09721_en.doc

SECTION 09721

FABRIC WALL COVERING

PART 1 - GENERAL

This section covers the furnishing and installation of the wall vinyl covering in strict accordance with this specification and the applicable drawings. Application shall be done by authorized applicators only, which in joint venture with products manufacturer, shall guarantee the wall vinyl covering for a normal period against leakage caused by poor workmanship or defective material.

1.1

APPLICABLE PUBLICATIONS

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only:

Italian National Institute for the Unification of Standard (UNI) Publications

UNI 4817

(1992) Polymeric Materials Coated Fabrics. Test Methods. Definitions, Sampling and Requirements

UNI 4818

(1992-1993) Polymeric Materials Coated Fabrics. Test Methods.

1.2

SUBMITTALS

1.2.1 Samples

The following samples shall be submitted for approval a.

Vinyl fabric

One piece 300 x 300 mm b.

Textile fabric

One piece 300 x 300 mm

Showing pattern design, finish, quality of each type of vinyl fabric and plastic trimming.

1.3

DELIVERY AND STORAGE

Vinyl fabric shall be delivered in manufacturer's original unopened containers and rolls with intact and legible labels. Roll materials shall be handled so as to prevent damage to edge or ends, shall be protected against wetting and moisture absorption, and shall be stored on end on clean raised platforms in dry locations with adequate ventilation. Roll materials shall not be stored in any building under construction until concrete, masonry work, ceramic tile, terrazzo, and plaster are dry. Wet materials shall be marked and removed from the project site. Immediately before application, roll materials shall be stored for 24 hours in an area maintained at no lower temperature than 10oC.

PART 2 - PRODUCTS

2.1

MATERIALS

2.1.1 Vinyl-Faced Wall Covering

UNI 4817 and UNI 4818. Shall be medium duty, mildew resistant, with a minimum total weight of 620 grams per meter and a minimum coating weight of 527 grams per meter. A polyvinyl fluoride film shall be factory applied over the face of the wall covering. Samples of the vinyl fabric wall covering shall be submitted to the Contracting Officer’s Technical Representative for approval. Wall covering shall be flame retardant and self-extinguishing.

2.1.2 Textile Wall Covering

Textile wall covering shall be polypropylene, polyolefin, or woven glass fiber with fused acrylic or paper backing. Samples of the textile wall covering shall be submitted to the Contracting Officer’s Technical Representative for approval. Fabric shall be mildew resistant and shall have a stain resistant coating.

2.2 ADHESIVE

Shall be mildew resistant, non-staining to the wearing surface, and of the type recommended by the wall covering textile manufacturer.

PART 3 - EXECUTION

3.1

PREPARATION

Before preparing the surface, inspect the plaster finish to ensure it is perfectly even and dry to provide a stable bond of the fabric to the plaster. Eliminate any imperfections on the plastered surface that may eventually be visible on the applied fabric. Apply the base coat of adhesive following the instructions of the manufacturer for that type of plaster finish.

3.2

INSTALLATION

3.2.1 Application

Apply the vinyl fabric of the length and height previously prepared. Fabric shall be perfectly vertical and at a distance of at least 15 cm from any corner or edge. Apply evenly to avoid imperfections or bubbling of material. No patching or repair is allowed.

3.2.2 Finish

Make sure vertical connections between strips are well cut and perfectly even to provide a continuous and smooth surface.

3.2.3 Fabric Cleaning

Remove any extra adhesive on any edge or connections, using warm water or as recommended by the manufacturer.

3.3

CLEANING

At the end of the work remove any dirt or trash and leave each room in a clean condition.

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Section 09721

Section 09721