· new tile or slate shingles that replicate the original (preferred); or

· architectural shingles in a color similar to the original material

Mansard roofs: Mansard roofs are a major design element of a house and should be treated with particular care. Since the extent of the roof is small, in most cases replacement with slate shingles which replicate the original is not prohibitive. Shingles should duplicate the shape and color of the original; painted designs are not generally appropriate, unless the original roof was painted.

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Roof shapes of historic buildings should be respected, and not altered by changing their slope or adding dormers or other roof elements. No new firewalls may be constructed that interrupt the roof. New skylights, metal chimneys and vents must be located on non-visible roof slopes.

Dormers original to the building must be retained and repaired, and may not be altered in size. Dormers that have been removed in the past need not be reconstructed unless desired; new dormers may not be added to visible facades unless there is clear evidence of their original presence.

On a flat roof, parapet walls should be returned to their original appearance: either brick capping or coping tiles. Cement parging or metal wrapping of parapet walls is not acceptable.

Gutters and downspouts must be placed as inconspicuously as possible, and in their original locations, if known. They must be color-clad or painted, and of appropriate dimensions.

Brick inset gutters are often a maintenance problem, and may be altered as shown below,. providing that the exterior appearance does not change:

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