Dural Durabase CI Tile Underlayment 165 thru 310 sq ft roll (5 sq ft increments)

Dural Durabase CI Plus 165-310 sq ft rolls

*Sold in 5 sq ft intervals.  Durabase width measures 3'3" wide.             

*If your order requires any sq ft amount between the sq ft intervals shown in the drop down menu under the time remaining , let us know and we will adjust your invoice to allow for the change.  Purchase the 5 sq ft interval that is below the amount you require and when you click the pay now button you can click the request a total from seller link on the following page.  We will then add the additional amount to your total for the additional sq ft you require in your message. 

*Buy with confidence from an experienced seller.  We strive to make your transaction with us a pleasant one.  As always, we appreciate your business.  

*All orders shipped will include manuals for any installation questions you may have.  Do not hesitate to ask if there are any other questions we can answer for you.  You can also visit dural.com for the most up to date information from the manufacturer.

Outside Lower 48 State and International Shipping:

Please message us with your planned order and we will prepare a quote with shipping for your order.

Product Information

*Overview*

Durabase CI Plus is an extremely versatile floor underlayment designed specifically for tile and natural stone installations.  Durabase CI neutralizes stresses and isolates cracks in the substrate, installs over difficult substrates, is lightweight and saves installation labor time versus traditional cement board materials.  The easy carry rolls are made of lightweight polyethylene with specially undercut pockets achieving a very high rigidity combined with ideal bonding to thin-set mortars.  With an installation height of 1/8", Durabase CI easily transitions to other surfaces.  Durabase CI is elastic, rot proof, and resistant to aggressive substances and liquids such as alkalis, solvents and oils.

*Material*

• Durabase CI Plus is Waterproof.  It's HDPE polyethylene provides moisture control, flexibility, resistance to mold and mildew and provides a reliable waterproof layer in the floor system.  Its polyethylene composition protects the subfloor from moisture penetrating through to your floor.  This is of extreme importance in todays building environment.

• Durabase CI Plus offers superior point load distribution.  The HDPE polyethylene with column like pattern creates strength for support and load distribution.  The cylinder design allows moisture vapor management, so where moisture can be a concern, Durabase allows moisture vapor to wick into the cylinder columns patterned throughout the underlayment.

• Durabase CI Plus eliminates cracking and unstable substrates.  It offers an uncoupling layer through a non-woven fleece and column like structure which allows in-plane movement through the support columns thus eliminating the major cause of cracking and delaminating of the tiled surface.

• Durabase CI Plus has the ultimate locking system.  A unique polyethylene scrim located on top of the underlayment locks the tile flooring to the underlayment creating a one part system that is able to float over the movement of your home.  This integral part of the Durabase CI is what seperates the CI mat from its competition.

 *Approved Substrates*

Wood Subfloors

• 16" on-center joist spacing, minimum subfloor thickness 5/8".
• 19.2" on-center joist spacing, minimum subfloor thickness 3/4".
• 24" on-center joist spacing, minimum subfloor thickness 1-1/8" (double layer 3/4" +3/8").

Concrete

• Over any structurally sound and even concrete subfloor.
• Green concrete/young concrete cured less than 28 days.
• On or below grade concrete subject to moisture migration.  Seams in Durabase CI must be taped with Durabase band to create a total moisture barrier.
• Post-tension or pre-stressed concrete.
• Cracked concrete (In-plane movement only).

*Limitations*

• Minimum 2x2 tiles
• Concrete slabs with moisture migration require the Durabase CI Plus seams to be taped with band for moisture protection.
• Cracks in concrete can only be in-plane.  Durabase CI Plus cannot overcome vertical cracking in a concrete subfloor.

*Installation Procedure* 

*Once the substrate is fully prepared (level, clean and stable).  Dural USA acknowledges that modified and non-modified thin set mortars will work with their Durabase CI Plus underlayment.  Dry times can vary with different types of thin-set products.  Refer to the thin-set manufacturers recommendations for best results with these types of  uncoupling underlayments.

Step 1.  Measure the installation area and cut the Durabase CI Plus mat to fit.  Do not butt pieces of Durabase CI Plus mat tightly against each other.  Leave room for expansion or contraction joints of 1/8".  The recommended tool for cutting Durabase CI Plus mat are a razor knife and/or straight-edged scissors.

Step 2.  Mix the thin-set to the consistency of creamy slurry that can easily be rubbed into the fibers on the bottom of the mat.  If applying Durabase CI Plus mat to concrete it is recommended that you wipe down the concrete surface using a damp sponge.  This is to remove any residue or film lying on the concrete.  This will also hydrate the concrete, resulting in a better bond.

Step 3.  Use the flat side of your trowel to key or force-fill any holes or voids in the subfloor.  This will also help in bonding the thinset to the subfloor.

Step 4.  Your trowel may be of 3 different designs.  The first one listed next is the preferred notch size.  Using the a.(1/4" X 3/16" V notch), b.(3/16" X 3/16" U notch), or c.(3/16" X 3/16" square notched) side of your trowel, apply the thin-set.  Once the thinset has been troweled up, place the Durabase mat in the thinset while it is still workable and not slaked over.

Step 5.  Rub the Durabase with pressure using a grout float or flat side of your trowel to embed the mat into the thinset.  You'll want 100% coverage.  Once the mat is applied pull up a corner of the mat to make sure you have that.

Step 6.  If your installation requires a fully waterproof tile substrate, you may now apply the band to your seams.  Using a 3/16" X 3/16" V notched trowel apply unmodified thinset to the joint area.  Embed the band into the Durabase using the flat side of your trowel to remove any air bubbles under the band. 

Step 7.  Install ceramic, porcelain and or natural stone no smaller than 2" X 2" on Durabase CI using unmodified thinset.  Using the flat edge of your trowel, key in the holes or voids with the appropriate trowel for the size of tile being installed.  Turn trowel over and use notched side to trowel up thinset to bed tile.

Step 8.  When installing tile, use expansion joints at 20' to 24' intervals or above isolation joint.  When installing over crack isolation joints, you do not have to saw the tiles directly over the joint.  You can offset the tile by the length of the whole tile, so it breaks at the normal grout joint.  Leave a 1/4" expansion area around the walls.  Do not hard grout expansion or wall joints.  Use a flexible product in joints like 100% colored silicone to match your grout color.  Expansion profiles are also available for use in place of the soft silicone joint.

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