The G242 from Manthorpe is an excellent product for use with wooden windows and doors. The closers are lightweight and easy to install, coming in a range of sizes to suit all cavities and requiring no special tools for installation. All you'll need is a saw to cut the lengths to the desired size, an easy method that poses no risk of a loss in thermal efficiency. PVC flanges can be used to securely fix some products. These closers are suitable for use as lengths individually, directly fixed to door frames and windows, or preformed as frame for maximum versatility. This cavity closer can work as part of a complete detail incorporating wooden door/window plasterboard and frames to help ensure compliance with the requirements of the government’s regulations for building (Part B).Use with G245 and G246 Plastic Fixing Clips to securely mortar the closer to the brickwork. This method also allows lengths of shorter dimensions to join with each other, helping reduce wastage. The G242 Single Flange Cavity Closer can be installed in a rebated detail in instances where a windowframe is situated behind an outer leaf. This is a non-load-bearing closer and therefore shouldn’t replace traditionally used methods for window and doorframe masonry fixing. Manthorpe Cavity Closer Specification Length: 2.5mCavity Width: 50mmExtrusion Material: UPVCStyrofoam: CFC free Extruded PolystyrenePack Quantity: 6 Lengths