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Repair will also generally include the replacement in kind - - or with a compatible substitute material - - of those extensively deteriorated or missing parts of features when there are surviving prototypes , such as porch balustrades or paving materials . Limited replacement in kind of extensively deteriorated or missing parts of features when there are surviving prototypes ( for example , brackets , dentils , steps , plaster , or portions of slate or tile roofing ) . Repairing also includes the limited replacement in kind - - or with compatible substitute material - - of extensively deteriorated or missing parts of features when there are surviving prototypes ( for example , brackets , dentils , steps , plaster , or portions of slate or tile roofing ) . Repairs will also generally include the limited replacement in kind - - or with compatible substitute material - - of those extensively deteriorated or missing parts of features when there are surviving prototypes such as cupola louvers , dentils , dormer roofing ; or slates , tiles , or wood shingles on a main roof . Repairs may also include the limited replacement in kind - - or with a compatible substitute material - - of those extensively deteriorated or missing parts of features when there are surviving prototypes such as porch balusters , column capitals or bases ; or porch cresting . The default installation has plenty of features but there are lots of plugins if you need more .