Solar vs Double Glazing

Should I get solar panels or double glazing first?

Solar panels vs double glazing — which should you invest in first? SOLAR PANELS: Cost £5,500-£9,000. Save £580-£1,100/yr. Payback: 8-12 years. ROI: 100-400%. DOUBLE GLAZING: Cost £5,000-£10,000 (whole house). Save £100-£200/yr on heating. Payback: 25-50+ years. ROI: low. CLEAR WINNER: Solar panels — 3-5x the annual savings at similar cost. HOWEVER: if your home has single glazing, the comfort improvement from double glazing is significant (warmer rooms, less noise, less condensation). Best strategy: install solar first (highest ROI), then double glazing when windows need replacing anyway. Both together save £680-£1,300/yr.