Patio step and air bricks

[Maatz123]

Hi,

I'm going to build small step on my patio, width of the red lines in photo. This however ill be blocking 1 and a half air bricks, highlighted in green.

I plan to use an air brick channel and extend the one that is being blocked fully to the front of the step, either using a plastic air brick cut out in sandstone facia or drilling holes in the sandstone facia to provide airflow.

Question is, do I have to worry about the air brick that is being blocked by half, do I go through the effort of extending this to the front of the step also or just leave it being blocked halfway?

 

[Wayners]

Move air bricks to either side of the step?

 

[Maatz123]

Move air bricks to either side of the step?

Impossible to move air bricks, its an extension with concrete floor, these air bricks have already been extended from original house boundary

 

[Jurassicspark]

Impossible to move air bricks, its an extension with concrete floor,

Does the room behind the extension have a suspended floor?

 

[Maatz123]

Does the room behind the extension have a suspended floor?

Yep, house has suspended floor, extension concrete floor with 4 (I think from memory) air brick channels essentially extended the original air brick/air flow.

 

[jj4091]

Could you build your step wider to cover both vents then use 4 of these and some pipe to carry the vents through to the front of you new step and some new airbricks. https://www.ukbuildsupplies.com/tel...MI5-amqZzpigMVNI9QBh0s8SdCEAQYFCABEgL56fD_BwE

 

[foxhole]

Looks like patio may breach dpm, do you have damp problems?