Block & beam ventilation with SIPS, and render board cladding

[Dmcturk]

Afternoon all,

I now have plans approved and engineering details, but trying to figure out how to use external renderboard and ventilate the block and beam floor below.

Architect has proposed a low level block plinth to facilitate the periscope vents, and then render boards above, but this will create a step in the wall.

any thoughts??

 Thanks 

[saveasteading]

Sketch please?

 

It sounds as if ventilation has been an afterthought.

 

When you say the plans have been approved, by whom?

[Dmcturk]

This is what has been designed, but want to know if I can do away with the brick/block plinth

[saveasteading]

I'm more concerned that beneath your floor is effectively a basement, ie below ground level and could fill with water. Even the floor slab is below ground level. 

Is there a reason for this?

[Benpointer]

Resurrecting this one.  We have the same challenge.  Architect felt the B&B floor could vent into the external 50mm vented cavity between the timber frame and the render boards but the BI says they must vent to 'fresh air'.

 

I was thinking something like Rytons Periscope vents https://rts.vents.co.uk/blog/product-details/rytons-periscope-underfloor-ventilator-pufv/ but they seem to assume an outer masonry skin, we will only have renderboard + a through colour render, say 30mm in total, so no room to fit an air brick.

 

Others must have encountered this issue before, any ideas?