Can a new or better material replace the existing material on my historic structure?
A. Replacement of structural elements with anything other than the original construction material is scrutinized on a case-by-case basis. If replacement of roofing material will negatively affect the character of the structure, i.e. replacing wood shake for glazed tile, SHPD’s concurrence will not be given for the project. New, modern building materials may have different qualities which, in extreme cases, may damage existing material or cause bleeding of chemical agents into surrounding, pre-existing materials, causing accelerated deterioration. Be careful of mismatched materials which may have a detrimental effect on your historic property. Check for compatiblility when placing new building materials adjacent to the old structural material. Check with the Secretary of the Interior’s Standards for Rehabilitation for guidance.
