Create opening through cavity wall

[williamglossop]

I am weighing up the prospect of creating an opening into my garage from my house. The garage is integral but there isn't presently a way through directly from the house.... I have to go out the front door of the house and in via the main garage door.

Typical 1970s brick built house - no cavity insulation.

Suspended timber floor inside house.

I'm thinking of using two concrete lintels - but not sure if I need to prop it while I fit them. Only looking to create a typical door way size opening and will fit a high security door.

I'm ok with how to do the work.... but not sure if I'll need to prop it and if building control need telling.

 

[23vc]

Wouldn’t necessarily need to prop it but might be a cavity tray issue further up depending how exposed/state of outer leaf

 

[williamglossop]

It's not exposed.... the wall is the central wall in the house.... its not (and never has been) an external wall.... so I don't think they'll be any trays above it anywhere.

It's a fully internal wall.

 

[23vc]

Fully internal cavity wall’s a bit unusual?

 

[williamglossop]

It's the wall that seperates the garage from the house. It's brick on the garage side, and hollow blocks on the inner leaf..... plastered obviously.

 

[23vc]

Ok, I assumed house was 2 storey and garage single. For that size opening I wouldn’t prop, just be careful with the triangular section that’d end up unsupported. And get one leaf lintel in and packed before doing other.