Slate Fixing Instructions


Fixing instructions for Slate 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 & test. Ensure that none of the heating elements are in contact with matting.

5 Fix the Tiles with a minimum 2 mm joint using single part rapid flex white adhesive using a notched trowel to create a 4 mm bed again ensure that none of the heating elements are in contact with the tile. Wash tiles and allow to dry

6 Apply one thin coat of MN Slateseal 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 Slateseal 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 on 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 & 4 i.e. creating a screed etc, apply adhesive to the matting using a notched trowel and fix tile immediately to create a 3 mm bed above the matting. Follow points 6,7,8 & 9

Fixing instructions for Screeded Floors with/without under floor heating

As above omit points1,2,3 & 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 3 mm bed. Follow points 6,7 & 8
N.B. New Screeds should dry out or cure before tiles can be laid; industry recommendation is 25 mm per week, otherwise use ditra matting as above.

Fixing instructions for walls areas ie plasterboard, ply, backer board & render

As above omit points1,2,3 & 4 apply adhesive direct to a primed surface using a notched trowel and fix tile immediately to create a 3 mm bed.. Follow points 6,7 & 8. Slate is too heavy to be fixed to plaster walls.

N.B. That although most of our slates once sealed will have a low absorption making them resistant to staining, they are natural so they will be affected by acids & alkalis such as strong detergents, bleach etc.

Also, when using silicone please ensure they are (acetone free) low modulus and produced for use with natural materials.

** ALWAYS ADHERE TO MANUFACTURERS INSTRUCTIONS WHEN USING ANY TILES OR TILING PRODUCTS**

A LIST OF RECOMMENDED TILERS IS AVAILABLE ON PURCHASE.