Earthy smell in conservatory/living room

Just wondering if anyone can shed some light please.
Father in law built a diy conservatory on the back of my living room (which is the only point of access to the garden) in December. The last couple of months I've been smelling a sort of musty earthy smell, made worse when it rains. I thought it was just isolated to the conservatory, but if I walk into the living room from the hallway I can smell it also. Sometimes the smell is very apparent, and sometimes I can't smell it at all. I keep all the windows and doors in the living room open and a window in the conservatory open during the day. I'm wondering if it's coming from the floor as I can smell it very strongly when I'm cleaning down there. The base is a durabase with steel joints, polystyrene insulation with chipboard as the floor base. I'm at a bit of a loss on how to find the cause of the smell, help appreciated!
Thanks

Comments

  • Did you build the conservatory over the top of your airbricks, meaning your subfloor is no longer properly ventilated? If so that would explain the musty smell.
  • I've just had a look and there are 2 untouched, which are on the exterior of the house (theres a foot or so between each side of the conservatory and the fence either side). However theres one inside the conservatory, which I'm pretty sure is partially covered :/
  • Aylesbury_Duck
    Aylesbury_Duck Posts: 15,421 Forumite
    Part of the Furniture 10,000 Posts Name Dropper
    I think thecyclingprogrammer has diagnosed the problem correctly. You've probably got a reduced airflow as a result of the blocked airbrick.
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