All Rationel windows are fitted with highly energy efficient glazing, with a warm edge spacer fitted as standard to help reduce cold bridging. Environmentally friendly argon gas is filled between the glass panes to reduce heat loss and a think transparent metal film is applied to the internal pane to help prevent heat from escaping out of your room.
Available in a wide range of options including obscured, acoustic coloured, enhanced security and much more, find out more below.
Rationel OBSCURE is designed to restrict the view into the private areas of your home, perfect for bathrooms. The obscure glazing is placed on the inside of all glazing panels ensuring they are easy to clean.
External noise can play a large factor on the quality of your daily life, Rationel sound control glass can help to keep the noise out by reducing sound transfer from outside by over 10db compared to a standard double glazed window.
Rationel SOLAR glass helps prevent overheating as a result of sunlight falling directly onto a window. It’s often installed in office buildings which feature large glazed facades, but is also ideal for any south or west-facing façade in a family home. Rationel SOLAR Green and Grey feature tinted glass which reduces the amount of light and heat coming into a building.
Most burglars enter the home through an easily accessible window or patio door, which underlines the importance of window security. Rationel SECURE laminated safety glass is designed to resist forced entry and can therefore deter a thief from attempting to break into your home.
The level of sun protection provided by a window is determined by the amount of sunlight and the amount of the sun’s heat that are allowed to pass through the glazing. Sunlight is known as the Light Transmittance (LT-value) and the heat is known as the Solar Heat Gain (g-value). Other factors that may be considered are Energy Absorption (EA) and Energy Reflection (ER), these are the percentages of solar radiation absorbed by the glazing and the solar radiation reflected by the glazing.
*= LT-value **= g-value
In comparison, a standard non-solar glazing would offer in the region of 74% light transmittance and 53% solar gain.
NOTE: All examples for triple glazed window elements.
– Best performance: 0.79 W/m2 K U-value
– 42 dB Rw sound reduction
– Best performance: 1.29 W/m2 K U-value
– 40 dB Rw sound reduction