Key Takeaways

• South-facing is best: Captures the most winter sunlight. South-east is even better for morning warming that dries condensation.
• Ridge east to west: The longest glass side faces south, gaining 25% more winter light than a north-south ridge.
• 2 metres minimum from structures: Keep clear of walls, fences, and buildings. Stand further from trees than their full height.
• Level ground prevents frame damage: A 10mm slope across 6ft stresses every glazing bar. Doors and vents jam.
• Narrow end into the prevailing wind: South-west in most of the UK. Halves wind resistance during storms.
• Close to water and power: Within hose reach of an outdoor tap. Electricity for heaters and auto-vents costs less if the run is short.