July 10, 20224 yr New build in progress Ducts going down through screed/insulation/concrete slab & out through external walls. Ducts are open at both ends. How to ensure a) no vermin can enter the house through the ducts b) air/heat exchange with the exterior is minimised
July 10, 20224 yr 2 minutes ago, WWilts said: Ducts are open at both ends. Close them at the outer end but also protect the cables there as they can be chewed through. I have, in the past used stainless steel wool, oven cleaner type stuff, forced down to simply close the gap, this can be pulled out if needs be, does not rust, allows a little air flow - if you want to seal it to air you have to work harder and cannot be chewed through by your average rodent / vermin!
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