A cold attic floor can make the rooms below feel uncomfortable, but insulation and electric floor heating solve different problems. Insulation limits heat moving through the floor assembly, while the Warmup systems listed here provide radiant heating beneath finished flooring. For homeowners planning an attic conversion, a garden room, or a renovation above a garage, the right choice depends on the floor area, installation method, and heating-control needs.
The Lineup, Simplified
Warmup DCM-PRO 390W Heating Cable
Warmup DCM-Pro 390W Heating Cable
Warmup DCM-PRO 525W Heating Cable
Warmup DCM-PRO 195W Heating Cable
Warmup StickyMat 560W Mat
Warmup Terra White Thermostat
Warmup StickyMat 350W Mat
A Closer Look At Each Pick
The 30-square-foot DCM-PRO cable sits in a useful middle ground between a small-room kit and a larger installation. Its 390-watt rating and 13-watt-per-square-foot output make it relevant for a compact bath, entry area, or converted attic room with a defined heated zone.
Unlike the adhesive-based StickyMat choices later in this list, the DCM-PRO works with fleece-backed or peel-and-stick membranes. That arrangement suits installers who want more control over the heating membrane, though the membrane and floor build-up must be planned as one system.
Everyday Wins
- Matches a moderate 30-square-foot heated area without moving to the larger 40-square-foot kit.
- Provides 13 watts per square foot, giving you a clear output figure for system planning.
- Works with two membrane approaches, which can simplify compatibility checks.
- Includes patented anti-fracture protection for the cable installation.
Trade Offs
- This is radiant heating equipment, not attic-floor insulation.
- The fixed 30-square-foot layout must closely match your floor plan and cable spacing.
Quick Facts
The Right Fit
You benefit most when you have a roughly 30-square-foot heated zone and prefer a membrane-based cable installation over a self-adhesive mat.
A Better Fit Elsewhere
The Warmup StickyMat 350W Mat suits you better when a 25-square-foot adhesive system fits the project and you want fewer membrane decisions.
For a 30-square-foot floor, the DCM-Pro keeps the same 390-watt output and 13-watt-per-square-foot heating density as the first cable, but adds remote heating checkups. That added assistance matters for projects involving multiple rooms, tricky layouts, or installers who value support beyond the initial setup.
The cable remains a membrane-based underfloor system rather than insulation or portable heating. Its fleece-backed and peel-and-stick options give you some installation flexibility, although your floor build-up still determines the practical result.
A Favorable Mix
- Covers 30 square feet with a 390-watt rated output.
- Provides remote heating checkups for added project support.
- Supports fleece-backed and peel-and-stick membrane methods.
- Uses patented anti-fracture protection within the cable.
Worth Noting
- Remote checkups add support but do not replace careful system design.
- You must match the cable to a compatible floor and membrane arrangement.
Feature Snapshot
Made For
You benefit most when a moderate floor area needs a cable system and remote support would make a more involved installation easier to manage.
Another Choice May Suit
The Warmup StickyMat 560W Mat fits you better for a larger 40-square-foot area where pressure-sensitive adhesive is your preferred installation method.
A larger room or combined heating zone gives this 40-square-foot DCM-PRO more room to work. Its 525-watt rating scales the same 13-watt-per-square-foot density used by the 30-square-foot cable, so the main decision is the size of the area rather than a different output density.
Compared with the 195-watt DCM-PRO, this kit covers substantially more floor, making it more relevant to a larger conversion or an open-plan area. It remains an embedded heating cable, so proper membrane selection and planned cable placement are central to the installation.
What Helps Most
- Handles a larger 40-square-foot heated area than the 30-square-foot cable.
- Preserves the same 13-watt-per-square-foot output density across the Warmup DCM-PRO range.
- Adds 90 watts of rated output compared with the 390-watt kit.
Minor Gripes
- The larger area may be excessive for a compact attic conversion.
- Fixed coverage requires careful floor-plan planning before installation.
Core Details
Who It Suits Best
You benefit most with a larger floor area where a 40-square-foot cable layout fits naturally within the room’s dimensions.
Consider Something Else When
The Warmup DCM-PRO 195W Heating Cable suits you better when 15 square feet is enough and a smaller kit reduces unused cable.
For a small utility room, compact bath, or narrow heated strip, the 195-watt DCM-PRO focuses on 15 square feet. That focused footprint can be easier to integrate than a larger kit, particularly when the floor plan has obstructions or only one section needs warmth.
The 120-volt cable is designed to work with fixing strips or uncoupling membranes, which are sold separately. Those additional installation components make it less of a standalone project, but they also give you more control over how the heating cable is supported and spaced.
Useful Touches
- Keeps the heated area focused at 15 square feet.
- Uses the same 13-watt-per-square-foot output density as the larger cables.
- Supports fixing-strip or uncoupling-membrane installations.
Practical Considerations
- Fixing strips and uncoupling membranes require separate purchases.
- The cable supplies warmth but does not replace attic-floor insulation.
Right Fit For
You benefit most in a small, clearly defined zone where a 15-square-foot 120-volt cable is easier to plan than a larger mat or cable.
Look Elsewhere When
The Warmup StickyMat 350W Mat suits you better when you want 25 square feet of adhesive-backed coverage and fewer separate membrane components.
The 40-square-foot StickyMat uses pressure-sensitive adhesive to reduce the number of separate membrane choices during installation. That makes it appealing for a larger attic conversion, studio, or open room where you want a clearly defined heating layer beneath the finished floor.
