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SECTION 07641
WERZALIT COMPOSITE SIDING
PART 1 GENERAL
1.1 GENERAL REQUIREMENTS
A. Drawings and general provisions of Contract, including General and Supplementary Conditions and and all Sections within Division 1 - General Requirements, apply to the work of this section.
1.2 SUMMARY
A. The Work to be performed under this Section shall include furnishing all labor, materials, equipment and appliances required to do the composite siding and metal trim work in accordance with the intent of the Contract Documents. The Work of this Section shall include, but be limited to, the following:
  1. Composite siding.
  2. Pre-finished extruded aluminum moldings and trim required for the proper installation of the cladding
  3. Bed caulking required for the proper installation of moldings
  4. All pre-finished brake metal and extruded aluminum moldings and trim. Include brake metal pieces other than the standard products of the siding supplier.
1.3 RELATED WORK
A. Examine Contract Documents for requirements that affect work of this Section. Other Specification Sections that directly relate to work of this Section include, but are not limited to:
  1. Section 06100, ROUGH CARPENTRY.
  2. Section 06200, FINISH CARPENTRY.
  3. Section 07600, FLASHING AND SHEET METAL.
  4. Section 07900, JOINT SEALANTS.
1.4 QUALITY ASSURANCE
A. Siding Manufacturer: Firm with manufacturing and delivery capacity required for project. Manufacturer shall have successfully completed at least 5 projects of the type, scope, and quality required with in the past five years.
B. Siding Installer: Firm with no less than three years successful experience in installation of systems similar to those required by this project and acceptable to the manufacturer of the system.
C. Mock up: Install a siding sample building end section mocking at the project site as selected and approved by Architect, including all removals, substrate preparation and installation of siding and components of the system specified. The Architect approved mock-up will be accepted as part of the finished installation. If the sample mock-up is rejected, corrective action shall be taken by the Contractor. Mock-up must be approved by the architect prior to the start of the system specified here-in.
D. Qualification of Installer: Workers shall be skilled in their designated tasks, and under the supervision of trained foremen.
E. Coordination: The contractor for the work of this section shall coordinate requirements and materials with other trades.
1.5 SUBMITTALS
A. Submit a proposed plan for the protection of the tenant/visitor and the control of dust, odors, noise, dirt, etc., prior to work for Architect's approval.
B. Product Data: Submit manufacturer's product specifications, details, drawings and installation instructions for each component required including complete independent and certified Test Lab Reports as required confirming performance meets or exceeds specified performance.
C. Samples: Submit 12" x 12" samples of portions of full size units, 12" long unit of linear components showing materials proposed for use, including finish, trim, molding, fastening and support system. Samples shall show full range of color, texture and visual appearance to be expected in completed work for Architect's selection.
D. Submit one sample of each type screws, clips, tubes of adhesive or other fastening devices to be provided as part of this section.
E. Shop Drawings: Submit shop drawings for all components including elevations and sections, for every location showing relationship of all items and including large scale details of each system component, anchorage and fastening device. Shop drawings shall show relationship to adjacent construction and shall indicate locations of related work. Where shop drawings deviate from drawing or specification requirements note such deviations on shop drawings and provide written explanation for deviation.
F. Submit certification and a 12" section of pressure treated wood items as required for job conditions.
G. Submit: Technical Data and a section of Air Infiltration (Vapor) Retarder with joint tape.
H. Caulking materials and technical data.
1.6 SAFETY PRECAUTIONS
A. Make special note of the fact that people (tenants) are living in the buildings which he will be working on and safety for them must be provided at all times.
B. Take all necessary protective action as required to protect occupants, visitors and Contractor's work force from various hazards that may occur as a result of the work.
1.7 ON-SITE INSPECTION
A. Prior to submitting a bid, the Bidder shall, with prior arrangement with the Authority, visit the site (see Advertisement for site date) and shall at that time, inspect all existing conditions to ascertain the exact scope and nature of the work that is required under this Contract, how it relates to existing work to remain and all job conditions and restrictions bearing on the work.
