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Floor connections / Door sills


The threshold is one of the most vulnerable parts of an entrance door. In particular, the threshold requires high levels of weather tightness and thermal performance. RAICO has chosen a totally new path to address these problems, and has developed a completely new threshold concept, resulting in an even higher level of impermeability.

Innovative threshold concept

The door threshold needs to ensure perfect weather tightness. With its excellent insulation within the threshold area, reliable protection against driving rain and draught is guaranteed, reducing expensive heat losses. The low profile ensures comfortable barrier free access.

  • Highest degree of weather tightness
  • Barrier free accessibility
  • Retro fit exchangeable threshold connector – easy assembly
  • Thermally separate aluminium threshold with replaceable gasket
  • Threshold base structure options

Thermal insulation

  • Incremental adjustment of insulation values – to meet the project specific requirements
  • Featuring UD values down to 0.69 W/(m2K) for use in passive-houses


Without insulation insertion
down to Uf
  inward outward inward outward
Without insulating block rebates 2.1 2.3 2.2 2.3
Insulating block glazing rebate 2.0 2.2 2.1 2.2
With insulation insertion
down to Uf
Without insulating block rebates 11.7 1.9 1.8 2.0
Insulating block glazing rebate 1.6 1.7 1.7 1.8