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Home My WebLink About2013-10-28 PACKET 07.2.Cottage J Grove h ere Pride ar',PTp5per1tY Meet TO: Planning Commission Members FROM: John McCool, Senior Planner DATE: October 23, 2013 RE: City Code Amendments — Architecture Proposal An amendment to the architecture section of the Zoning Ordinance is proposed. This amendment pertains to the class of building materials for nonresidential structures and exterior materials for additions to existing nonresidential buildings. Discussion Exterior Material Classes Exterior design standards (Title 11, Chapter 6, Section 13(c )(4)) divides exterior building mate- rials into four classes. These building material classes are: Class 1 Class 2 • Copper panels • Architecturally textured precast concrete panels • Fired clay face brick • Concrete brick • Natural stone • Masonry stucco • Transparent glass • Specialty concrete block such as textured, burnished • Other comparable or superior materials block or rock faced block • Synthetic or cultured stone • Tile (masonry, stone or clay) Class 3 Class 4 • Cemetious board • Ceramic • Exterior finish insulation system (EFIS), synthetic • Glass block stucco or similar material . Industrial grade concrete precast panels • Opaque or mirror window panels • Smooth concrete block • Ornamental metal a Smooth scored concrete block • Steel or aluminum siding • Wood Synthetic and Masonry Stucco Synthetic stucco has the look of masonry stucco, but generally not the same qualities. Often called Exterior Insulation and Finish System (EFTS), synthetic stucco had problems in its early years. While there have been improvements to this material, the bad reputation has stuck. EIFS Planning Commission Proposed Architecture Ordinance Amendment October 23, 2013 Page 2 of 4 usually consists of an insulating styrofoam panel affixed to wall sheathing, then covered kith reinforcing mesh, followed by a base coat and a finish coat. The base and finish coats are usually about 3/8 -inch thick and contain an acrylic resin which is water soluble in its liquid form when ap- plied, but once dried, become waterproof. The layers are usually secured to plywood, OSB board, gypsum board, or other substrate using an adhesive. A masonry (cement) based product is used around the world because of its natural durability and versatility. This stucco can least for over 50 years with regular maintenance. Easy to apply, many people choose this type of stucco because of the do- it- yourself factor. Masonry stucco is com- posed of cement, water, and inert materials such as sand and lime and is usually applied over masonry or other relatively firm base. A galvanized wire mesh is attached to the exterior of the structure and the mortar mixture is applied over it. The "hardcoat" material is porous and will ab- sorb moisture; however, it breathes and easily dries without damage to the structure. Masonry stucco is heavy and feels solid if tapped. It is a much harder material than EIFS and will withstand a minor blow. Overall, synthetic stucco can be as durable as masonry stucco. The looks between the two products are deceiving. Synthetic stucco does not have the same feel or protective qualities as masonry stucco. Examples between masonry stucco (Class 2) and synthetic stucco are shown below. The proposed amendment adds synthetic stucco as a Class 3 material. Masonry stucco remains a Class 2 material. Synthetic or Culture Stone The draft amendment proposes to allow synthetic or cultural stone as Class 1 material. Currently, the ordinance classifies this material as a Class 2 material. This type of product has significantly improved over the years. It is maintenance -free and requires an occasional light washing to remove dust and dirt. There is no painting, coating, or sealing re- quired and it comes in a wide variety of textures, shapes, sizes, and colors. Planning Commission Proposed Architecture Ordinance Amendment October 23, 2013 Page 3 of 4 Images of synthetic /cultural stone are shown below. Examples of Synthetic and Cultured Stone Products Opaque and Mirror Windows The draft amendment proposes to allow opaque or mirror windows as a Class 1 material. Cur- rently, the ordinance classifies this material as a Class 3 material. Transparent glass is a Class 1 material. Opaque or mirror windows offer an architectural alternative that is equal to transparent glass. For this reason, the ordinance amendment proposes to move opaque and mirror windows from Class 3 to Class 1. Examples of opaque and mirror windows are shown below. Exterior Building Materials City ordinance currently allows a building addition to use the same exterior building materials as the existing building only if the proposed addition is less than 50 percent of the existing building's floor area. Several variance applications were filed with the City in past years to allow expansion of certain industrial buildings that are located amongst other existing