1.8 GUARANTEE AND WARRANTIES
A. Upon completion of the work, and prior to Substantial Completion of the Contract, submit to the Architect a written guarantee stating that all work performed under this SECTION 07461 will be free from defective materials and workmanship for a period of one year from the date of Substantial Completion as defined in the Specifications. Upon notification of any such defects within the guarantee period make all necessary repairs and replacements at no cost to the owner.
B. Furnish to the Architect, manufacturer's limited 20 year warranty for the siding and other manufacturers' warranties for various materials installed under this Section. However, such warranties shall be in addition to and not in lieu of all other liabilities which manufacturers, and Contractor may have by law or by other provisions of the Specifications.
PART 2 PRODUCTS
2.1 PRESSURE TREATED WOOD
A. Wood blocking, shims, furring, nailers, and for all other wood items as required or noted on the Drawings shall be pressure treated and be given a pressure preservative treatment with salt preservative to a retention of not less than .025 pounds per cubic foot of wood, in accordance with Fed. Spec. TT-W-571. After treatment, kiln-dry to a maximum moisture content of 19%. A certification that pressure treated wood complies with above must be submitted to the Architect.
B. Pressure treated wood members, where required, shall be Southern Yellow Pine, in the approved size, grade and type for wood furring nailers, blocking, shims and other wood as necessary to properly complete the work of this Contract. Pressure treated furring for aluminum panels shall be 1" x 2" in length to suit job conditions.
2.2 SIDING PANEL MATERIALS
A. The siding panels, trim and accessories listed herein are that of Werzalit of America, Inc. which is used for establishing a standard of quality and type of material and shall not be construed as limiting competition. Equivalent products meeting the requirements specified herein will be considered for approval as an equal by the Architect, upon receipt of adequate supporting data and samples two weeks prior to bid date. Any siding not meeting these requirements or submitted for approval prior to bid will not be considered.
B. Panels shall be pre-drilled with slotted holes for concealed fasteners and be cut with overlapping end joints to allow for expansion and contraction.
C. Exterior panels shall be factory pre-finished tongue and groove LAP SIDING design equal to (material type) (style) by Werzalit of America, Inc.
  1. Core: Exterior siding cladding material shall be manufactured from a shredded blend of hardwoods and soft woods. The shredded wood particles shall be dried and then blended with liquid melamine resins representing 21-25% of total weight. Along with the resins fungicides shall be added and chemically bonded to the wood to provide permanent resistance to mold, fungus, dry rot and to prevent biological attacks. The wood and resin blend shall be die formed and bonded together with a melamine surface on each side of cladding material under 250 p.s.i. and 300oF. The core material shall withstand a minimum 2 hour test in boiling water without delamination.
  2. Surface Coating Finish: All siding panels shall receive a factory applied thermoset, cross linked acrylic finish with a minimum dry film thickness of two (2) mils. This finish shall be hard, durable and resistant to a 80 MEK rub. Color shall be selected by the Architect from manufacturer's standard of sixteen (16) colors or a custom color as required.
  3. Siding Panel Properties:
   
Property Test Method Performance (Average or Typical Values)
Density ASTM D 1037-87 45-60 lbs/cu. ft
Weight per Square foot Coverage 4 in. Americana ASTM D1037-87 2.25 lbs
Hardness ASTM D1037-87 2,067 lbs
Modulus of Rupture (MOR) ASTM D1037-87 6.700 lbs
Modulus of Elasticity (MOE) ASTM D1037-87 9.4 x 10. psi
Moisture Content ASTM D1037-87 9% - 11%
2 Hour Boil Test Test Manuf. Std. max. 15% swelling
Caliper Swell - 2 hrs, 20 degrees C ASTM D1037-87 0.3 - 0.6%
Caliper Swell - 24 hours, 20 degrees C ASTM D1037-87 4-5%
Coefficient of Linear Expansion ASTM D1037-87 0.11%
Internal Bond ASTM D1037-87 300 psi
Fungi Resistance -- Standard in all products
Surface Burning Prop. Standard Products ASTM 84 Flame Spread 45

Smoke Developed 375
Deviation with Color type -- Max. E diff. = 1.5
D. Provide factory pre-finished extruded aluminum trim, starter rails SR-5, except at head of all door/window openings use SR-3, corners, (inside ISC-1 and outside OSC-11) trim edge, end closure EC-1, and other required components to properly install siding panels.
