Single Flange Rigid Frame Formers

Need some help?

If you need to speak to someone about this product, our sales and technical support advisors are here to help.

Get in touch >


We have partnered with the BIMstore to help provide you with the highest standard of BIM content around.

Browse BIM Information >

Product Code G282

Made to order
0.030 W/mK
75 to 130mm
Ready Assembled or Flat Packed
Order Specific
Extrusion: uPVC Styrofoam: CFC free extruded polystyrene

Product Description & Key Features

The Manthorpe Rigid Frame Former can be used in place of dummy timber frames – and beat more traditional methods of window construction on all counts. Strong, extremely simple to install and available in a multitude of widths, the product has been designed to improve efficiency, speed up installation and save man hours. Use of the Rigid Frame Former eliminates the site clutter that arises from dummy timber frames, which are prone to damage when left lying around.
The product provides a framework for the masonry construction around the window aperture and remains in place as a base for the window frame. The Manthorpe Frame Former achieves the required thermal break at the reveal of the window and door openings when fixed to allow a 30mm overlap into the cavity. This applies to sills, doors and rebated reveals.
Ready Assembled or Flat Packed
Choose the option that suits you best – just one phone call to Manthorpe and we can supply either ready assembled frame formers or cut-to-length, palletised flat packs.
Easy to transport and easy to store on-site, the flat pack version has proven to be extremely popular in tests, reducing clutter (no more piles of frames) and leading to quicker, better organised ways of working. Assembly is easy and fast – just click to fit.
Rigidity Ensured
Quick-to-fit corner braces and horizontal battens, secured with self-tapping screws, ensure that rigidity is maintained. For larger doors and windows, where extreme rigidity is required, a diagonal brace is also provided. Braces and battens are re-usable.
Project Specific Take-Off Service
For larger projects we offer builders, architects and developers a project specific take off service. Simply let us have the information or drawings and we will calculate the size of the window openings and supply Manthorpe Rigid Frame Formers specific to that particular development, streamlining operations, saving more time and increasing efficiency even further.
As well as windows and doors Manthorpe also offers P, T and Q shaped frames. With these larger frames we recommend that they are transported flat pack for reasons of safe delivery.
  • Removes the need for dummy window formers
  • Allows the cavity closer to be tied into the masonry construction
  • Provides a thermal break to the cavity
  • Acts as an effective vertical DPC barrier
  • Standard and Rebated profiles available
  • Make to order either premade or flat packed
  • Variety of shape configurations available

Literature and Technical Info

Related Products and Solutions

Thermal Cavity Closers

Heat loss and condensation through un-insulated door and window reveals can ruin an otherwise warm and comfortable home. The Manthorpe range of cavity closers offers an economical solution to closing the cavity at window and door reveals while also solving cold bridging problems.