Top positive review
One person found this helpful
Good. Used to insulate heated cat boxes.
on 3 February 2014
These were just the right size [with the use of a wood saw] for filling the gaps between two cardboard boxes - a large one and a middle-sized one placed inside it. Onto the floor of the inner box goes a panel pet bed heater [preferaby large enough to cover the entire floor] and on top of that goes a nice soft area of bedding fabric. A small nick in the polystyrene will allow the panel electrical cable to emanate from the base of the concentric 2-box structure. After closing the top of each box, polystyrene sheets can be sawn to size to iie in the gap above the smaller box and just underneath the outer box - which can now be closed too. If waterproofing or damp-avoidance is necessary, a polythene surround to the whole assembly can be applied - but great care must be taken to avoid any possibility of suffocation to any indwelling animals! Vent-slots should be formed high up on the room-walls and an entrance door, high up enough to avoid draughts, can be covered with several layers of multi-sliced bubble polythene to allow for air circulation while preserving as much interior warmth as possible.