Limestone Fixing Instructions
Fixing instructions for limestone on to suspended timber floor with electric wire under floor heating
1 Ensure that joists, floor boards, waterproof ply, tongue and grove, etc. are stable without excessive movement, screwed down, dust free and dry.
2 Cut Ditra matting to fit area then fix using Ditra Adhesive. Ensure sheets are overlapped and a kerdi matting skirting is used if the area is to be water proof.
3 Apply single part rapid flex white adhesive to the Ditra matting to create a level screed 2mm above the Ditra matting. Allow to dry.
4 Fix the under floor heating as per manufacturers instructions and test. Ensure that none of the heating elements are in contact with matting.
5 Fix the Tiles with a minimum 2mm grout joint using a rapid flexible adhesive, using a notched trowel to create a 4mm bed, using the solid bed method of fixing so that at least 90% of the tile is in contact with the adhesive and that the bed is free from voids. Also ensure that none of the heating elements are in contact with the tile. Allow to dry
6 Apply one thin coat of MN Stainstop to tile, after 15 mins remove any excess with a dry cloth.
7 Grout using a flexible floor grout, then thoroughly remove all residue.
8 Leave grout to dry for at least 24 hours, then wash tiles, once dry apply one/two thin coats of MN Stainstop to tile, after 15 mins remove any excess with a dry cloth.
9 Clean and set up a regular maintenance programme.
10 Do not switch on the under floor heating for at least 2 weeks and then only increase the temperature above room temperature by 2 degree increments per day until the desired temperature has been achieved.
Fixing instructions for suspended timber floors or floors where there is a mix of substrates, cracked old screed, green screed or water pipe underfloor heating systems
As above omit points 3 and 4 i.e. creating a screed etc., apply adhesive to the matting using a notched trowel and fix tile immediately to create a 3mm bed above the matting. Follow points 6, 7, 8 and 9
Fixing instructions for screeded floors with/without under floor heating
As above omit points 1, 2, 3 and 4 i.e. creating a screed etc. apply adhesive direct to a primed screed using a notched trowel and fix tile immediately to create a 3mm bed. Follow points 6, 7 and 8
N.B. New Screeds should dry out or cure before tiles can be laid; industry recommendation is 25mm per week, otherwise use Ditra matting as above.
Fixing instructions for wall areas i.e. plaster/plasterboard, ply, backer board and render
As above omit points 1, 2, 3 and 4 apply adhesive direct to a primed surface using a notched trowel and fix tile immediately to create a 3mm bed. Follow points 6,7 and 8.
For Dark Limestone to enhance the natural colour apply coats of MN Colour Intensifier, once the tiles have been fixed and before the MN Stainstop, until the desired hue has been achieved.
N.B. That although most of our limestones once sealed will have a low absorption making them resistant to staining, they are natural so they will be affected by strong acids & alkalis such as strong detergents, bleach, etc.
**ALWAYS ADHERE TO THE MANUFACTURERS INSTRUCTIONS AND BRITISH STANDARDS WHEN FIXING TILES OR USING TILING PRODUCTS**