buildings that did not have Class 1 exterior materials. These variance applications were granted by the City based on the findings that the proposed building additions were internal to a large manufacturing campus and the location of the buildings were fairly far away from the property's boundary lines abutting public right -of -way. Staff proposes an amendment to the architecture regulations to allow large manufacturing facili- ties the opportunity to construct additions greater than the 50 percent floor area limitation to use the same exterior materials. This proposed amendment requires the compliance of the following criteria: Planning Commission Proposed Architecture Ordinance Amendment October 23, 2013 Page 4 of 4 1. The proposed building addition is a minimum of 600 feet from public right -of -way, public prop- erty, and public waterways; and 2. The property that the building addition is located on is a minimum of 100 acres. Adjoining land in the same ownership and zoning classification may be used in calculating the minimum acreage requirement. Recommendation At the October 28 meeting, the Planning Commission will be asked to discuss and consider changes to the architecture sections of the City Code. If changes are directed, the draft ordinance amend- ment will be modified and again presented to the Planning Commission at a future meeting for public hearing. For your consideration and discussion, please review the proposed ordinance amendment enclosed with this memorandum. 1 2 ORDINANCE NO. XXX 3 AN ORDINANCE AMENDING TITLE 11, CHAPTER 6, SECTION 13, ARCHITECTURE OF 4 THE CITY OF COTTAGE GROVE, MINNESOTA CITY CODE BY ALLOWING BUILDING 5 EXPANSIONS GREATER THAN 51 PERCENT OF THE EXISTING BUILDING'S FLOOR 6 AREA TO USE THE SAME EXTERIOR MATERIALS AS THE EXISTING BUILDING 7 8 The City Council of the City of Cottage Grove, Washington County; Minnesota, does hereby 9 ordain as follows: 10 11 12 13 SECTION 1. AMENDING Title 11, Chapter 6, Section 1 shall read as follows: hereby amended and 14 15 16 17 Title 11, Chapter 6, Section 13 ( C)(4)(a) 4. Exterior Design Standards: Exterior surface following: a. Classes Of Materials: For the purpose of this class 1, class 2, class 3 and cla c ",tegor, Class 1: Copperpan Fired clay p Natural ston E materials `4 of buildings are subject:to the section, materials are divided into as `d s.gribed below: precast concrete panels rick Masonry`stucco Specialty concrete block such as textured, burnished block or rock faced block Synthetic or c stone Tile (masonry, stone or clay) Class 3: Cemetious board Page 1 Exterior finish insulation system (EFIS) synthetic stucco or similar material Opaque or miFFeF wiRdew panels Ornamental metal Class 4: Ceramic Glass block Industrial grade concrete precast panels Smooth concrete block Smooth scored concrete block. Steel or aluminum siding , X Wood 18 19 20 SECTION 2. AMENDING Title 11, Chapter 6, Section 13 (,C)(4)(b)(6); is hereby amended 21 and shall read as follows: 22 23 Title 11, Chapter 6, Section 13 ( C)(4)(b) �` 4 24 ti 25 (6) Expansions of less than fifty percent (50 §I otf a floor area of the existing building may 26 use the same materials as the existing structure Expansions greater than fifty -one percent 27 of the existing building's floor area may use t exterior materials as the existing 28 building if the followin- 'criteria are all bb , , t h 29 The building addition is a minimum of feet from public right -of -way, public property 30 and publicwaterways:'and 31 - ` The property that the building addition is located on is a minimum of 100 acres. 32 Adjoining land in the same ownership and zoning classification may be used in 33 calculating the minimum acreage reauirement. 34 35 ��: �. 36 SECTION 3. SUMIVI' R1(> UBLICATION. Pursuant to Minnesota Statutes Section 412.191, 37 in the case of a lengthy ordinance, a summary may be published. While a copy of the entire 38 ordinance is available without cost at the office of the City Clerk, the following summary is 39 approved by the City Council and shall be published in lieu of publishing the entire ordinance: 40 This ordinance amendment allows synthetic or cultural stone and opaque or mirror window 41 panels as a Class 1 material and building expansions that are greater than 51 percent of the 42 existing building's floor area may use the same exterior materials as the existing building if 43 the building addition is a minimum of 600 feet from public right -of -way, public property and 44 public waterways and the property that the building addition is located on is a minimum of Page 2 45 100 acres. Adjoining land in the same ownership and zoning classification may be used in 46 calculating the minimum acreage requirement. 47 48 SECTION 4. EFFECTIVE DATE. This ordinance shall be in full force and effect from and 49 after its passage and publication according to law. 50 51 Passed this day of 1 2013. 52 Attest: 53 54 55 Om 57 Caron M. Stransky, City Clerk Mayor Page 3