What, if anything, is the biggest reason preventing you from adapting your home to make it more energy efficient (e.g. solar panels, heat pump, or loft, wall or floor insulation)?
Beth, os unrhyw beth, yw'r rheswm mwyaf sy'n eich atal rhag addasu eich cartref i'w wneud yn fwy effeithlon o ran ynni (e.e.