One of the best tracers of massive stars is the rate of supernovae in galaxies. Studies of the supernova rate in galaxies are though severely affected by the line of sight extinction. Geometrical effects (e.g. edgewise presentation) may lead to the majority of supernovae that appear in a galaxy being undetectable in the visible. We propose to use CanariCam on the Spanish 10m Gran Telescopio Canarias to measure the true supernova rate in a sample of galaxies, independent of extinction and line of sight effects, by measuring at 10 micron where the extinction is almost negligible. This system allows Type Ia SNe to be detected out to 100 Mpc in 120 s of integration, thus 360 galaxies per year for which we are sensitive to SNe can be covered per hour of telescope time per month.