Home / Miscellaneous questions / Warmup Insulated Underlayment -WIU
Should I install the WIU with the foil side up or down?
WIU should be installed with the foil side facing DOWN. This foil backing acts as a moisture barrier.
Quoting Tools: instant, accurate, flexible
Warmup offers an extensive range of electric floor systems compatible with all floor types, rooms and projects.
Indoor Systems
- ✓ Ideal as a primary heat source for whole-house heating
- ✓ Ideal for zones less than 250ft²
- ✓ Ideal for single rooms
- ✓ Does not alter floor levels
- ✓ Great for renovations
![Thumbnail [200x250]](/wp-content/uploads/Indoor-Systems-Page-Image.png)
Outdoor Systems
- ✓ Ideal for zones under 3,000ft²
- ✓ Ideal for residential and commercial projects
- ✓ Compatible with existing roofs & driveways
- ✓ Works with asphalt, concrete, and pavers
- ✓ Great for new construction
![Thumbnail [200x250]](/wp-content/uploads/image-13.png)
Projects Division Consultation
- ✓ Bespoke heating solutions for new-build projects and larger renovations
- ✓ Dedicated team to work with you
- ✓ Detailed system layouts for each stage of the project
![Thumbnail [200x250]](/wp-content/uploads/Projects-Image.png)