the retrofitting of the window 100 is performed when the sacrificial member 106 is replaced it will be appreciated however that the retrofitting of the window 100 can be performed at any time without departing from the spirit of the invention fig5 a illustrates a cross sectional view of a retrofitted window 100 wherein the retainer member 120 has replaced the gasket 110 described above in reference to fig2 and 3 the first leg 122 engages the frame 102 such that the sacrificial member 106 can be received into the space 132 defined by the second leg 124 and held therein securely adjacent the first side 108 of the glazing 104 as shown in fig5 a the sacrificial member 106 is retained in place adjacent the first side 108 of the glazing 104 by one embodiment of a first seal 146 mounted in the openings 134 defined by the second leg 124 in particular the first seal 146 engages the portion of the sacrificial member 106 and pushes it against the first side 108 of the glazing 104 furthermore the cross section of the first seal 146 defines a wedge whose tip engages the first side 108 of the glazing 104 thus retaining the glazing 104 securely adjacent the seal member 112 a portion of the wedge defined by the first seal 146 engages the edge of the sacrificial member 106 and.