I had my old boiler removed a few weeks ago and the flue has obviously been removed however the external grill is still in place (its only the size of the bottom of a lemonade bottle. I need to fill the hole up, but not sure of the best way.
It was a standard horizontal flue with a small flue head on it, which has remained externally as I have a conservatory aross the back of the house so it'd be difficult to remove. I then have a hole the diameter of the flue all the way through. I was just going to use expandable foam or alternavtively block up the grill end internally with a piece of wood cut to fit and then put in expandable foam. Any help reatly appreciated
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