Historic Preservation Commission Minutes 2020 11 16

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Historic Preservation Commission Meeting Minutes 16 November 2020 Page 5 of 9 Klemme made a motion to continue the discussion on 601 Lincoln Avenue. Parris seconded. Motion passed unanimously by voice vote. 816 Lincoln Avenue: A request for an Alteration Certificate to allow a change in roof material and roof pitch at 816 Lincoln Avenue. • Applicant: Andy Johnson • Staff: Lisa Ritchie, Planner Ritchie described the history of the project, noting that the Historic Preservation Commission had seen the project and received updates throughout its progress. However, the owner had made changes to the roof that had not been approved. The original Alteration Certificate stated that part of the roof would be shingled, but it was now metal, and there was a reduction of the roof pitch on part of garage, as well. Ritchie stated that the focus of this hearing was the metal roof on the house, but noted that staff found that the change of roof pitch on the new detached garage did not result in an incompatible addition to the landmarked property and did not destroy the historic integrity of the property or its environment. Ritchie continued with the roof on the two additions, describing staff's findings, which included that the change of roof material from asphalt shingle to standing seam metal on the addition provided differentiation from the original structure and are compatible with the historic character of the structure. Additionally, the roof was minimally visible from the street view and standing seam should perform better over time. She noted that the applicant had suggested that the historic roof may have been metal due to the configuration of the original flashing that was uncovered during the renovation, but staff had not found any evidence that the roof in question had been metal or that there were any metal roofs in the city at the time. Ritchie shared that staff did not recommend approval of the metal roof on the porch and was recommending requiring the property owner to return this section of roof to shingles. Dunlap asked for clarification on differentiation versus historic compatibility and wondered if the original shingles had been wood. Ritchie clarified that she had meant the roof on the addition was differentiated. Ritchie agreed that wood shingles would have been more likely, though the original materials for the roof in question could not be determined. Ritchie added that the asphalt shingle was the modern replacement for historic wood shingles. Johnson stated that this project was unique for DAJ Design because the homeowner was also the general contractor for the project, meaning that DAJ was not as involved with the construction process. He recognized that it was not ideal to come to the Commission after something had been done. He described the three different sections of roof in question, noting that the pitch of the porch roof was different than what they had first thought. He explained the flashing of the roof and noted that the flashing was more consistent with something like a metal roof, but there was no way to know definitively without more evidence. Johnson stated that it was very hard to find a roofing contractor who would do an asphalt -shingled roof at that pitch or who would offer a warranty for it, largely because the Front Range was a high -wind area, and with a low -pitch roof the wind would lift the shingles up and cause leaking. Johnson explained 5