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Blocking up a back door
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Mistress Rose



Joined: 21 Jul 2011
Posts: 11129

PostPosted: Sat Nov 17, 18 8:35 am    Post subject:  Reply with quote    

We used to use washing up liquid as plasticiser. Worked quite well.

sgt.colon



Joined: 27 Jul 2009
Posts: 6548
Location: Just south of north.
PostPosted: Mon Nov 19, 18 10:21 am    Post subject: Reply with quote    

I've heard that before MR but I'd bought the plasticiser before I knew.

DPack, this is what is above the back door but I'm going to ask our builder if I can safely remove it without support as really I'd like to have nothing there because I'm anal like that.



Ty Gwyn



Joined: 22 Sep 2010
Posts: 4290
Location: Lampeter
PostPosted: Mon Nov 19, 18 10:56 am    Post subject: Reply with quote    

I was never any good at physics in school,but the only weight that porch lintel is holding up is the triangle above it,all other weight is spread to eitherside,think of the arch system or the Parthenon.


Personally I`d leave the inside lintel in till last.

dpack



Joined: 02 Jul 2005
Posts: 35907
Location: yes
PostPosted: Mon Nov 19, 18 11:23 am    Post subject: Reply with quote    

the current lintel thing is cracked and pokes out so will catch rain etc. removing it would be best.

there might be an internal structural lintel as well ,if so build up to it.

ask your builder for on site advice as to whether you need a strong boy just to be sure nowt will move while you work. until you expose both sides and can see the construction method it is not possible to be more specific

Ty Gwyn



Joined: 22 Sep 2010
Posts: 4290
Location: Lampeter
PostPosted: Mon Nov 19, 18 11:26 am    Post subject: Reply with quote    

There is bound to be an internal structural lintel,its cavity work.

sgt.colon



Joined: 27 Jul 2009
Posts: 6548
Location: Just south of north.
PostPosted: Mon Nov 19, 18 11:36 am    Post subject: Reply with quote    

Thank you both. I'll ask the advice of the builder but building up to it and leave it until last sounds like a sound piece of advice.

dpack



Joined: 02 Jul 2005
Posts: 35907
Location: yes
PostPosted: Mon Nov 19, 18 1:02 pm    Post subject: Reply with quote    

Ty Gwyn wrote:
There is bound to be an internal structural lintel,its cavity work.


there should be ..., fixed it

make sure there actually is one, i have come across all manner of "unorthodox" things in buildings *

re the cracked thing you definitely want that out

* a recent gem was doorway cut through gable end wall for an extension, 2 thin rfc lintels with one end in to 9" brickwork the other end on the turboblock internal wall of the extension which used the original 9" garden wall as an outer skin.
ie 30 tons sitting on biscuits.

* a more historical one involved a fair bit of papier mache, plaster and holes as a structural feature

Ty Gwyn



Joined: 22 Sep 2010
Posts: 4290
Location: Lampeter
PostPosted: Mon Nov 19, 18 2:09 pm    Post subject: Reply with quote    

In building alterations,especially the DIY type,all kind of things are found,


But looking at the photo of the back door,that has not been altered since it was built,50`s/60`s at a guess?


All the lintels in this house are wood,the internal one in the living room is near on 7ft in span,but its curved.

sgt.colon



Joined: 27 Jul 2009
Posts: 6548
Location: Just south of north.
PostPosted: Mon Nov 19, 18 3:25 pm    Post subject: Reply with quote    

The house is from the 30's and I guess it hasn't been changed since then.

dpack



Joined: 02 Jul 2005
Posts: 35907
Location: yes
PostPosted: Mon Nov 19, 18 3:48 pm    Post subject: Reply with quote    

pop a bit of plaster off and have a look

chances are a 30's house might have a timber lintel internally, it may be in good condition ( work up to it ) or considering that crack it might be a bit damp ( deal with what you find )

it might be the one we can see goes all the way through ( a bit unusual )

it might be a small rfc lintel for the inside skin

it might be the door frame supports the internal skin

Ty Gwyn



Joined: 22 Sep 2010
Posts: 4290
Location: Lampeter
PostPosted: Mon Nov 19, 18 4:03 pm    Post subject: Reply with quote    

Maybe it`s my eyes but the photo looks like cement mortar,has it been re-pointed ?as the norm for that period was lime mortar,in South Wales anyway,incorporating waste from steel works,hence black mortar.

And I agree ,possibly be a wooden lintel on inside skin for that period.
But I doubt very muck the lintel seen goes right through bridging the cavity.


I presume when you mentioned you had already got the bricks,that they are corresponding sizes,as the bricks then were thicker and wider.

dpack



Joined: 02 Jul 2005
Posts: 35907
Location: yes
PostPosted: Mon Nov 19, 18 7:39 pm    Post subject: Reply with quote    

size does matter, at least when it comes to bricks and ice creams

sgt.colon



Joined: 27 Jul 2009
Posts: 6548
Location: Just south of north.
PostPosted: Tue Nov 20, 18 11:33 am    Post subject: Reply with quote    

Thanks guys.

TY, as far as I know it's not been re-pointed but I don't know that for sure. Apparently there is coal dust mixed in with the mortar, according to the guy that I bought the bricks off. The bricks are the correct size as I checked them when I took out all the half bricks running up the side of the door.

I had a chat to the builder this morning and he's going to lend me a couple of strongboys and the props to put them on. He then told me the best way to remove that concrete bit over the door oh and that also I need to get wall starters for the inside of the back door. He's a pretty great guy.

dpack



Joined: 02 Jul 2005
Posts: 35907
Location: yes
PostPosted: Tue Nov 20, 18 12:23 pm    Post subject: Reply with quote    


Ty Gwyn



Joined: 22 Sep 2010
Posts: 4290
Location: Lampeter
PostPosted: Tue Nov 20, 18 12:37 pm    Post subject: Reply with quote    

Wall Starters?does he mean profiles instead of cutting out the cavity reveal,the reveals need cutting out or otherwise your creating a damp problem.

Strongboys?does he mean acrow props?

Its the old black mortar you have then.

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