Sales of building materials:
- concrete products
mortar mixtures and binders
- blocks and bricks
- heat insulation
- thermal insulation systems
- building chemistry, paints
- plasterboard
- building timber, OBS boards
- chimneys
- sewerage and drainage
- waterproofing materials, roofing
- door frames, doors
- metallurgical material - ribbed steel, concrete nets
- tiling and paving
- tools.