A. Glass in out-swinging wood casement
B. Typical wood muntin. The glass is placed from the outside and held in place with putty. The curve acts to soften the corner and avoids the sharp, glaring contrast that would occur if light were to strike a square muntin.
C. At the edge the convex muntin curve is echoed with a concave molding framing the whole window. This is a typical classical molding, with two contrasting curves of unequal size separated by a rectangular fillet.
D. The joint of the sash and the fixed sill is sloped to drain rainwater, and is provided with two air pockets to prevent water from being pulled through the joint by capillary action.
E. Spline. This prevents water from seeping through the joint.
F. Stone sill. This very unclassical moulding, with a knife edge and a sharp shadow, almost disappears in elevation. It is functionally useless, since it is flat and does not project. Like all lutyens's curves, these are fragments rather than full quarter and half-circles.
Butler, The Lutyens Memorial, volume I, plate LXV
Replication from Ford, Edward R, The Details of modern Architecture
B. Typical wood muntin. The glass is placed from the outside and held in place with putty. The curve acts to soften the corner and avoids the sharp, glaring contrast that would occur if light were to strike a square muntin.
C. At the edge the convex muntin curve is echoed with a concave molding framing the whole window. This is a typical classical molding, with two contrasting curves of unequal size separated by a rectangular fillet.
D. The joint of the sash and the fixed sill is sloped to drain rainwater, and is provided with two air pockets to prevent water from being pulled through the joint by capillary action.
E. Spline. This prevents water from seeping through the joint.
F. Stone sill. This very unclassical moulding, with a knife edge and a sharp shadow, almost disappears in elevation. It is functionally useless, since it is flat and does not project. Like all lutyens's curves, these are fragments rather than full quarter and half-circles.
Butler, The Lutyens Memorial, volume I, plate LXV
Replication from Ford, Edward R, The Details of modern Architecture
