Not every heated floor is a perfect rectangle. The DITRA-HEAT sheet is the fill piece that lets you complete your installation cleanly — covering the areas between the main roll runs, filling in corners, or handling an entire small bathroom on its own.

This is full DITRA-HEAT functionality in a single 8.4 SF sheet: uncoupling to protect your tile from subfloor movement, waterproofing, vapor management, and heating cable channels that accept DITRA-HEAT-E-HK cables at standard 3-stud spacing. Same performance as the roll, just a different size.

Specs

• Size: 3'2-5/8" × 2'7-3/8" (8.4 SF)
• Thickness: 1/4" (5.5 mm)
• Cable channels: Accepts DITRA-HEAT-E-HK at 3-stud spacing (~12.7 W/sq ft output)
• Backing: Polypropylene anchoring fleece

When to Use Sheets vs. Roll

• Use sheets for: Small bathrooms (under ~40 SF), filling in the cut-off area after a roll run, powder rooms, heated entry mats
• Use the roll for: Any installation over ~40 SF where buying a roll is more cost-effective per square foot
• Mix sheets and rolls freely — abut them edge-to-edge with aligned stud channels and the heating cable routes through both seamlessly

Installation Notes

• Bond to substrate with Schluter SET (concrete) or ALL-SET (plywood/OSB)
• Butt edges of sheet tightly to adjacent sections — no overlap, just alignment
• The heating cable snaps into stud channels and passes from sheet to sheet without interruption
• Tile over with unmodified thin-set SET or modified ALL-SET/FAST-SET
• In wet areas (heated shower floor), seal membrane seams with KERDI-BAND

Pro Tips

• Great option for a small en-suite or powder room. A typical 5' × 8' bathroom needs about 40 SF — two to three sheets gives you complete coverage without the cost of a full roll.
• Don't forget the floor sensor. Each DITRA-HEAT thermostat requires a floor temperature sensor. The sensor sits in a channel between the studs — route it during cable installation before tiling covers it up.
• Plan your cable before you set the membrane. Use Schluter's online DITRA-HEAT calculator to figure out the right cable size for your area. Then lay out the cable route on paper before cutting any sheets — there's no adjusting once the mortar is down.

Who Should Buy This

Homeowners heating a small bathroom or powder room, contractors needing fill pieces to complete a roll installation, and anyone doing a heated shower floor where DITRA-HEAT sheets cover the shower pan area cleanly.

Complete your system: DITRA-HEAT-E-HK heating cable (size for your sq footage), DITRA-HEAT thermostat (E-R, E-RT, E-WiFi, or E-RS1), Schluter SET or ALL-SET mortar.