Parapet wall:

The top section of a wall extending above the line of a roof or gutter.

Partition:

An internal wall dividing two rooms, either of solid or timber construction, and either load bearing or non-load bearing.

Pebble dashing:

A type of rendering where pebbles or small stones are embedded in the cement compound.

Pier (or column):

A vertical pillar of masonry providing support for a structure above.

Pitched roof:

A sloping roof, usually covered with tiles or slates.

Plinth:

A course of stone or brickwork projecting out from the base of the wall, built up from the foundation.

Pointing:

The outer face of mortar joints applied with a trowel.

Pre-cast concrete:

Concrete units which are factory made, such as paving flags or coping stones.

Principal rafter:

The main sloping member of a roof truss, following the pitch of the roof and often providing intermediate support for horizontal beams or purlins.

Purlin:

A horizontal beam in a roof supported by a roof truss, or extending between two supporting walls.