Sample Specification & Test Results

Below is a template for you to use in preparing a final, tile specification incorporating tile products marketed under the name Down to Earth®, a product line from Metropolitan Ceramics, manufactured by Ironrock Capital, Inc. This section includes installation materials not manufactured by Metropolitan Ceramics using the reference standard method of specifying.

A typical specification to assure the use of Down to Earth® unglazed textured quarry tile on your next job should be written as follows:

  • Ceramic tile shall be "Down to Earth unglazed tile as manufactured by Ironrock Capital, Canton, Ohio, 44711."
  • The body composition shall be of the finest shales and clays producing a uniform dense body with slip-resisting texture.
  • Color shall be:______________________
  • Sizes shall be:______________________
  • Patterns: as per drawing.
  • Grout: Compatible colors as approved by architect.
  • Test results shall be available upon request.
  • For best installation results we recommend the following be included in the specification:
  • Nominal 3/8" joint widths (1/4”widths may be used with some patterns)
  • Mix tile from several cartons for best shading during installation.
  • Use beating block to embed tile and align surfaces and edges.
  • Clean colored grout with tile sponge and cheesecloth or toweling for uniform grout color and most uniform grout level and texture. Some acid cleaners may damage grout joints. Test a small area first. Wet floor with clean water before applying any acid cleaner. Do not use any product containing Hydrofluoric acid since it will attack both grout and tile.
Click here to download complete Sample Specification
- Test Results -
By ANSI Standard Specification A 137.1 Metropolitan® Ceramics' unglazed tile is classified as quarry tile, however, the exceptional technical characteristics noted enables Metropolitan quarry tile to be used in virtually any application suitable for tile.
Abrasion Resistance ASTM C1243 Maximum Value of 275 mm³ D.T.E. tests at < 275 mm³
Absorption 5-hour boil ASTM C373 Maximum 5% D.T.E. tests at 3% maximum and qualities as vitreous
Breaking Strength ASTM C648 Average ≥ 275 lbf. D.T.E. tests at 800lbf. or better
Thickness ASTM C499 Max. range of .050” D.T.E. meets the standard.
Nominal Size ASTM C499 The facial dimension of each tile in the sample shall not vary more than ±2.00% from the nominal dimension. D.T.E. meets the standard
Freeze/Thaw ASTM C1026 Observations after 300 cycles.
No visible damage.
D.T.E meets the standard
Shear Bond Strength ASTM C482 50 P.S.I. or better D.T.E. exceeds the standard
DCOF Acu Test (wet) ANSI 137.1-2012 BOT 3000 No industry standard
threshold of 0.42
At time of manufacture, D.T.E. colors meet or exceed measure of 0.60 wet.
Warpage ASTM C485 Min. -1.5%  Max. 1.5%
along any edge.
Min -1.0% Max 1.0%
on either diagonal.
D.T.E. meets the standard
Wedging ASTM C502 Min. -1.0% Max. 1.0% D.T.E. meets the standard
Chemical Resistance ASTM C650 As Reported Class A Classification
Stain Resistance ASTM C1378 As Reported D.T.E meets the Standard
Scratch Hardness MOHS No Industry Standard 7