Extending air bricks

[Dan77]

Hi
I am building an extension to the rear of my terraced house and need to extend the air bricks that ventilate the suspended floor(timber)through the new floor(solid concrete)
My question is Do they have to be extended straight through to the new rear wall or can they be extended to come out through the new side walls

 

[KenGMac]

Dan77, good evening.

I see this is your first post in here, welcome Dan, hope the answers you get here are of real value?

I have seen several rear facing extensions with both the scenarios you note, that is a pipe or similar taken fully front to rear of the new extensions concrete floor or simply taken to to one side or the other by the shortest route.

As I see it so long as there is not another "Structure" in close proximity to the side you propose venting the air brick from the new extension floor then there should be no problems.

By close proximity I mean a structure closer than about one meter, Any closer and the air flow could?? be compromised??

As an aside I have never come across wet or dry rot outbreaks in original property when the extension had the ventilation system you propose, no matter which type [Side, or rear wall]

Ken.

 

[tomfe]

hope the answers you get here are of real value?

LOL

 

[KenGMac]

Dan77, good evening again.

As can be seen from last poster, some of the replies are less than helpful.

Hey ho most posts are of value.

Ken.

 

[Dan77]

Thanks Ken,there are no structures either side so that's helpful

 

[noseall]

LOL

?

 

[KenGMac]

Dan77 good morning.

One other think you may want to consider?

How about placing a strip of mesh reinforcement over the embedded pipe? reason is that the inclusion of a pipe may? cause a plane of weakness along the length of the pipe, in the concrete, hopefully any mesh will assist in stopping or reducing cracking along the line of the embedded pipe?

It will not matter how much overlap you have over the pipe with the mesh suggest at least 300.mm each side.

Ken

 

[tomfe]

?

Exactly, the use of the question mark is what I laughed at too.

 

[Dan77]

Morning Ken,thanks for the advice,gonna mesh the whole slab anyway as I'm gonna support the back of the house off of it when I come to put the rsj's in
Dan

 

[John D v2.0]

You might want to consult an se about that if you haven't already. Raft would be more than just mesh
Edit: auto correct

 

[Dan77]

Sorry temporarily support off the slab with acro and strongboys whilst the steels go in