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6 B: Design Standards for MATERIALS—ARCHITECTURAL METALS III-B-14. Retain and preserve architectural metals, metallic features,surfaces,as well as their form, pattern,detail,color and texture,through appropriate methods. III-B-15. Clean soft metals with chemical cleaning solutions using the least intrusive method. Test first to assure that they do not damage the metal or its finish. Do not clean soft metal surfaces with harsh abrasive methods. III-B-16. Repaint architectural metal surfaces,when needed,using paint that is appropriate for the use. (Staff can provide assistance as necessary.) III-13-17. Repair deteriorated or damaged architectural surfaces and features using traditional methods for reinforcing, splicing,or patching. III-B-18. Replace deteriorated or damaged architectural metal only if necessary. Match the original design, material, dimension,and detail. Replace only the deteriorated portion or detail rather than the entire feature whenever possible. Consider compatible substitute material only if using the original material is technically not feasible. III-B-19. Replace a missing architectural metal feature with a new feature based upon accurate documentation of the original or a new design compatible with the scale,size,material,and color of the building on the Local Landmark property. B: Design Standards for MATERIALS - ROOFING III-B-20. The original roof material should be preserved whenever possible. III-B-21. Roof trim(fascia,soffit etc.)should be maintained and preserved. Necessary repairs shall be made using the same materials and the same pattern as the original detail. S III-113-22. Roof material on new additions should be compatible with existing roofs in material,type, color,etc. C: Design Standards for SIZE AND SCALE S III-C-1. Maintain the size and scale of all contributing buildings,especially the main house. Obviously constructing an addition will increase the size of a building. The addition should not dwarf the older portions of the building or be so dominant that the building takes on an entirely different character. S III-C-2. The proposal for any new addition should incorporate one or more of the three common design tools:a connecting breezeway,an elevation setback,or a change of materials. III-C-3. Maintain the relationship between the contributing buildings. Contributing buildings described in the designation Research Report should not become overshadowed by new buildings,existing non-contributing buildings,or enlarged contributing buildings,which were originally small. C: Design Standards for PROPORTION AND RYTHYM q III-C-4. The combination of projecting and recessed features such as porches,doors and windows creates a sense of rhythm that should be maintained. 5 III-C-5. New additions should maintain the proportion and rhythm of the existing building. III-C-6. Front porches should be preserved as outdoor spaces. Requests to enclose porches in screen may be approved; requests to completely enclose porches with solid walls will likely be denied. III-C-7. Porch posts and decorative trim should be maintained and preserved. Porch supports should not be replaced with metal or synthetic posts. Porch trim should not be removed, hidden,or simplified under synthetic siding. III-C-8. If the porch on a designated property has to be replaced,the original porch should be reproduced as closely as possible. If the removed porch is not original to the house,the applicant shall undertake sufficient research to determine an appropriate porch design based on the age of the house, its style and detailing. New porches and related trim work should never attempt to predate the house or to be overly elaborate. C: Design Standards for WINDOWS AND DOORS III-C-9. The HPC encourages the use of storm windows to protect historic windows from deterioration. S III-C-10. Existing windows and doors should be maintained and preserved. III-C-11. When windows must be replaced, new units should be the same size,type,design,and material as the original windows. III-C-12. Windows and doors should never be removed,or"covered over"without replacement. Windows or doors that are not used can be enclosed using a traditional method such as louvered blinds to create a"false"door or window without disrupting the balance. III-C-13. The HPC discourages the use of replacement aluminum or vinyl windows on contributing buildings constructed with wood windows. S III-C-14. When new windows are used for an addition or detached new construction project, units should have panes with individual wood muntins(true-divided lights). Windows with"snap-in"muntin grids are inappropriate for historic buildings. The HPC will discourage their use unless no other cost-effective alternative is available. The HPC will consider new technological advances on a case-by-case basis.