The following guidelines are used by the Commission in considering a Certificate of Appropriateness, and will be useful to anyone in Harwinton who is contemplating work which alters historic architectural features. The guidelines are divided into sections covering maintenance, repair, replacement and new construction. "Maintenance" and "Repairs" generally do not require a Certificate of Appropriateness, but are included to assist the homeowner in making decisions concerning options to be considered or avoided in the process of building or restoration. No intent is made to cover every situation or condition which may arise in the Historic Districts. Homeowners should refer to the following as reference material, and not as district standards.


Exterior walls and siding provide the building with an overall texture. The choice of materials and their relationship to each other help in defining the historic character of the building.

Wood clapboard is the most prevalent siding material within the Historic District. Other siding materials include wood shingle, vinyl and aluminum siding and brick.

Masonry is a very durable material and with proper care can last indefinitely. The major cause of deterioration is inappropriate cleaning and waterproofing, which leads to water damage. Air pollution can also lead to masonry decay. Maintenance for masonry walls and foundation includes proper drainage systems and, when necessary, cleaning of the exterior surface.

Wood Siding is also a very durable material when properly maintained. Routine painting and caulking are the best preservatives. Water, insects, fungi and vegetation growing too close to it's surface can all contribute to siding damage. Handcrafted detailing and finishing should be carefully preserved when maintenance and/or repairs take place.

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