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I <Heart>Brownstones: Not Just a Pretty Faade Friday, March - PowerPoint PPT Presentation

Feb 18, 2024 •441 likes •1.06k views

I <Heart>Brownstones: Not Just a Pretty Faade Friday, March 3, 2017 Generously hosted by Michael Devonshire Architectural Conservator ______________________ Partner and Director of Conservation Jan Hird Pokorny Associates, Inc.

  1. I <Heart>Brownstones: Not Just a Pretty Façade Friday, March 3, 2017 Generously hosted by

  2. Michael Devonshire Architectural Conservator ______________________ Partner and Director of Conservation Jan Hird Pokorny Associates, Inc. jhpokorny.com

  3. Brownstone

  12. Marble, Granite Slate, Gneiss Formation Cycle Sandstone, Limestone

  17. Why it’s “brown”

  34. Scabbled Margined Rock faced Combed Hammered Chiseled Punched

  36. Inadequate choice of stone Harmful extraction Careless shipment Inappropriate storage (cure) Bad workmanship Poor placement Acid rain Dry deposition Salt crystalization Freezing water Hygric swelling Biological attack Thermal effects Mechanical damage Inappropriate treatments

  45. • Bacteria • Algae • Fungi • Lichens • Mosses • Higher Plants • Animals

  57. • Test for salts • Determine composition of material (chem/micro) • Test soil for water level, drainage capacity • Assess moisture level, porosity of material • Monitor cracks, efflorescence • Determine construction details • Perform material analysis (ex: infrared thermograph)

  60. ~END~ Thank you!

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