Installation Instructions

3.1
APPLY SCRATCH COAT OF MORTAR
AND COMPLETE FLOORING
TILE
z Oncethecableshavebeeninstalledontheoor,applya‘scratchcoatofcement-basedmortaruniformlyovertheentireoorarea,
such that the heating cables are completely embedded. Self-leveling cement-based mortar compounds may be most appropriate for this
procedure,butconsultwithyourooringsupplierforadvice.
z Follow the compound manufacturer’s instructions for preparing the mix.
z Usingastraightedgetrowel,covertheentireoorarea,includingareaswithoutcable,tomaintainauniformoorheight.Onlyapply
mortar in the direction of the straight cable runs to minimize lateral movement between adjacent cable runs (Figure 11a).
z After the mortar is dry, repeat test of the system as per 2.4. The tile can be set in the usual manner. Floors with heating cables installed
are typically 3/16" higher than those without heating cables. Figures 11a and 11b illustrateeachofthesub-layersofanishedoor
whentileandlaminate/engineeredwoodareusedastheoornishingmaterials.
Figure 11a
Heating Cable
Tile Flooring
Trowelled Mortar
Scratch Coat
over Cable
Figure 11b