09/01/2026
Thin Internal Wall Insulation (TIWI)
TIWI is a modern insulation system designed to improve warmth and reduce damp without the disruption of traditional internal insulation.
In most case, it uses natural cork insulation applied at just 5mm thickness, then finished with plaster.
Why TIWI is different (and better for many homes)
🟢 Only 5mm thick – unlike insulated boards that are 25–60mm+
🟢 No need to remove skirting boards
🟢 No need to remove architraves or door frames
🟢 Minimal room size loss
🟢 Ideal for existing homes, not just renovations
Problems TIWI helps solve
❄️ Cold rooms
🦠 Damp and black spot mould
💨 Cold internal wall surfaces
🏠 Poor thermal comfort in older properties
Extra benefits of cork TIWI
Natural and breathable
Helps regulate moisture
Reduces condensation
Improves thermal comfort quickly
Finished with a smooth plastered surface
Call Mike Powell 07368 532 890
