Place permanent wedging under jambs and any mullions to ensure that the weight of the window element is supported by the underlying brickwork/construction (A)
For windows with floating mullions, place wedging under jambs and floating mullions to ensure that the weight of the element is supported by the underlying brickwork/construction (A)
The sill must be horizontal and straight. It must not under any circumstances curve upwards or downwards. Place permanent wedging at the bottom of the jamb on the hinge side of the element (B). When securing, ensure that the point can absorb compressive forces.
Place permanent wedging at the top of the jambs on the hinge side of the element (C). When securing, ensure that the point can absorb tensile forces.
An alternative to this wedging is permanent wedging at the top of the jamb on the closing side of the element (D); when securing, this wedging must ensure that the point can absorb compressive forces.
For an element height of >1600 mm, wedging on both sides at the top of the frame is required.
For increased security and strength a permanent packer can be placed behind ironmongery fix points and locking points.
Jambs should be perfectly plumb and the head level, and can under no circumstances bow down.
During installation, the clearance, i.e. the space between the frame and sash, should be adjusted according to the function of the element.
The closing side must be adjusted to provide a tight seal when closed.
The tolerance on diagonal measurements is ±2 mm.
The frame head must not curve downwards. Permanent wedging on the frame head may only be used if the load from any window/door elements above does not subject the element to stress apart from on the jambs and mullions.