Frequently Asked Questions

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 Cement board OUTDOOR APPLICATION

It can be used outdoors as they are moisture resistant (not water-proof).

It doesn't promote the growth of mold or fungus. Insects don't eat this stuff.

it's protection again termites. It's salt-resistant but not well suited for areas with a consistent relative humidity of 93% or more.

Suitable for structural sheathing

It is quite strong and has good flexural and tensile strength, making it suitable as a structural sheathing. It also has high impact resistance, making it good for damage-prone applications, such as hurricane areas, or when used with a

simple surface coating in areas where the wall might get beat up.

Outdoor

1.   The boards will be installed on suitable metallic frames depending on whether the installation is on walls, linings walls, ceiling or ventilated façade.

2. We recommend using metallic profiles in compliance with the UNI EN standard with 10/10mm thickness.The galvanizing must be greater than or equal to 200 gram/m2 .

3. Arrange the frames one step no greater than 40cm.

4. The boards must be installed perpendicular to the metallic frame with the cut side exposed.The joints must be staggered as in any normal dry covering application.

5. Between one board and the next leave about 3-4 mm.

6. Keep the sheets off the ground 12 / 12.5mm with the help of a scrap of sheet (which should then be removed) to of prevent the possible lift of capillary moisture, salts or impurities of the support bases, and to allow the normal expansion of the materials.

7. Fixing boards with screw screwing from cut side with step 20cm (15cm for horizontal applications); a distance of about 15 mm is indicated from the edge in order to best take advantage of the boards contact with the large surface of the screw head.

8. Install an expansion joint every 12 linear meter, both in horizontal and vertical direction;

9.   Where is expected a glued surface coating*, at this point the wall is ready to host it.

10. If instead is expected a traditional finishing, spread a layer of cement coating on the entire surface of the boards with a notched trowel steel, making sure to penetrate the coating inside the joints between boards.

11. Embed the mesh in the cement coat which has just been spread, taking care to hide it completely, working with the smooth side of the trowel steel. Mesh joints will be overlapped by 100mm, following the remarked line.

12. At this point the final thickness of coating must be 3mm.

13. Complete the surface with a finish plaster walls like acrylic plaster, acrylic-siloxane or siloxane.