1. Find your house
Enter your postcode or address to help you find your own house.
2. Select your roof
Click in the map on all corners to select your roof, preferably without obstructions and South facing.
3. Highlight your gutter
Click inside the selected area until you highlight the lowest side of your roof (select any side for flat roofs).
4. Use dropdowns below
Use the dropdown boxes below to estimate your roof angle, level of shading and your energy usage.