Which Skin to fit door to?

C

cb9002

Hi

I live in a 50's terrace and am considering replacing a rotting rebated wooden external back door and frame with PVC (possibly a low-threshold version). At the moment, the existing frame is fitted in the cavity between the two (brick) skins, but most PVC doors I've seen are fitted to the external skin.

Please could you suggest what will probably be closing the cavity (if anything) and whether it will be suitable for fixing the new PVC frame to? If not, what are the best ways of fixing and closing the cavity?

Thanks!
 
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The door should be fitted to the outer skin.
Then you can either make good inside by using pvc trims or plasterboard and skim.
In my opinion a plaster finish is much better looking.
You might want to squirt some expanding foam in the cavity first though to stop any draughts.
 
C

cb9002

Thanks. Out of curiosity, if (as I think you imply) the cavity isn't otherwise closed, how's the current frame fitted to it?
 
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You will need a cavity closers.

Should've been put in when built unless they didn't do it in the 50's or it maybe an extra door put in(?)

Another method is a dpc behind the outer skin with a return brickwork

An example, many difference type out there,

images


7_cavity_closer.gif
 

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