USG Durock® cement board is intended for use with tile, thin brick and exterior stucco coatings only.


Is it OK for cement board to get wet? You should absolutely use a tile backer board that is also unaffected by water. Properly mixed concrete or cement board is not harmed by the presence of water. That is why concrete is an excellent outdoor building material. Years ago the tile setters of old mixed and placed wet concrete on the walls of old houses.

can cement backer board be used outside?

It can be used on the exterior of buildings as a base for exterior plaster (stucco) systems and sometimes as the finish system itself. Cement board adds impact resistance and strength to the wall surface as compared to water resistant gypsum boards.

Do you need a vapor barrier behind cement board? You still need a vapor barrier with cement board, although in this case the barrier can go behind the board. Cement board is heavy enough and breathable enough to take the moisture without a problem.

which side of durock goes out?

Cement board has a smooth side and a rough side. Face the rough side out if you will be using thin-set mortar adhesive to install the tile but the smooth side out if you will be using latex mastic.

Can HardieBacker 500 be used outside? 4.2. HardieBacker®500 Cement Board may also be used in exterior wall applications as a backer board for exterior tile, slate, marble, stone, thin brick and manufactured stone in any type of construction under the 2009 IBC, and in buildings constructed under the 2009 IRC.

what is cement board exterior?

One of the major advantages that you will get by using cement board for an exterior wall is durability. Cement board is made out of Portland cement and small pieces of glass. For example, you can choose to paint the cement board or apply a stucco finish to it.

Where is durock used? USG Durock® cement board is preferred by many applicators as a base for directly applied finishes, tile, stone and thin brick used in building exteriors. Corrosion-resistant; 8-gauge; wafer heads with countersinking ribs to prevent strip-out; self-drilling points.

Is Durock cement board waterproof?

” Well, here's what some manufacturers have to say about waterproofing: PermaBase (National Gypsum): PermaBase PLus is not a water barrier. Durock (USG): “If waterproofing is desired, use USG Durock™ Tile Membrane or USG Durock™ Brand Waterproofing Membrane.”

How much does a sheet of durock weight? Specifications Actual Thickness (Inches) 0.5 Weight (lbs.) 36 ASTM C1288 Compliant No ANSI A118.9 Compliant No Warranty Limited lifetime

Should you waterproof cement board?

Concrete backer-board, once commonly referred to in the field by the brand name Wonderboard(r), is a cement product designed as a sheathing material for walls and floors. Most concrete backer-boards on the market today are not water-resistant, but all are waterproof.

What do you use cement board for?

Cement backer board is mainly used as a sub-surface for tiling. Cement backer board is often used as a tile base on plywood or OSB subfloor. Cement backer board on concrete as a subfloor or underlayment is usually not recommended or needed. In most cases, you can apply tile directly to the concrete.

What type of screws do you use for cement board?

Cement board attached to plywood or similar underlayment will hold with only 1 1/4-inch screws; for thick or heavy metal fixtures, use 1 5/8-inch screws. In general, 1 1/2-inch galvanized nails will hold the board firmly in place.

Can I use Hardiflex for exterior wall?

One budget-friendly trick of contractors is buying ficem boards with a wood grain finish (you can get this type from James Hardie) and using them as “wood planks” for the house gates. Another great use of ficem boards (especially the textured ones) is to use these as exterior wall cladding for house facades.

Is cement board fire rated?

Yes, HardieBacker® 1/4" Cement Board is deemed noncombustible when tested to ASTM E 136 and can be used in conjunction with other noncombustible materials around a fireplace. This does not mean that clearances to combustible building materials can be reduced by using HardieBacker 1/4".

Is cement board stronger than plywood?

Cement backerboard is more stable than plywood in high humidity and other wet environments. It won't swell and buckle the way that plywood does, so it's safe to use in mudrooms and bathrooms where things like spills and puddles are normal, as well as in areas with high levels of moisture in the air.

Is cement board good for soundproofing?

Answer: Gypsum board, because the gypsum board density is low, so the sound insulation is better. However, the cement board is also possible sound insulation is very good, such as foam cement, its density is smaller than the plaster, sound insulation is also better.

Does cement board contain asbestos?

The asbestos fibres in asbestos cement are found within the cement itself; the asbestos cement will have a cement-rich surface, and thus the fibres are contained. However, significant – and possibly dangerous – amounts of fibres can be released if the cement is subject to any abrasive cleaning or working.