Improving energy efficiency in period properties requires breathable, reversible solutions that don't harm historic fabric. Effective approaches include: breathable internal wall insulation using lime-based systems, wood fibre, or aerogel (achieving U-values around 0.45-0.65 W/m²K without trapping moisture), secondary glazing (retaining original windows while improving thermal performance by 40-60%), draught-proofing using traditional materials, floor insulation using breathable materials like sheep's wool or wood fibre boards, roof insulation using natural materials, upgrading to efficient heating systems like air-source heat pumps or infrared panels (which work well with solid walls), solar PV panels on non-prominent roof slopes (often permitted), and smart heating controls. Avoid cement-based renders, foam insulation, or vinyl paints that prevent breathability. For listed buildings, all improvements need Listed Building Consent. We specialize in heritage-appropriate solutions that improve comfort and reduce bills while preserving building character and fabric.