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As they were developed, some historic roofs were failures from the beginning, dependent on innocent and overambitious use of substances. Research on a structure may reveal an inadequately designed or a highly combustible roof has been replaced in its history, and so recovery of a later roof material would have a valid precedent.
Ease and cost of upkeep can dictate that the substitution of a substance completely different in appearance from the original. The practical issues (wind, climate, and roofing pitch) ought to be weighed against the historical consideration of scale, texture, and colour. Sometimes the material's impact will likely probably be minimal. But on roofs with a high degree of visibility and patterning or feel, the substitution may seriously alter the architectural character of the building.
Any temporary covering ought to be applied with caution, although A very simple covering of plywood or roll roofing might offer adequate security. One needs to take care to not overload the roof construction, or to damage or destroy historic evidence or cloth that may be incorporated into a brand new roof at a later date.
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Precautions return to top contractor or The architect should warn the proprietor of any precautions to be taken against the particular hazards . Soldering of sheet metals, for example, could be a fire danger, either from the open fire or by overheating and unnoticed smoldering of the wooden substrate substances.
Consideration should begin with the placement of contemporary pipes on the inside of the building, otherwise a string of vent stacks may pierce the roof membrane at different spots creating maintenance problems as well as aesthetic ones. Vents which, then, require layout will be required by air handling units.
Whenever gutters and downspouts are required which were not on the construction historically, the improvements must be made as unobtrusively as possible by painting them out using a color compatible with the wall or trimming. Return to top Special problems inherent in an historic roof's design could be controlled through regular maintenance.
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Though a new roof may be a thing of beauty, it will not be protective for long. At least the roof should be inspected against a checklist. All changes must water dripping from roof be recorded and reported. Guidelines should be established for any foot traffic which could possibly be needed for the maintenance of the roof.
For clay tilea, and someslate, asbestos ladder may be hung over the roof's ridge, or boards may be spanned across the roof surface. Such items should be designed and kept in a storage space. If exterior work requires hanging scaffolding, apply caution to assure that the anchors do not penetrate, break, or wear the roof surface, gutters, or flashing.
Items must be assessed at times. For instance, gutters tend to collect leaves and debris during the spring and autumn and after heavy rain. Hidden gutter screening over the entire duration of the gutter and in downspouts may help keep them tidy. The surface material will require checking following a storm.
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Damage from water or ice is likely to a roof that has flashing onto the exterior and is well ventilated and insulated on the inside. Instructions to the maintenance of the roof materials should be available in the contractor or architect. Summary and References return to top roof replacement estimate The components for maintaining and fixing a historic roof are: Recognizing the building's nature and being perceptible to it.
Consideration of this historic craftsmanship and detailing and implementing these in the renewal where observable. Supervision of those roofers or maintenance staff detailing of this project and to assure preservation of historical fabric and appropriate understanding of the extent. Consideration of materials. Maintenance plan to ensure that the staff knows how to take care of the roof and of this trouble spots to protect.
Acknowledgements This Preservation Brief was written by Sarah M Sweetser, Technical Preservation Services Division, Architectural Historian. Much of the technical advice was based upon an unpublished report prepared under contract because of this office by John G. and Diana S. water leaking through roof Waite.
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This publication has been prepared pursuant to the National Historic Preservation Act of 1966, as amended, which directs the Secretary of the Interior to develop and make available information concerning historic properties.
Architectural Graphic Standards. A History of the Construction Crafts. London: Oxford University Press, 1925. Vol.