A - Through frame B - Long fixing C - Short fixing
6.2 New Frame Preparation
When preparing the new frame , the following points should be followed :
• If fixing brackets are to be used , these should be firmly attached to the outer frame .
• If you are to screw through the main outer frame into the structure , then the glass in the appropriate fixed light must be removed . If the window is too heavy for convenient handling , the glass units may also have to be removed .
Choosing one of the longest beads first , a paint scrapper is pushed into the bead / frame joint at approximately the centre point . Apply force to lift the bead up and out , starting at the end of the next bead , the remainder can now easily be removed . Make a note of the positions of each bead to ensure correct positioning later .
6.2.1 Fixing Details
Frames can be fixed by any of the following methods . A minimum of 5mm clearance is required per side , to allow for packers at the fixing points , this will allow any movement in the structure etc .
Prior to installation of the frames the damp proof membrane must be checked to ensure it is undamaged and still effective , any making good of the aperture should also be done including prevention of any cavity cold bridging .
A low modulus silicone must be used as well as backing rods as and when required . Exterior fixing lugs should be secured by “ one-way ” or other suitable screws . Expanding foam can only be used as an aid to mechanical fixings , and preventions must be put in place to stop any bowing of frames while being used .
Fixings should be at least as corrosion-resistant as BS EN 1670:1998 Grade 3 and should penetrate the substrate a minimum distance of 50mm .
Short Fixing Bracket
Long Fixing Bracket ( available in various sizes )
Through Frame Nylon Anchor
Through Frame Fixing Bolt
Long Fixing Bracket ( available in various sizes )
Through Frame Star Fix Screw
6mm Threaded Bar
8 Handling , Installation , Maintenance and Care Guide – V2 – 09 / 14