of one panel must therefore not be compared with the core thickness of another without examining the drawings.