VEKA Installation maintenance care guide VEKA Installation maintenance care guide | Page 8

A minimum of 2 fixings per jamb must be achieved. The use of polyurethane foam is permitted where it is impractical to achieve
mechanical fixing in the normal way but foam fixing is not acceptable as a sole means of fixing a frame.
Installation packers should be used adjacent to fixing positions to prevent outer frame distortion during installation. They should
be resistant to compression, rot and corrosion. Over tightening of fixing should be avoided. When enhanced security is required,
additional packers might be necessary adjacent to hinge and locking points.
A - Through frame
B - Long fixing
If it is necessary to fix through the bottom member of the outer frame, where water can collect, adequate sealing over screw
heads is recommended. Where possible, fixing brackets should be used for this application.
C - Short fixing
6.2 New Frame Preparation 6.2.1 Fixing Details
When preparing the new frame, the following points should
be followed: 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.
• I  f fixing brackets are to be used, these should be firmly
attached to the outer frame.
• I  f 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.
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.
When installing PVC-U frames, care must be taken to make sure that the window or doors are fitted square and plumb.
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
The following details provide indicative section details of the positioning of the frames within the reveal.
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
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Handling, Installation, Maintenance and Care Guide – V2 – 09/14
Flush reveal with joint width less than 6.0mm,
frame bridging the DPM.
Flush reveal with joint width from 6.0mm
to 15.0mm, frame bridging the DPM.
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