Author Topic: How do I make good this wall?  (Read 2219 times)

LittleWheelsandBig

  • Whimsy Rider
Re: How do I make good this wall?
« Reply #25 on: March 15, 2020, 10:54:06 pm »
Not even close to a problem then, even with a couple of burly blokes to move it.
Wheel meet again, don't know where, don't know when...

Re: How do I make good this wall?
« Reply #26 on: March 16, 2020, 09:59:00 am »
No expert on those repairs (although it looks bad to me and replacing with galvanised steel sounds good to me).

I agree that tanalised decking is a slippery death trap. Nothing wrong with using those boards though, but put yacht non-slip decking on top. Hard wearing, non-slip and cleanable.
<i>Marmite slave</i>

Mrs Pingu

  • Who ate all the pies? Me
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Re: How do I make good this wall?
« Reply #27 on: March 16, 2020, 05:06:55 pm »
So galvanised steel round the edges and support and GRP 'floor' if you like?
Do not clench. It only makes it worse.

LittleWheelsandBig

  • Whimsy Rider
Re: How do I make good this wall?
« Reply #28 on: March 16, 2020, 05:10:02 pm »
Sounds reasonable, assuming no complicating factors.
Wheel meet again, don't know where, don't know when...

Mrs Pingu

  • Who ate all the pies? Me
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Re: How do I make good this wall?
« Reply #29 on: March 16, 2020, 05:29:07 pm »
Next stupid question. Can I just get a fabricator & builder to do that or do I need to get an architect involved?
Do not clench. It only makes it worse.

LittleWheelsandBig

  • Whimsy Rider
Re: How do I make good this wall?
« Reply #30 on: March 16, 2020, 05:31:09 pm »
I only do large scale stuff, mostly overseas, and I have no idea how things work in this country with regards to domestic work.
Wheel meet again, don't know where, don't know when...

Aunt Maud

  • Le Flâneur.
Re: How do I make good this wall?
« Reply #31 on: March 16, 2020, 09:06:59 pm »
You may need the building regs bloke.

Gattopardo

  • Lord of the sith
  • Overseaing the building of the death star
Re: How do I make good this wall?
« Reply #32 on: March 16, 2020, 09:58:05 pm »
I'd wait to dry out the wall as I am wary of trapping moisture in the wall, especially with render on the outside and plaster on the inside.

With regards to the flat entrance, what does the lease say who owns it and liable for costs.

Mrs Pingu

  • Who ate all the pies? Me
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Re: How do I make good this wall?
« Reply #33 on: March 16, 2020, 10:13:29 pm »
The mortar is just on an outhouse, there is no plaster inside it. The flats are owned, we don't do leasehold in Scotland.
Do not clench. It only makes it worse.

andytheflyer

  • Andytheex-flyer.....
Re: How do I make good this wall?
« Reply #34 on: March 17, 2020, 08:24:57 am »
Next stupid question. Can I just get a fabricator & builder to do that or do I need to get an architect involved?
Undoubtedly the Building Regs will apply, so you need someone to design the steelwork who knows the Regs.  I'd talk to Building Control in your local authority and they will know an appropriate person, or a small company to do the steelwork and who can get the Regs sorted at the same time.  Try to keep the design, construction and erection in one company, or with someone who will co-ordinate the lot, otherwise you end up with "a he said - she said" approach.

Re: How do I make good this wall?
« Reply #35 on: March 17, 2020, 09:39:50 am »
I'd wait to dry out the wall as I am wary of trapping moisture in the wall, especially with render on the outside and plaster on the inside.
"dry out"; you do realise that this is in Aberdeen, right?
<i>Marmite slave</i>

Re: How do I make good this wall?
« Reply #36 on: March 17, 2020, 06:35:40 pm »

"dry out"; you do realise that this is in Aberdeen, right?
[/quote]

Which may be grey  but is dry realtive to the rest of Scotland.

ian

  • feat. Undead Jess & Finestre, Queen of Hell
Re: How do I make good this wall?
« Reply #37 on: March 17, 2020, 07:14:27 pm »
That's like saying it's dry relative to the ocean.
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Mrs Pingu

  • Who ate all the pies? Me
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Re: How do I make good this wall?
« Reply #38 on: March 17, 2020, 08:54:42 pm »
Just realised the surveyor I had round from the company I linked to upthread said he was going on holiday to Barcelona last week.
God knows how long it'll be before I hear from him then...
Do not clench. It only makes it worse.