At 560 watts, this mat pairs broad coverage with a floor-heating format that can be rolled or positioned according to the room layout. The practical trade-off is that adhesive installation depends on planning the mat’s position before the floor build-up progresses.
Useful Highlights
- Uses pressure-sensitive adhesive for a streamlined installation process.
- Covers 40 square feet with a 560-watt rating.
- Adds patented anti-fracture protection.
- Offers fleece-backed and peel-and-stick membrane options.
Things To Consider
- You must place the mat carefully because adhesive makes repositioning difficult once it is fixed.
- The 40-square-foot format may be too broad for a small room.
Feature Facts
Built With In Mind
You benefit most on a 40-square-foot floor where adhesive placement offers a more direct route than laying a separate cable membrane.
Swap It Out When
The Warmup StickyMat 350W Mat fits you better when 25 square feet better matches the room and you want to limit unused material.
The Terra controls an underfloor heating system rather than generating heat on its own. Its Wi-Fi connectivity, SmartGeo technology, and programming-free setup make it a useful companion to a cable or mat once your primary decision is heating control rather than area coverage.
The white finish suits contemporary interiors without demanding a visually prominent wall unit. A support plan also covers eligible accidental damage and breakdowns, with parts, labor, and shipping included according to the plan’s terms, while 24/7 support is available when questions arise.
A Few Strong Suits
- Adds Wi-Fi control to a compatible underfloor heating setup.
- Uses SmartGeo technology for heating management.
- Requires no initial programming, reducing setup complexity.
- Offers 24/7 support and eligible repair coverage.
Small Caveats
- You still need a separate heating cable or mat to warm the floor.
- Protection details and eligible repairs depend on the associated plan terms.
Who Will Love This
You benefit most when your floor-heating installation is complete and you want convenient temperature and scheduling control from a modern thermostat.
Not Your Match When
The Warmup DCM-Pro 390W Heating Cable suits you better when your priority is adding heat-producing coverage rather than controlling an existing system.
At 25 square feet, this StickyMat sits neatly between the 15-square-foot DCM-PRO and the 40-square-foot StickyMat. The pressure-sensitive adhesive gives you a direct way to position the heating layer, while the 350-watt rating suits a defined room or medium-sized heated zone.
For a small apartment bathroom or compact attic room, that middle-sized footprint can be easier to incorporate than a broad mat. Plan the layout before fixing the adhesive because moving the mat after installation becomes far less convenient.
The Value In It
- Provides a mid-sized 25-square-foot heating area.
- Uses pressure-sensitive adhesive for direct floor placement.
- Adds patented anti-fracture protection to the mat.
Possible Compromises
- The 25-square-foot area may leave too little coverage for a large room.
- Accurate placement is important before the adhesive takes hold.
Key Product Details
Made For
You benefit most in a compact room where 25 square feet of adhesive-backed radiant heating matches the available floor area.
Where A Sibling Pick Shines
The Warmup StickyMat 560W Mat suits you better when the floor plan needs a full 40 square feet of adhesive-backed coverage.
A Practical Plan for Attic-Floor Comfort
Start with the floor’s role
Insulation for an attic floor reduces unwanted heat transfer through the assembly, while radiant heating warms the finished surface from below. Decide whether your project needs thermal resistance, active heating, or both, and avoid treating a heating cable as a substitute for insulation.
Match coverage to the layout
Measure the intended heated zone before choosing between 15, 25, 30, or 40 square feet. Leave space for walls, fixed furnishings, and room geometry, then confirm that the selected kit’s output and footprint suit the planned cable or mat layout.
Check the installation stack
Cables require compatible membranes, fixing strips, or uncoupling systems, while adhesive mats need careful placement within the floor build-up. The finished floor, threshold details, electrical provisions, and thermostat location should be considered together before installation begins.
Plan for long-term control
A thermostat adds scheduling, temperature control, and remote functions to a compatible heated floor. Choose it alongside the heating equipment rather than after the floor is complete, so control wiring and placement can be incorporated into the project.
Common Mistakes to Avoid Before Installation
Common Shopping Slip Ups
The easiest mistake is treating radiant heating as insulation, even though the two perform different jobs. Another common error is selecting a kit by room label rather than measured floor area, then discovering that the mat or cable does not suit the actual dimensions.
What Separates Premium From Basic
Larger area coverage, added support, and smart controls distinguish the options here, but extra capability does not improve an unsuitable layout. A compact 15-square-foot cable may serve a narrow room better than a 40-square-foot mat, while the Terra thermostat matters only after the heating layer and electrical plan are established.
Frequently Asked Questions
Do these products provide attic-floor insulation?
No. These products provide electric radiant heating or control it, but they do not add insulation to an attic floor.
Can Warmup DCM-PRO cables heat an attic floor?
Yes, provided the floor build-up, membrane, electrical arrangement, and cable layout are compatible with the heating design.
What is the difference between StickyMat and DCM-PRO?
StickyMat uses pressure-sensitive adhesive for direct placement, while DCM-PRO is a heating cable used with compatible fixing or membrane systems.
Which heating area should you select?
Choose the listed area that closely matches your measured heated zone, accounting for walls, furniture, and obstacles.
Do you need a thermostat for underfloor heating?
A thermostat gives you temperature and scheduling control, while a cable or mat provides the physical heating layer.
Final Verdict
Start by separating insulation from radiant heating in your attic-floor project. Use the DCM-PRO or StickyMat options to match your measured area and installation method, and add the Terra thermostat when smart control completes the system. Choosing the right layer first makes the rest of the build much easier to plan.