E. Note: All fasteners for installing siding panels and related components shall be approved stainless steel wood frame sinker head screws in minimum 1-5/8" lengths. Screws for installing extruded corners, starter rails and related trim shall be stainless steel in type, size and lengths approved by the manufacturer. Nails or screw nails are not acceptable.
F. Provide siding manufacturer approved water resistant vinyl thermo-break ventilation spacers, 1/4" thick x 1" wide, in 9'-0" lengths.
G. Caulking as detailed or required for siding shall be equal to "Dyomonic" by Tremco, "Sonolastic NPI" by Sonneborn or "Vulkem 116" by Mameco conforming to TT-S-00230C. Colors will be selected by the Architect from the manufacturer's full range.
2.3 AIR INFILTRATION RETARDER
A. The Air Infiltration Retarder listed herein is that of (type) which is used for establishing a standard of quality and type of material and shall not be construed as limiting competition. Equivalent products meeting the requirements specified herein will be considered for approval as an equal by the Architect, upon receipt of adequate supporting data and samples.
B. Air Infiltration retarder shall conform to the following:
  1. Basis Weight (ASTM D-646): 2.4oz/yd2
  2. Thickness (TAPPI T-411): 16.5 lbs/1000ft2
  3. Bursting Strength (ASTM D-D774): 123 psi
  4. Tensile strength (ASTM D-1682-GRAB) : 90 lbs md
  5. Trapezoidal tear (FTMS 191 M-5136): 18 lbs md / 23 lbs xd
  6. Gurley Hill porosity (TAPPI T-460): 10-20 sec/100cc
  7. Moisture vapor transmission rate (ASTM E-96, procedure): 125 gm/m2\24
C. Provide an approved tape by the air infiltration retarder system for sealing joints and seams. In addition provide all other items necessary to properly install the air infiltration retarder system.
2.4 ADDITIONAL MATERIALS
A. Provide all additional materials and components necessary to properly install siding and trim systems in an approved, first class manner.
B. NOTE: The existing substrate is (type), any damage to the sheathing caused by the work of this Contract shall be repaired/replaced to the satisfaction of the Architect at the Contractor's expense.
C. Any existing equipment that is damaged by removal operations such as down spouts, conduit junction boxes, cables, antennae wiring, and other related components shall be replaced at the Contractor's expense, to match existing in size, quality, design and other functional criteria as approved by the Architec
D. Provide all non-corrosive screws and fasteners of the proper size, type, length, etc. for re-securing mechanical/electrical items, mounting junction boxes, and related components.
PART 3 EXECUTION
3.1 PROTECTION
A. Protect, keep clean, as required or directed by the Architect, all entryways, stairs and areas of existing buildings scheduled for modernization work or used in the process of traveling to the work areas.
B. Protect existing work to remain, with boxing barricades, temporary stairs and ramps, temporary partitions and all required protection for persons and equipment in and around the work during the construction period.
C. Temporary protection shall be provided for all portions of existing buildings where work is to be done or materials handled. Temporary protection shall be such that the interior of existing structure will, at all times, be protected from dirt and dust, inclement weather, and loss of interior heat. The Contractor will be held responsible for any damage to the existing structure or contents by reasons of such protection.
D. Provide a complete system of temporary watertight protective coverings wherever existing siding and panel systems are removed or disturbed and maintain in effect until all new systems have been completed and are weather tight.
