Scandinavian Design
FORMA & FORMAPLUS
The FORMA range from Rationel is available in timber both internally and externally giving the look and feel of traditional windows both inside and out whilst achieving all the advantages of more modern windows such as enhanced energy efficiency and lower maintenance.
The FORMA+ range is similar in design to the FORMA range achieving a traditional look similar to that of older timber window however is fitted with external aluminium capping for added protection ensuring minimal maintenance.
Classic Styling Modern Technology
FORMA & FORMAPLUS
The FORMA range from Rationel is available in timber both internally and externally giving the look and feel of traditional windows both inside and out whilst achieving all the advantages of more modern windows such as enhanced energy efficiency and lower maintenance.
The FORMA+ range is similar in design to the FORMA range achieving a traditional look similar to that of older timber window however is fitted with external aluminium capping for added protection ensuring minimal maintenance.
The FORMA and FORMA+ range is available without and with a full range of glazing bars, enabling you to custom design your window style to fit perfectly with your property. Also available is terrace and entrance doors with timber infill and glazed panels. Windows and doors can be joined in multiple for more complex glazing situations.
Forma
– Timber frame
– 60-year life expectancy
– Over 200 colours available, with no extra charge for dual colour*
*When choosing from our standard colour range
The FORMA window is a solid timber window manufactured from both timber internally and externally achieving excellent thermal and acoustic properties. Available in both double and triple glazing.
Formaplus
– Aluminium-clad timber frame
– Low-maintenance
– 83-year life expectancy
– Over 200 colours available, with no extra charge for dual colour*
*When choosing from our standard colour range
The FORMAPLUS is a solid timber window with an external aluminium capping offering excellent durability to the outside giving an increased life expectancy.
Product Details
Designed to complement traditional British architecture, look no further than FORMA and FORMAPLUS. Beautifully styled, these designs bring the classic into the current day to create a finished look that’s simply transformational. It’s sheer sophistication, reimagined.
Both options work to bring a softer line to your windows, helping your project to blend more seamlessly into its surroundings. Available with or without glazing bars which particularly suits this style of windows.
Classic profile
Internally a classic profile that can be found on much more traditional windows is found, adding character and charm to your home.
Classic Style
Classic styled glazing bara giving a traditional feel and adding style to your home.
Angled glazing bead
Angled glazing bead similar to those found on much older timber windows give an authentic look and feel.
Opening Functions
Rationel windows are available in a wide range of configurable options ensuring there is a solution for every requirement. With a wide range of opening types, the you have the option to choose a single opening type or combine multiple to create your perfect window.
As with the majority of our products child restrictors can be added for increased safety as well as high security locking. Some open types support 180 rotation so that you can easily clean your windows from inside your home.
Fixed Light
- Min. width: 250mm
- Min. height: 250mm
- Max. width: 2998mm
- Max. height: 2998mm
Top Guided
- Min. width: 358mm
- Min. height: 380mm
- Max. width: 1798mm
- Max. height: 1598mm
Side Hung
- Min. width: 358mm
- Min. height: 358mm
- Max. width: 948mm
- Max. height: 1798mm
Top Swing
- Min. width: 558mm
- Min. height: 548mm
- Max. width: 1598mm
- Max. height: 1598mm
Side Guided
- Min. width: 450mm
- Min. height: 438mm
- Max. width: 998mm
- Max. height: 1798mm
Side Swing
- Min. width: 478mm
- Min. height: 530mm
- Max. width: 998mm
- Max. height: 1798mm
Entrance Door
- Min. width: 658mm
- Min. height: 1708mm
- Max. width: 1198mm
- Max. height: 2498mm
Patio Doors
- Min. width: 658mm
- Min. height: 1708mm
- Max. width: 2328mm
- Max. height: 2498mm
Panelled Door
- Min. width: 648mm
- Min. height: 1708mm
- Max. width: 1198mm
- Max. height: 2398mm
Window Door
- Min. width: 508mm
- Min. height: 1708mm
- Max. width: 2337mm
- Max. height: 2398mm
Colours
Customise the look of your new window with the wide range of standard and bespoke Rationel colours.
