Felt Lap Vents Prevents Roof Condensation;Packs of 1, 10, 25 and 50;Easy to fit just slots between the felt laps.;Prevents roof condensation and moisture drops.;Can be installed from inside of loft

• 25 x Felt Lap Vents Prevents Loft roof Condensation. Attic Space Ventilation

25 x Felt Lap Vents Prevents Loft roof Condensation. Attic Space VentilationHomesmart