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If you have any questions or would like assistance, please contact our technical team:
- Email: technical@netweber.co.uk
- Telephone: (01525) 722 100
Our technical team is available Monday to Friday, 8:30am until 5.00pm.
The use of uncoupling membranes has become more common in recent years due to the variety of problems they can overcome. There are many different types of uncoupling membranes available which either have added features or should be used for certain situations, so it is always important to speak to the supplier before commencing.
Uncoupling membranes are usually used to uncouple the tiling layer from the substrate and thus reduce the stresses built up between substrate and tile. They can also offer waterproofing and channels for evaporation or heat exchange. Contact the supplier of the membrane prior to application to make sure that the correct uncoupling membrane/technique is being used.
The substrate must be clean and free from dust, grease etc. Any irregularities in the surface should be corrected so that the surface is level and without voids. Existing old asphalt should be lightly sanded to roughen the surface and then vacuumed to remove as much dust as possible. The membrane should be spread out on the floor, cut to size (allow expansion joints at perimeter) and then rolled back up.
weberset SPF should be combed onto the substrate using a 3x3mm notched trowel. The membrane should then be pressed into the adhesive bed using a rubber float in the direction the membrane is being laid to prevent air pockets forming. Adjoining sheets should be carefully abutted. All existing movement joints must be followed through the substrate and tiling layer.
Extra movement joints should be included on large areas as per BS 5385.
If the membrane is also to be used as a waterproofing layer, the joints between sheets, perimeter joints and movement joints need to be sealed. Spread a thin layer of weberset SPF across the joints and then bed a flexible layer of membrane into the adhesive. The membrane must overlap the joint by at least 50mm. For perimeter joints, the same method applies but care must be taken not to fill the movement joints at the edge of the sheets with adhesive.
Fix the tiles into a solid bed of weberset pro lite - rapid, weberset rapid SPF or weberset SPF. If the uncoupling membrane has cavities, fill these first with the flat edge of a trowel before spreading adhesive onto the membrane with a notched trowel. Grout the tiles with weberjoint wide flex or weberjoint premium and use weberjoint silicone sealant to fill perimeter movement joints.
If you have any questions or would like assistance, please contact our technical team:
Our technical team is available Monday to Friday, 8:30am until 5.00pm.
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