All Rationel products are available in a wide range of customisable options with the colour palette being no exception. Available in a wide range of standard, Custom RAL and granite colour options there is sure to be an option for every individual taste and project requirement.
Take a look below to look through some of the specially selected colour options that will work perfectly with contemporary and traditional homes alike.
RAL 9010
Pure white
RAL 9001
Creme
RAL 9003
Signal white
RAL 9002
Grey white
RAL 7035
Light grey
RAL 7044
Silk grey
RAL 7038
Agate grey
RAL 9007
Grey aluminium
RAL 7038
Stone grey
RAL 7038
Dusty grey
RAL 7038
Silver grey
RAL 7038
Slate grey
RAL 7012
Bastalt grey
RAL 7016
Anthracite grey
RAL 7013
Brown grey
RAL 1035
Pearl beige
RAL 7032
Pebble grey
RAL 7006
Beige grey
RAL 7022
Umbra grey
RAL 6003
Olive green
RAL 8017
Chocolate
RAL 8019
Grey brown
RAL 7024
Graphite grey
RAL 9004
Signal black
RAL 7021
Black grey
RAL 8022
Black brown
RAL 9005
Jet black
Glazing Options
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.
OBSCURE
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.
Satin
A modern sandblasted effect.
Cotswold
A simple patterned glass.
Listral D
Ornamental glass created by continuous rolling
Silvit
A more detailed patterned glass.
Crepi
A timeless frosted privacy glass.
Small Cathedral
A traditional patterned glass.
Acoustic
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.
Keep noise out
Sound is measured in decibels (dB) with zero decibels (0db) being the faintest sound detected by ‘normal’ hearing. Sound measured at 120-130db can cause pain and potential hearing damage.
How a noise reducing window works
The level of acoustic insulation depends on the number of glass panes used in the window, the thickness of each glass pane, the combination of panes and the distance between them.
Frame is as important as glass
While glass is a good sound insulator it’s not enough on its own – the entire frame also contributes to noise reduction, with its impact dependent on factors such as the number of opening units, window size and joint construction.
Solar
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.
Multi-functional glass
By minimising the impact of direct sun Rationel SOLAR glass delivers a range of benefits including preventing glare, helps to control indoor temperature and helps to improve energy bills.
Alternative sun protection
If only occasional sun protection is required, alternative strategies include: Shutters, Awnings, Overhanging eaves or roofs, Strategic garden planting and Curtains or other shading solutions
External or internal shading?
If you opt for internal shading solutions, such as curtains, remember that the sun’s rays will still penetrate through the window and heat the room before they are reflected, which is why external shading is a more effective way to reduce the sun’s impact.
SECURE
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.
Laminated glass to deter break-ins
While laminated glass is no guarantee against forced entry, it can provide a sufficient deterrent to make a thief give up in their attempt to break in.
Ideal locations for Rationel SECURE
As broken windows attract unwelcome attention, thieves prefer windows which are hidden from view from neighbours or passers-by. Laminated glass is particularly useful in such locations as a thief has to work hard to break in.
Minimise the risk of injury
As well as reducing the risk of forced entry, laminated glass also improves window safety by ensuring broken shards of glass are held in place by the interlayer and cannot cause personal injury.
Sun protection
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.
- Sun SKN176:Approximately 64% transmittance*, 35% solar gain**
- Sun SKN165:Approximately 55% transmittance*, 31% solar gain**
- Sun SKN154:Approximately 47% transmittance*, 26% solar gain**
*= 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.
Triple glazed
– Best performance: 0.79 W/m2 K U-value
– 42 dB Rw sound reduction
Double glazed
– Best performance: 1.29 W/m2 K U-value
– 40 dB Rw sound reduction
