Measurement Guide

• DITRA-HEAT / DITRA-HEAT-DUO membrane is selected according to the size of the area to be tiled
• DITRA-HEAT-E-HK heating cable is selected according to the size of the area to be heated
• DITRA-HEAT-E-HK heating cable selection will also be impacted by choice of cable spacing
depending upon the specific application
1
• Applications that combine DITRA-HEAT-E-HK heating cable(s) with AFCs (Alternate Floor Coverings)
require the use of a continuously alternating 3-2 stud spacing
2
• The allowable heated area is limited by the minimum required spacing from fixed elements
3 – See chart above
• Multiple DITRA-HEAT-E-HK heating cables can be connected in parallel and controlled by a single DITRA-HEAT-E thermostat,
if the total current is less than 15 amps
• If the total current is over 15 amps, an additional DITRA-HEAT-E thermostat or DITRA-HEAT-E-RR power module is required
• IMPORTANT: Heating Cables CANNOT BE CUT to fit or installed under any fixed objects with no air space beneath
• For a complete list of all installation requirements, please refer to the DITRA-HEAT Installation Handbook
Notes:
1. See the Installation, Warnings, and Heating Cable Specification sections of the DITRA-HEAT Installation Handbook
2. See the Alternative Floor Coverings and Heating Cable Specification sections of the DITRA-HEAT Installation Handbook
3. See the Warnings section of the DITRA-HEAT Installation Handbook for a complete list
Step 1 - Draw room
Step 2 - Calculate membrane required
Step 3 - Calculate cable size(s)
Draw the room floor plan on the other side of this sheet.
Measure areas where the membrane will be installed. The total will tell you how much DITRA-HEAT or DITRA-HEAT-DUO membrane is required.
Measure areas where the heating cable is to be installed. The total tells you the maximum DITRA-HEAT-E-HK heating cable amount. Remember to account for required
clearances: walls, partitions, and fixed cabinets is 2"; plumbing drains is 4"; heat sources is 8"; centerline of toilet drains is 7"
Schluter
®
-DITRA-HEAT
Calculation Sheet
Both membrane and cables need to be calculated.
FOLLOW THE STEPS BELOW:
DITRA-HEAT or DITRA-HEAT-DUO
Membrane
DITRA-HEAT-E-HK
Heating Cable
64"
48"
72"
77"
A
1
A
2
25"
28"
45"
24"
72"
2" clearance
15"
68"48"
B
1
B
2
B
3
B
4
Buffer
zone
Example
Example
Area Dimensions Total
A
1
64" x 48" 3072 in
2
A
2
77" x 72" 5544 in
2
A
3
- -
A
4
- -
Divide total by 144 to get measurement in ft
2
8616 in
2
÷ 144
Grand Total Membrane 59.8 ft
2
Area Dimensions Total
B
1
15" x 48" 720 in
2
B
2
28" x 68" 1904 in
2
B
3
45" x 72" 3240 in
2
B
4
25" x 24" 600 in
2
Divide total by 144 to get measurement in ft
2
6464 in
2
÷ 144
Grand Total Heating Cable 44.9 ft
2
Try the Calculation Sheet…
or Download our App with
DITRA-HEAT Estimator!
scan here
NOTE: This is a typical estimation for the installation of ceramic and stone tile.
For applications using alternative floor coverings, please refer to the Alternative Floor Coverings section of the DITRA-HEAT Installation Handbook
When choosing the appropriate heating cable(s)
size(s), please consider whether you require 3 stud
cable spacing or alternating 3-2 stud cable spacing.
Minimum spacing requirements from:
Fixed elements
Distance
in. mm
Walls, partitions, and fixed cabinets* 2 50
Plumbing drains 4 100
Forced air heating vents 4 100
Heat sources
(baseboard heaters, fireplaces, etc.)
8 200
Centerline of toilet drains 7 180
Linear drain (channel body edges) 1 25
* From toe-kick recess