rendering,plywood.

[chrishallawell]

have bay to outside of house to render,chippy is at prescent fixing new plywood to top o bay window,customer requires it to be rendered.was looking at just metal lathe and render,sand and cement mix as on blockwork,not to sure if this is the way to go now,given wood needs to breath and such,
ideally looking at k-rend or such as she wants coloured finish,can anybody advise as to membranes and a suitable coloured render that is allowed on timber.cheers.

 

[freddiemercurystwin]

I have this issue at the moment, I'm about to put the drawings together for a rendered timber framed extension and need to render the timber frame without an external skin of blockwork so will need to stick the render toa timber background, I'm looking at using Rendalath. Its a membrane made up of a breather membrane, with an absorbent membrane (to suck the render on) and a mesh and then you can just stick a standard render on although trying to get hold of the rep is proving difficult so I'm not sure yet which maybe doesn't bode well. http://www.monocouche.co.uk/pdf/RENDALATH INSTALLATION GUIDE - July 2009.pdf

It seems to be a fairly economical solution for me although may be a bit pricey/OTT for just an ickle bay though.

Edited to say the rep was very helpful in fact and apparently, overall, this is cheaper than plywood + membrane + lathe + render.

 

[proview]

Expanding mesh, then two coats of render sand n cement or K render in many colour

 

[freddiemercurystwin]

Expanding mesh, then two coats of render sand n cement or K render in many colour

So what's to stop the plywood rotting over time then?

 

[stuart45]

Expanding mesh, then two coats of render sand n cement or K render in many colour

So what's to stop the plywood rotting over time then?

The Building paper he forgot to mention.

 

[freddiemercurystwin]

Oh right, the one that's been penetrated with all the fixings!

 

[proview]

Oh right, the one that's been penetrated with all the fixings!

You would use exterior ply, also treat it first

 

[freddiemercurystwin]

Bit of a risk I think, OK for a bay repair I suppose. A big no-no for new build though.