3.2 DUST CONTROL
A. Wet down debris to prevent air pollution by dust rising from siding removal.
B. Empty tarpaulins on trucks carrying debris to prevent spreading dust or debris.
C. Clean up loose debris daily to prevent the wind from spreading debris.
3.3 REMOVAL OF EXISTING SIDING AND RELATED ITEMS
A. Disconnect/reconnect as required, remove and reinstall existing items such as down spouts, conduit, telephone wires, junction boxes, antennae wiring, brackets, exhaust vents, protective systems, cable systems and other related building service components that interfere with siding and aluminum cladpanel systems replacement operations. Only workers licensed and experienced in the various trades shall be employed to perform this work.
B. All of existing siding, including furring, blocking, plywood panels, including existing wood trims as noted on the drawings, and other related items shall be carefully and completely removed down to sheathing in an approved manner, so that existing sheathing and related components will be undamaged and left in suitable condition to receive the applications of new siding, trim and panel systems. In such isolated cases where damage to the sheathing and/or related components may occur, such damage shall be immediately repaired in a satisfactory manner subject to the approval of the Architect and at no expense to the Authority.
C. All debris resulting from the removal of existing siding, trim items, plywood panels, and other indicated work shall be immediately loaded into trucks, and immediately transported from the site to a disposal point approved by the Architect.
3.4 SIDING AND RELATED MATERIAL INSTALLATION
A. Generally the siding, extruded trim, corners, "J" beads, and related materials shall be installed in strict accordance with each manufacturer's printed instructions as indicated on the Drawings and specified here-in.
B. Siding shall be handled, cut, fitted and installed in strict accordance with manufacturer's printed directions with all required accessory pieces, end trim, etc. Accessories shall be factory pre-finished in colors as selected by the Architect. All lengths of installed siding shall not be less than 4'-0" long with vertical joints to be randomly staggere
C. Prior to commencing work, verify governing dimensions of the building; examine, clean and repair, if necessary, any unsatisfactory conditions or adjoining work on which siding work is any way dependent for its proper installation.
D. The field application of the siding and trim members shall be in accordance with the best trade practice, with all joint members true and plum
E. Condition wood materials and cladding to average prevailing humidity conditions in installation areas prior to installing.
F. Discard units of material which are chipped, unsound, warped, bowed, twisted, improperly treated, not adequately seasoned or too small to fabricate work with minimum of joints or optimum jointing arrangements, or which are of defective manufacture with respect to surfaces, sizes or pattern
G. Securely refasten with new non-corrosive fasteners, all loose sheathing, remaining wood trim, soffit and other related items to the satisfaction of the Architect.
H. Install air infiltration retarder under all siding securely to substrate, seal joints, seams and flashing areas, etc. with approved tape.
I. Install siding thermo-break ventilation spacers at each wall stud support to provide a flat surface for the new siding. Spacing should be no more than 24" O.C.
J. Properly install pressure treated wood framing, furring, blocking, nailers, shims and related wood items as indicated on the Drawings and required, securely to substrate with approved non-corrosive nails and fasteners so that the siding and aluminum clad panel systems will fit neatly, flat, level and be in conformance with manufacturers requirements and Architects approval. Furring shall be installed in the field at no more than 24" O.C.
K. Install extruded aluminum trim, corners, end closures, "J" beads, starter rails and other related molding/trim as detailed on the Drawings and required for proper siding and aluminum clad panel installation.
L. Install caulking and sealing, including bedding aluminum panels into continuous caulk bead, caulking around items penetrating siding and various points as detailed on the Drawings or required to provide complete weather tight construction, in accordance with manufacturer's instructions.
3.5 ADJUSTING AND TESTING
A. Inspect system components for proper operation and fit. Adjust, repair or replace components not conforming to requirements. Repair or replacement of an individual unit shall be as approved by the Architect.
B. Exercise every reasonable precaution to avoid damage to new, existing work or work of other trades and repair any damage so caused. All damaged work that cannot be repaired shall be removed and replaced to the satisfaction of the Architect at the Contractor's expense.
C. All debris, materials and equipment resulting from this work shall be removed from the property daily.
END OF SECTION
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