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Durabase CI+ Matting...
The Alternative to Ditra Matting

ci+ mattingFixing tiles onto problem floors has always been   difficult. How can you guarantee that the tiles will   stay in place? How can you guarantee the grout   won't crack out?

Without the confidence that these problems won't occur, can you afford to take on the job?

With the extra costs of preparing the sub floor will
the clients still want to put tiles on their kitchen or bathroom floor?

A Crack Isolation matting would seem to be the     answer. Over the years the design of these           products has dramatically improved giving a very high success rate. Better adhesives and an increasing experience in their use means they are now used on large and small projects Worldwide.

With almost no increase in installation height and with an impressive speed and ease of application, it makes sense to consider using them.

So why not?
Is it a fear of failure?

Improved design and better adhesives combined with experience means failure just doesn't happen. (OK, you might have to make some basic preparation. They're not a miracle product).

Is it cost?
When was the last time you actually checked out the real cost of using these products? Increased competition has, (like in so many things), lead to lower prices. We keep a close eye on the real costs of using the product and we are absolutely confident that you will save money, you will make more profit, it will make you more competitive, you will save your knees and you will, overall improve your day!

There are several of these products on the market – Ours is called CI matting 

Dural & Weber have released a training DVD on how to tile onto an anhydrite screed, using Weber tile adhesive & Dural ci matting.

CI Matting Price

Dural Ci+
Durabase CI+ Matting
A versatile mat for decoupling floor tiles, Durabase CI is especially suitable for laying tiles onto problem substrates such as wooden floors & anhydrite screeds
• Made of yellow polyethylene
• Only 3mm is added to the floor height
• Easy to cut
• Very cost effective, inexpensive to buy, plus fast to lay
• Bridges cracks
• Decouples floor coverings from their substrates

All prices are Inclusive of VAT
30M2 CI+ Matting is delivered Free of Charge. You will need to call our sales team on 01332 293030 to order.

Dural UK

Why use a matting?

CI+ matting is a product designed to alleviate stress caused by lateral movement within substrates normally viewed as unstable.

These would include: -
Green screeds where shrinkage is still occurring.
Fresh power floated concrete floors.
Timber based substrate such as Chipboard, Floorboards, Particleboard and MDF. Metal surfaces & Asphalt
It is also suitable for use with all under floor heating systems. Applying a rigid floor covering to such surfaces would normally be difficult.

CI matting is a simple fixing method to achieve satisfactory results with the minimum of cost and labour. The lateral movement of such surfaces would normally cause tiles to debond or crack. Because of the almost infinite combination of substrate and variations in ceramics, slates, marbles and other surfaces that could be used on a project it is impossible to provide a definitive guarantee for any specific project.

However if care is taken to ensure that any vertical flexing of the substrate is removed then a very high chance of success is likely. Dural is prepared to guarantee the performance of the product where we have been asked for our opinion as to its success. This would always be subject to the removal of vertical flex and that all work was carried out under our fixing instructions and with due professional care and diligence. In short the product does not work miracles it can only function correctly where it has been fixed in the correct manner.

Key points Avoid vertical movement. In the case of wooden substrates a rough guide would be that any movement should be similar to that of a floor overlaid with ply. This can normally be achieved by making additional screw fixings through the original boards.

Use an adhesive that will adhere to the substrate and mechanically grip the fleece on the underside of the mat.
(An analogy would be as chewing gum sticks to a carpet. It isn't stuck it has trapped the fibres of the material).

The use of flexible adhesives and grouts can be beneficial.

Fixing CI matting

Fixing CI matting is a simple and easy installation.
Cut the CI matting to fit the subfloor you are covering.
Adhered to the subfloor using a 4x4mm notched trowel, pressing the fleece side of the CI matting firmly into the adhesive bed.
Trowel more adhesive on top of the CI matting to fill the wells and using a suitable trowel for the tiles, lay the tiles as you would normally

CI Matting installed CI matting on Underfloor Heating

creacking concreteThe increased stress within the installation caused by thermal movement can cause problems to the installer. Separation or Isolation Membranes are ideal for removing shear stress from tiled installations. This removes a major obstacle to fixer confidence in installing these systems.

By absorbing this stress the membrane allows the tiled surface to remain intact. The air spaces under the membrane have two benefits, they allow residual moisture to gradually escape therefore helping to prevent cracks forming in the substrate. The air spaces also allow the heat to be spread evenly across the floor surface making the heating action more general and effective.

CI matting requires no special precautions when used within a heated installation.

The only requirement is the selection of an adhesive suitable for use with the substrate. This adhesive must be capable of bonding to the substrate and achieving a mechanical fix with the fleece on the underside of CI matting.

