You can use Hardiebacker board around your fireplace. However, using fiber cement board like Hardieboard is acceptable in locations including the mantel and fireplace surround.

Similarly, Is cement board a1 fire rated?

A1 non-combustible, cellulose fibre cement board

With an A1 non-combustible classification Multipurpose offers the highest level of fire rated performance making it an excellent option for buildings over 18m.

Also, Does cement board need to be waterproofed? “A waterproof membrane or vapor retarder membrane must be specified to prevent moisture intrusion and protect adjacent building materials.” ~B412 Bathtub or shower with prefabricated receptor. Cement board or Fiber-cement board. Consult local building code for moisture barrier requirements.”


35 Related Questions and Answers Found 💬

 

Which is better durock or Hardibacker?

HardieBacker board is definitely the go-to choice when it comes to tiling and counter tops. The Durock board is abrasive and can damage certain surfaces—particularly porcelain, vinyl, and enamel–whereas HardieBacker does not contain any abrasive materials and is, therefore, the preferable board for underlaying.

Can you use cement board behind a wood stove?

Safe wood stove installations require a heat shield that will prevent heat from the wood stove from creating a fire hazard in the building materials that form the exterior wall. Hardi cement board is an inexpensive solution that will form the foundation of an effective heat shield for any application.

What do you line a fireplace with?

Fireplace chamber – lining

Another simple and easy way to complete the chamber is to line the inside with fire boards. These are made from vermiculite which, when treated, can withstand temperatures of over 1,000C.

Can Durock cement board be used outside?

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

What is the best fireproof material?

What Materials Are Fireproof?
  • Refractories. Refractories are hard, heat-resistant materials such as cement, bricks, precast shapes, ceramics and fire clay.
  • Fiberglass. Fiberglass is a combination, primarily, of glass and sand.
  • Mineral Wool and Glass Wool.

Does durock have a fire rating?

The exact fire rating of Durock is dependent on the other materials used during construction, but a panel 1/4 or 1/2 inch thick typically provides an additional hour of fire protection.

What is the best fire resistant material?

Fire-retardant materials used in buildings
  • Treated vegetable fiber (e.g., cotton, jute, kenaf, hemp, flax, etc..)
  • Fire-retardant treated wood.
  • Brick.
  • Concrete.
  • Cement render.
  • Intumescent paint.
  • Glass.
  • Magnesium oxide (MgO)

What is durock made of?

Specifications
Actual Thickness (Inches) 0.5
Weight (lbs.) 36
ASTM C1288 Compliant No
ANSI A118.9 Compliant No
Warranty Limited lifetime

What do you put behind a fireplace?

Air barrier material behind fireplaces must tolerate heat. Air barrier material can include thin sheet goods such as rigid insulation, sheet metal, or dry wall. These materials may be installed by insulators, framers, or subcontractors or vendors hired specifically to install the fireplace.

Does durock require vapor barrier?

I called USG,the maker of Durock cement board Next Gen, and they advised using no vapor barrier so that the wall cavity can breath and allow any moisture to evaporate. Their online instructions/diagrams show no use of a vapor barrier.

Is drywall considered a non combustible material?

The code defines combustible materials as “any material not defined as noncombustible.” Drywall is also considered a combustible material because of the paper facing.

Does durock require vapor barrier?

I called USG,the maker of Durock cement board Next Gen, and they advised using no vapor barrier so that the wall cavity can breath and allow any moisture to evaporate. Their online instructions/diagrams show no use of a vapor barrier.

Is cement board good for soundproofing?

Does durock absorb water?

Cement board doesn’t absorb water and doesn’t foster mold and mildew. Durock or Wonderboard (seriously) appear to be the most commonly available brands.

What side of durock goes down?

Durock Surface which side down. Does the rough side of the cement board go down on the subfloor or the smooth side. I can see possible benefits of the rough side up to give the tile more adhering power but again the smooth side might provide a more level surface.

What happens if cement board gets wet?

That word is waterproof. The specially treated gypsum products will not last forever if they are allowed to get wet. If you want a backer board for your ceramic tile that will not deteriorate when water gets through your grout, then you better look to the cement board products.

What is considered a non combustible wall?

While wall ‘coverings’ are frequently noncombustible — like tile, brick, stone, metal — the underlying structure often contains wood, paper faced drywall or insulation, and other materials that could catch fire if enough heat were to be transmitted through the ‘noncombustiblewall covering.

What do you put behind a wood stove?

Type X drywall is a common material used for wood stove installations. Type X is a gypsum-based drywall that is 5/8 inch thick and is installed on each side of a 2-inch by 4-inch wood stud, spaced 16 inches on center or spaced 24 inches on center.

What side of the durock faces 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.

What is durock made of?

The simplest way to cut cement backer board is to score the surface and snap the sheet along the scored line, similar to the way you’d cut drywall. In fact, you can use a drywall utility knife to score backer board, but a better option is a carbide-tipped scoring tool.

How much clearance do you need around a wood burning stove?

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.

Which side of durock goes against the wall?

Durock Surface which side down. Does the rough side of the cement board go down on the subfloor or the smooth side. I can see possible benefits of the rough side up to give the tile more adhering power but again the smooth side might provide a more level surface.

Is durock structural?

DUROCK cement board is not designed for use as a structural panel. mesh completely encompassing edges and back and front surfaces.

Is durock structural?

USG Durock® cement board is formed in a continuous process of aggregated portland cement slurry with polymer-coated, glass-fiber mesh completely encompassing edges, back and front surfaces.

Does durock absorb water?

Since it is impregnated with a waxy substrate, it repels water, but has just about the same strength as common drywall (Sheetrock). The difference between concrete backer-board and water-resistant gypsum board lies in the former’s strength.

Can you plaster durock?

DUROCK Cement Board—USG plaster bonder is applied to the joint area before joint treatment with SHEETROCK® joint (paper) tape and SHEETROCK® setting-type (DURABOND®) or lightweight setting-type (EASY SAND™) joint compound. When USG plaster bonder is used, it may have to be diluted with water.

Is wedi board fireproof?

The wedi panel building board is suitable for all plastering and tiling work. It can be put on almost any surface, is waterproof, heat insulating, light and stable and can be used in a variety of circumstances. Wedi building board has a blue core made from extruded polystyrene rigid foam, which is free from HCFCs.

Is Gypsum flammable?

It’s composed of gypsum pressed between two sheets of thick paper. Gypsum is a soft mineral that by itself is not flammable. Once the water dissipates, the gypsum begins to heat past the boiling point of water, and may begin to burn.

What is Durock cement board used for?

DUROCK Cement Board—USG plaster bonder is applied to the joint area before joint treatment with SHEETROCK® joint (paper) tape and SHEETROCK® setting-type (DURABOND®) or lightweight setting-type (EASY SAND™) joint compound. When USG plaster bonder is used, it may have to be diluted with water.

Is Hardie board waterproof?

Hardie Board is the best known brand of cement board siding, which is often called fiber cement. All fiber cement products are waterproof and designed to hold up in extremely strong rain, winds, hail and salt air. Hardie Board is also extremely fire resistant.

Can you paint cement board?

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.