Hello,
With the cold weather coming in Melbourne, I'd like to cover my evaporative cooling vents in the ceilings throughout the house, by blocking the gap underneath the vents. I don't want to access the VEU program where you can get covers installed over the vents, as I'd prefer to buy something that will sit underneath the vents.
I'm thinking polystyrene foam boards and cutting them to size, to squeeze them into place in the vent hole, then placing the grill itself back in the hole.
Can you please let me know if this is the best approach? Or, if another material would be better? Looking for something easy to work with that I can cut to size and that will keep the draught out - thanks!