The electrical heating elements should be installed underneath the CI matting following the manufacturer' instructions. Standard thin set adhesive can be used to fix tiles in place. A modified flexible grout should be used to complete the installation.

CI matting wooden floors

These supplementary instructions are issued to allow the successful use of CI matting on this common substrate. Because of the large amount of movement encountered on this demanding substrate, it is important that these instructions are followed carefully.

1. All floorboards must be free of flex and vertical movement. CI Matting can absorb horizontal stress, but cannot accept vertical movement. Screw down any loose boards. If a stable surface cannot be achieved, consider overlaying the floorboards with a suitable plywood covering. Because each installation varies it is impossible to give a definite guide but usually a 8mm plus thick board gives sufficient stability for the use of CI matting.

2. Check for warping across the board width. This can be a cause of failure in the bond between the underside of the matting and the substrate. Again if severe warping is present overlay the floorboards as above. A self-levelling compound can also be used following the manufacturers instructions as for the need for priming and surface preparation etc.

Fixing the matting
1. Using an adhesive suitable for fixing onto wooden substrates and following the adhesive manufacturers advice for any priming or surface preparation, apply the adhesive to the surface using a 6mm notched trowel. This should provide a bed of 6mm width x 3mm height ribbed adhesive. Take care to ensure that the adhesive bed is even, without excess in any depressions in the surface. Do not attempt to use the adhesive as a levelling compound. If too much adhesive is present, the result can be that the underside of the matting will become filled with adhesive and the product will not be able to function.

2. Using a flat grouting float press the matting firmly into the adhesive bed.

3. The aim should be to achieve good adhesion to the fixing webbing without filling the cavities in the matting.

Fixing the tiles
1. Follow the basic instructions for CI matting.

2. Use a flexible adhesive and grout.

We would advise that tiles below 20mm x 20mm should not be used with CI matting.

CI matting on Gypsum, Anhydrite or Calcium Substrate screeds

tiling problem & solutions-tiling onto anhydrite screedsTiling onto these substrate presents certain problems. These fall into two areas: -

1. Residual Moisture within the screed.
2. A friable surface caused by loose material or laitance.

Residual moisture.
Screeds of this type are very sensitive to moisture and must be "dry" before any floor covering can be fitted.
BS 5385 Code of practice for ceramic tiling states this should be 0.5% moisture content or less.
BS 8204 Code of practice for pumpable screeds states that the residual moisture in the screed should not exceed 75% RM.

It is therefore vital that the moisture content of the screed is checked and verified before any floor covering is laid. A failure to undertake this basic check will void the guarantee.

It should be noted that any subsequent moisture penetration of the screed can cause damage as the screed can "soften" causing debonding.

Friable Surfaces
As this type of screed material cures it develops a smooth top layer. This is composed of loosely bonded particles that can appear to be solid and an ideal surface onto which to tile. Unfortunately it isn't! It is weak and WILL break down causing debonding.

In order to fit CI matting onto this type of surface the following steps must be followed. This advice also applies to the direct fix of any Floor covering.

In order to obtain a satisfactory bond of the CI membrane to the screed surface a moisture test must be carried out that meets the standards described above.

The "loose" surface of the screed must then be mechanically scraped or scabbled. The soft material will be removed fairly rapidly until the hard solid core is exposed.

This surface must then be treated with a primer as recommended by the adhesive manufacturer. This primer serves to protect the gypsum in the screed from the cement in the adhesive, preventing the formation of Etrinite crystals, which cause tiles to debond.

Once the surface preparation is complete the CI matting is fixed in the normal method.
1. The Mat is cut to size and put on one side.

2. A thin layer of cementacious tile adhesive is spread over the surface and the Mat is pressed firmly into place. Subsequent strips / pieces are laid abutting each other. Sealing tape being used if there is any danger of water penetration of the installation.

3. Tiling can take place immediately using a notched trowel suitable for achieving solid bedding of the specific tile.

The installation should be completed using a flexible grout.

Durabase CI is a perfect substitutes for Schluter Ditra mat for tiling projects.

Size of Mat 30m2 (also supplied in m2)

Down Load Data Sheet.
dural ci matting image

Tile Town

15 Enterprise Way,
Jubilee Business Park,
Stores Road, Derby
DE21 4BB
Tel: 01332 293030
Fax: 01332 291430

Tile Town
South Normanton

131 Market Street,
South Normanton,
Derbyshire DE55 2AA
Tel: 01773 581358
Fax: 01773 581358

VAT No: 543 7032 60
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