Rationel FORMA – Top-guided window

The Rationel FORMA wood top-guided windows are outward opening. The Rationel FORMA windows consist of solid wood from the very innermost structure through to the external.

Rationel FORMA window system comes with angled glazing bead and ovolo moulded profile making it an ideal choice for country-style and traditional designs. Windows are made to measure and come in a large range of opening functions. Rationel FORMA range is available with or without glazing bars which particularly suits this style of windows and an extensive range of colour choices are available. It is available in either double or triple glazing, and has been designed to exhibit the very best in energy efficiency. Made from sustainably sourced timber, your windows and doors will last for decades if looked after.