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Cast Iron Air Brick FAQ's

What is the purpose of an air brick?

  • They are used in homes or properties with suspended floors or wall cavities and help air to circulate within these spaces.
  • This ventilation process helps to protect floors and walls from contact with cold, damp air.
  • Without the addition of the vents your floor or wooden beams may be exposed to moisture and the risk of rotting.


Do I need air them?

  • Properties with hollow floors or wall cavities will require them to aid ventilation and prevent condensation within the empty space.


How are they maintained?

  • Over time they can become blocked with leaves and debris. It important to check the ventilation holes remain open to ensure they function properly.
  • Our iron designs can also be painted annually with a purpose metal paint, to help maintain the finish.


How do I install them?

We aways recommend a qualified trades person is consulted if you are at all unsure as to how to install or replace your existing vents.
They are generally fitted just above ground level to provide maximum room or cavity ventilation, if your existing vents or planned installation is below this, you may need to use a custom telescopic vent.


General installation guide:

Commonly speaking there should be an air brick approximately every 1.8m if you are using the standard 9x3 size. Before proceeding we always recommend your individual circumstances are assessed by an industry professional.

  • Remove the section of the wall big enough to accommodate the new vent brick. Again this should be done only by those experienced enough to do so or by a qualified builder.
  • Secure the piece in the vacant gap once a base of mortar has been applied along all edges of the cavity.
  • Pack the surround of the brick with cardboard, slate or wooden wedges to secure the hold.
  • Tap the packing in being careful to avoid hitting the vent itself.
  • When pointing up or applying the external mortar be careful not to obstruct the ventilation holes which might inhibit the performance.
  • Use a pencil or similar to clear the excess; this also should be done a few days later to remove the now set mortar from impinging on the grill area.
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