Sheep Wool Loft Insulation Installation in Danbury This customer owned a very old property with a beautifully rustic, timber-framed loft in need of some new insulation. After clearing out the entire loft of all fibreglass, we cleaned, hoovered and began work on installing 240mm Sheep Wool with eaves ventilation to create a natural airflow in the loft.These photos demonstrate the impressive age and spaciousness of Mr. Dukelow’s loft, as well as how much safer it looks with insulation installed – but the benefits don’t end there. A perfect option for lofts with historic timber, the Sheep Wool insulation fitted will now work to draw excess moisture out of the air and surrounding materials for a lifetime or more.