Cladding inside wall with Ytong 50mm - Lintels?!

[Mrdjc]

Just looking at this as an option, existing walls are rather pants, mortar/rubble built, and very cold (Despite being insulated from the outside)

I want a nice new (breathable!) inside finish, and attempting to straighten out the existing walls without half the render falling off by mistake will be a nightmare.

Rather than dot'n'dab which I hate, I am looking at taking down the existing render and building up a new internal wall in front of the old walls, but the question is this:

In order to span above the windows/doors etc I will require lintels, the lintels only come in 125,150, 250, 300 and 375mm wide.

I won't be able to cut into the existing wall as the windows already have lintels above them.

So how do you get around this, make a temporary shuttering with rebar inside it and cast it in situ out of concrete?

Wouldn't this create a huge cold bridge (Especially since its above windows and doors)?

Alternatively I could take a non-reinforced 150mm beam and cut it in three lengthwise but I doubt this would like the extra 1-2 courses above it resting on there.

Any suggestions are welcome.

 

[jeds]

Why do you need lintels? If your existing lintels are functional then whatever you add is just cosmetic.

 

[Mrdjc]

Because the block work would be built up around the windows/doorframes, and would require to continue above the window/doorframe

But there is nothing to rest the block work on above the window/doorframe, and the last time I checked thin air doesn't support very well.

I need a lintel to span from one side of the block work to the other side above the window/doorframe, so I can continue the block work course above it.

 

[noseall]

the lintels only come in 125,150, 250, 300 and 375mm wide.

Eh?

Are you saying that you are building a 100mm thick wall and that you can't get hold 100mm wide lintels?

 

[cotswoldbuilders]

You dont want to build the wall tight to existing, leave a 25mm gap, that will allow for the 125mm lintol on a 100mm wall.

 

[Mrdjc]

The block work is only 50mm wide. (as per title)

Yes, the lintels only come in the above mentioned widths.

http://www.ytong.sk/sk/docs/ytong-cennik-2011-01.pdf

Page 15, 16 (Preklad = Lintel) Both reinforced and unreinforced for load bearing (nosny) and non load bearing (Nenosny)

Blockwork is end of page 14.

*edit*

Looks like they just Glue the stuff on! (Multipor, not AAC)
http://www.youtube.com/watch?v=1HabsQ6Rf0Q