LittleWheelsandBig

  • Whimsy Rider
Re: How do I make good this wall?
« Reply #39 on: March 17, 2020, 09:50:38 pm »
Damp substrate is good for placing cementitious material (concrete, mortar). Technically ‘saturated surface dry’ prevents too much water being sucked out of the repair material into a too dry substrate. Water is needed to hydrate cement to become full strength concrete/ mortar over several days. Flowing water is bad news though, particularly very early on.
Wheel meet again, don't know where, don't know when...

Re: How do I make good this wall?
« Reply #40 on: March 17, 2020, 10:22:22 pm »
Looking at the balcony pic, the steel cantilever support beam beneath the slab(RSC ?) is also quite corroded - assume it is somehow 'built in' and the extent of the corrosion would need to be determined.
The slab distress at the front edge - has the waterproofing around the baluster bars broken down letting water in and corroding the rebar - as has been noted repairs are some times possible. If only the front  portion is damaged a structural repair may well be possible but would need to be carried out by specialists with experience of this type of work and the waterproofing membrane repaired/replaced.
There also looks to be cracking of render on the right of the pic ?

As you noted the balcony is the only entrance to two flats, any replacement  is likely to require to be of fire rated construction  - best discuss with Building control - Scottish Regs are often different to us down South !

Gattopardo

  • Lord of the sith
  • Overseaing the building of the death star
Re: How do I make good this wall?
« Reply #41 on: March 18, 2020, 10:06:46 am »
The mortar is just on an outhouse, there is no plaster inside it. The flats are owned, we don't do leasehold in Scotland.

Yeah the infamous freehold flats.

Gattopardo

  • Lord of the sith
  • Overseaing the building of the death star
Re: How do I make good this wall?
« Reply #42 on: March 18, 2020, 11:05:47 am »
I wouldn't bother waiting for it to dry out, cement will take better to a damp surface.

As above, prise out all the loose stuff with an old screwdriver (or better still a thin masonry chisel)  and then repoint with may be a 4:1* soft sand / cement. (add a drop of washing up liquid to the mix, it will make it more workable)

*those bricks look quite soft so may be a weaker mix ?

By the looks of the wall you won't make it look any worse, and you may give it another decade before a proper job needs done.

Yup. Wet is better. Rake out junk and start again with a 6:1 mix. Plug chisel and mortar pick useful. For such a small area an SDS might do more damage. You can also chock the bricks up with slithers of slate slipped in between the mortar.

I have a mortar gun available for free if anyone could use it. (bought thinking it would make pointing easier, ended up using a float and a trowel, as ever)

Anther vote for float+ trowel instead of mortar gun; even easier to get the mortar well into deep joints is a float + a bamboo chopstick, then finish off with the trowel.

Finger trowel + plasterers hawk + mortar + beer (I like lime mortar as you know, but you have cement mortar)

(mortar = 1 part cement:5 parts sand + a bit of water)


Put the mortar on the hawk then stuff it in the hole with the finger trowel................................. then drink beer.

It really is that simple.

So, we can't even agree on a mortar mix nor can we agree on how to rake the mortar. 

Mortar guns are brilliant but you have to know the proper prep and be careful with the sand, (fine sieve) and the mix is better mixed with a paddle. It really is a time saver.  Mortar rake on an angle grinder, I made dust attachment that is great at keeping the dust and mess down and controls how deeply you rake.

Am interested about the idea of wetting an area before in this damp climate, saying that i have never done any repairs in sunny/warm weather where the mortar is in danger of drying out too quickly.  It has been to avoid trapping moisture.


Gattopardo

  • Lord of the sith
  • Overseaing the building of the death star
Re: How do I make good this wall?
« Reply #43 on: March 18, 2020, 11:26:51 am »
Yeah I'm sure I can manage that wee bit of mortar. It's this that's worrying me:
2020-03-15_10-38-07 by The Pingus, on Flickr

Glad you're enjoying your course  :thumbsup:

I agree with LittleWheelsandBig - When I have been involved in reinforced concrete repair (either as the project manager or surveyor for either party)  I have always recommended getting specialist surveyor in to a report with any and all exposure (hacking at bits to be sure what work is needed and extent of work needed to rectify the problem)  Also insurance against anything going wrong so we can pass the buck.