Durock Installation Instructions

Use For Your DIY Project

By: - Home Improvement - June 9, 2011
durock installation instructions

Durock cement board is a water-durable, mold resistant panel used as substrate for a variety of interior and exterior applications.  Durock’s cement boards have been the industry standard for performance and reliability for the last 25 years.  The next generation of cement board from Durock offers improved performance.  It weighs 25% less than the original version and the installation of this cement board is up to 20% faster as well.   This is, in part, attributable to its lightweight structure, as it’s easier to score and doesn’t require as much effort to lift or hold in place while it’s being secured to a surface.

According to Durock installation instructions, this product is equally suitable for both steel and wood framing applications, spaced 16” o.c in new construction and remodeling.  Durock installation instructions outline its use for partitions, walls, floors, soffits, countertops, and ceilings in wet or dry areas.   Because of its superior mold resistance and the fact that it will not swell, soften, rot, warp, disintegrate or delaminate when exposed to water, this backer board is actually ideal for places that are regularly exposed to dampness, such as bathrooms and exterior areas.

Before beginning you’ll need to make sure that your project meets the requirements outlined for cement board installation:

  • Subfloor needs to be a minimum of 5/8” exterior-grade OSB or plywood.
  • Countertops of 5/16, ½, 5/8” thickness need a minimum ¾” exterior-grade plywood base and that base should be covered with 15lb. felt or 4-mil polyethylene attached with ¼” galvanized staples.
  • For walls and ceilings of ½” and 5/8” thickness only, the maxiumum stud spacing is 16” o.c (24” o.c. for cavity shaft wall assembly).  The maximum allowable deflection, based on stud proper ties only, is L/360.  Maximum fastener spacing is 8” o.c for wood and steel framing with 6” o.c for ceiling applications.

As with any project, before beginning your cement board installation, be sure you have everything you are going to need available on hand.  The following is a list of all of the things you may need for cement board installation.  Refer to Durock installation instructions for your specific project to see which of these items you will need:

  • Utility knife and straight edge: Durock panels should only be cut with a power saw if the saw is equipped with a dust collection device.
  • NIOSH/MSHA approved mask (never cut Durock panels without one of these, whether using a utility knife or saw)
  • Eye protection: Safety glasses are a must for any construction work, but especially for cutting or drilling of any kind.
  • Rasp or surform (for smoothing rough edges)
  • Power Saw (use a low-rpm portable saw with 3-1/2” carbide-tipped blade)
  • Hammer
  • Electric drill with (and a hole-saw bit if you have one)
  • V-notched trowel (5/32”)
  • Type 1 organic adhesive
  • Latex-fortified mortar
  • ¼” square notched trowel
  • Alkali-resistant, fiberglass mesh joint tape
  • Nails or screws
  • 1-1/2” 11 gauge hot dipped galvanized roofing nails, Durock tile backer screwrs for wood framing OR 1-1/3” Durock Tile Backer screws for wood framing or equivalent.

Now you are ready to begin your project!  Good luck and have fun!