Manual of Purpose-Made Woodworking Joinery

54 Making traditional and modern windows

redwood, but preferably of oak or similar quality

hardwood;

7. Ventilation/weather bead, 44 × 16mm par (if used,
   replaces sill staff- bead);


8. Back lining or backing, 120 × 6mm plywood (tra-
   ditionally of sawn softwood);


9. Parting bead, 21 × 9 or10mm par (traditionally ⅜
   inch thick);


10. Wagtail, mid- feather or parting slip, a 50 × 6mm
    par length of hardwood or plywood, that hangs
    securely but loosely from a slot in the pulley- stile
    head, to keep the boxed sash weights from clash-
    ing;


11. Sash stiles and top rails, 44 × 34mm par (44 × 44
    par for thicker sashes);


12. Bottom sash rails, 70 × 34mm par (or 94 × 44mm
    par for thicker sashes);


13. Meeting rails, 44 × 28mm par (or 54 × 32mm par
    for thicker sashes);


14. Glazing bars, 22 × 34mm par (or 22 × 44mm par
    for thicker sashes);


15. Staff- , Stop- , or guard- bead, 20 × 16mm par (tra-
    ditionally ⅝ inch thick);


16. Glue blocks, cut diagonally ex 45 × 45mm par;


17. Sash pulley wheels (of various metals, sizes and
    quality);


18. Sash weights (ordered in pairs, by the weight of
    each glazed sash ÷ 2);


19. Pockets (formed in pulley stiles to enable access
    to the boxed weights);


20. Joggles are extended and shaped sash- stile horns
    projecting past the meeting rails that enable the
    meeting- rail joints to be mortised and tenoned,
    instead of being dovetailed. The latter was origi-
    nally done on good- class work.
    Of course, it should be mentioned that if a boxframe
    and sashes are being renewed with a like- for- like
    replacement, the sizes and style of the original should
    be followed.

the parting- bead groove, unless grooved for a

draught bead;

3. Draught bead, 21 × 9 or 10mm par (similar to a
   parting bead, but usually without the rounded
   front- edge;


4. Inner linings (including the inner- lining head),
   80 × 20mm par;


5. Outer linings (including the outer- lining head),
   96 × 20mm par;


6. Sill, 120 × 70mm par (or larger), of good quality

18

8

18

10

5

4

1

9

11

15

Figure 4.1 (e) Horizontal section D- D showing (1) pulley
stile; (4) inner lining; (5) outer lining; (8) back lining; (9)
parting bead; (10) wagtail; (11) sash stile of top sash
(with stopped- groove for sash cord); (15) staff bead; and
(18) high and low sash- weights. Note that the bottom
sash (as seen on the top of its meeting rail, between the
parting- and staff- bead) shows the end- grain detail of a
dovetailed joint instead of the appearance of a more
common joggle; this is explained further on in this chapter.

18

10

4

19

1

5

9

11

15 8

Figure 4.1 (f) Horizontal section E- E showing (1) pulley
stile; (4) inner lining; (5) outer lining; (8) back lining; (9)
parting bead; (10) wagtail; (11) sash stile of bottom sash
(note that the stopped sash- cord groove does not run
down this far); (15) staff bead; (18) sash- weight to the top
sash; and (19) the access pocket – note that the technique
for forming this, is detailed further on in this chapter.

14

Figure 4.1 (g) Horizontal section F- F showing (14) top

sash glazing- bar; note the adjacent wedged- end of the

mortise- and- tenon joint to the glazing bar of the sash

below the meeting rails.