Making an upgraded exterior door 89Figure 5.13 (b) Section A- A through the 95 × 45mm
par finished top rail showing the outline of the 16mm
concealed mortise- and- tenon position and its related
size; the ex 60 × 38mm tongued- and- rebated aperture-
lining necessary to convert the stile’s panel- groove to an
acceptable- sized rebate for sealed- unit glazing; the 16mm
sealed unit bedded in butyl glazing compound; and the
inner, splayed glazing bead (beaded to match the bottom
panels) screwed – or cup- screwed for future replacement
of the sealed unit.
Figure 5.13 (c) Section B- B through the centrally broken
depth of the 195 × 45mm par finished middle rail,
grooved for the aperture- lining above and the purpose-
made panel below. The two concealed mortise- and- tenon
positions (with a middle haunch) must be visualized from
the incomplete broken- lines; the purpose- made panel con-
sists of ex 50 × 50mm cross- shaped, tongued, rebated
and twice- beaded framing, mitred and glued at its
corners, with 25mm Celotex rigid insulation sandwiched
between two 9mm- thick exterior grade plywood panels,
as illustrated. The panel, of course, is snugly fitted without
being glued. The sealed unit above is shown on setting
blocks.