air bricks

[vibetime]

my house has two air bricks which will be under the suspended floor of my new conservatory, can i just put air bricks in the new cony wall to allow airflow or do i need to duct the house ones outside and add new ones just for the cony suspended floor ?
thanks

 

[^woody^]

You need air flow under both floors and not just air vents

Really, you should put at least two more 150x215 vents into to the existing house walls near the bottom corners there the conservatory walls meet the house wall - this will prevent stagnant air staying in the corners

 

[vibetime]

hi, my house does have 3 more down the side and two at the front, my post prob want to clear .
so if i let the two vent under the cony suspended floor and add two or three air bricks into the new cony wall would that do ?

 

[freddiemercurystwin]

Scroll down to the photos old bean!

//www.diynot.com/forums/viewtopic.php?t=171482

 

[vibetime]

thanks for the link, but my conservatory floor is suspended timber not concrete so that will need venting to, question is do i need to vent the exsting house air bricks to the new external wall, like in the link photos , then add more airbricks to vent just the new cony floor ? or can the house ones vent into the cony floor which will have two air bricks in the new external wall
thanks

 

[freddiemercurystwin]

Oh yea, just read your first post properly, as woody said.

 

[vibetime]

would what i propose not work ?

 

[freddiemercurystwin]

Maybe, ^woody^ is proposing you fit a new air brick into the house wall each side of the conservatory and then two or three each side of your conservatory, I concur. The remedial cost of not doing adequate ventilation is multiple times greater than the relatively small cost of installing two additional air bricks now. The Forum is littered with threads from Posters with rotten joists due to poor ventilation.

 

[ChapiTheBricky]

if your new conservatory is blocking your existing air bricks yes, just install new ones to match the existing, as long as there is a flow of air under your floor you're fine.

 

[^woody^]

Walls under suspended floors are "honeycombed" and not solid, so as to allow air to pass throughout the void unimpeded

When you add your conservatory, despite adding vents to the external wall and leaving the existing ones on the house in place, you are not venting the floor void adequately - the solid house wall is stopping air flow.

You will find that cold moist air will linger in the corners of the conservatory void, and air flow to the underfloor of the main house is reduced

So to compensate, you need to increase the air vents to the main house beneath the conservatory