Can Invizimelt be retrofitted to an existing roof?

Yes. Invizimelt can be retrofitted to existing roofs in two ways: panels can be installed over the roof edge shingle, sitting on top of the existing roofing at the eave line, or they can be installed under the roof edge shingle by lifting and relaying the lower courses of roofing material. The over-shingle retrofit method requires no shingle removal and is the faster installation — the panels are visible at the eave but concealed once any fascia or trim is in place. Both methods result in a fully functional, listed deicing system without a full re-roof.