deteriorated beyond salvage, be sure to use a matching colour, but in a more durable material than original if available.

9.4 EXTERIOR WALLS The walls that enclose the building also provide much of the exterior appearance of the building. For the purpose of heritage conservation, this exterior appearance should be maintained. However, exterior walls are an assembly of elements and layers each intended for a different purpose. Examples are logs and chinking, stone and plaster, brick and wood paneling. Many of the traditional assemblies were designed to provide adequate structural integrity to hold themselves and other components in place, to provide security against the entry of uninvited people, to resist entry of wind, cold, rain, pests, and to provide a suitably finished interior appearance. When restoring exterior walls, ensure that the original intent ofthe original components is understood and repaired or protected adequately.

9.4.1 Brick

Brick is the most commonly used exterior wall material in the Sandwich Heritage Conservation District. During earlier periods, wood may have been used extensively to construct the frame and clad the exterior, but brick became more popular as a permanent, low maintenance material that provided additional security from fire, rot or damage from physical abuse. The brick that was available throughout the Sandwich Heritage Conservation District generally came from the Robinet Brickyard. In the hands of clever designers and skilled masons, bricks could be artistically combined in a variety of bonding patterns, textures, details and arches to give enormous variety to the exterior finished walls.

9.6 DOORS AND WINDOWS

Doors and windows offer both functional and visual contributions to the heritage character of buildings. In the Sandwich Heritage Conservation District, windows are particularly important features, as the repetition of specific shapes and materials creates continuity throughout the neighborhood. Recurring window shapes certainly include the rectangular double-hung window as well as a few others. Retaining the shape, size, and proportion of the original doors and windows is an important aspect of preserving the heritage character of the district.

• The preservation of original doors and windows is strongly encouraged wherever possible as the frames, glass, and decorative details have unique qualities and characteristics that are nearly impossible to replicate.

• Original wood-framed doors and windows in most cases can be restored or replaced with new wooden products to match if the original cannot be salvaged, but may require a custom-made product. Take particular care that exact visible details are replicated in such elements as the panel molding and width and layout of the muntin bars between the panes of glass.

• The replacement of original wood-framed windows by vinyl or aluminum-clad windows is discouraged. If this is the only reasonable option, the replacement windows should mimic the original windows with respect to style, size and