Fensterman recommend all windows to be fitted with sills both on the inside and outside.  For a well done work, on sills' installation we use a special coupling profile (SOLBANC).

Internal sills are made of PVC and coated with a protective film which gives both more resistance time, and better aesthetics. All window interior sills are supplied in the color of the joinery.

External sills are made of extruded aluminum and are painted in electrostatic field for a uniform color and durability. All external sills are supplied in white (white joinery) or brown (imitation wood color joinery).