`toothed return' for door fixing?

[dent]

Hi all,

I am building an extension, and am pondering how to fix the door into the door opening. Its a 300mm cavity wall, with a 90mm deep door frame recessed by 50mm to match the doors on the rest of the house. A quick diagram is here:

manufacturers of the door say that I must put frame fixings through the thinnest part of the frame, but that would be too close to the inner edge of the blockwork to be sensible. I seem to recall coming across a photo of something I think was called a `toothed return'. Rather than putting a full height return off the leaf into the cavity, just a few blocks are returned where the frame is to be fixed:

this a sensible thing to do though? I can't remember where I saw the photo, and whether there were any things to beware of if doing it, so any advice or alternative suggestions would be welcome. It might not even be called a toothed return, which may be why I can't find anything about it again now.

thanks,

dan.

[Ash]

Hi Dan Can you check your emails ... I've emailed you direct Ash (Neil)

[Cash]

Ash,

Unless the conversation is private and off-topic, perhaps any reply relevant to the post would better be posted within the group rather than e-mail, so that others in a similar situation could also take advantage of how you managed to overcome the problem - it would also leave a 'history' that others could search for and avoid the re-writing of the answer many times.

Also, when replying to a post, it would be far easier to leave some of the original content in so that there is a 'flow' of easily read information so that the replies make sense - particularly if the thread is a long one - and that avoids having to 'jump' back-and-fore between posts to find out what is happening.

Sorry to be a little pedantic about this

Cash

[dent]

Neil kindly pointed out a problem with the URLs that I supplied, that I have now corrected. Nothing to do with the query that I was asking about.

regards,

dan.

[Andy Dingley]

This is nature's way of giving you an excuse to buy one of those Arbortech saws...

[mark]

Could you build the frame in as you go? Then you could use these:

end goes into the frame,and the other end is sandwiched into a mortar joint. No unsightly screw holes on the visible faces of the frame.

mark

[ct]

Thanks, Mark. I hadn't come across those before, and that looks like an easy solution.

dan.