NewStats: 3,265,376 , 8,186,562 topics. Date: Saturday, 14 June 2025 at 05:21 PM 44594c

No

Wait for 21 days

South4sure1:
Good morning engineers in the building.

Please I want to ask a question. Is it possible to start roofing immediately after casting the parapet?

Just 24hours gap.

Ratio of mixture of concrete will determines how long u will wait but definitely not 24hrs.A real engineer can never tell you that

Bahamas95:
Just imagine the question someone is asking.

Later they'll start blaming village people when things go wrong.......Only Chinese technology can make that possible.

It's like asking if one can start knacking their wife 30 minutes after vaginal birth

South4sure1:


You think it’s a show ?

I asked to confirm something and your calling it show ?

Well I’m not here for any show. I only did my findings because engineer was saying I can start the roofing the next day after casting. Which wasn’t comfortable with me.

That’s why I came here to ask. Well gotten my answers.

If you feel it’s a show then so be it.

Why are you even asking this question? Should common sense not tell you the answer? People who clearly have no knowledge of building construction are building their houses themselves, and people wonder why houses fall left right and center in nigeria

South4sure1:


Am not rushing. Engineer was saying I can start the roofing next day after casting. That’s why I want to be sure because I know the parapets hasn’t set for load

For efficiency and effectiveness don't mind the engineer. Allow it set and cure before you do the roofing.

Engineer needs money..

😂 😂 😂 😂 😂 No na, he's running to Gaza......You better give it some time, at least a week or two......that's damn too fast. Definitely, you can be doing some other things to while away the time but don't do that roofing until two to three weeks after atleast....

brain54:
Where are you rushing to...


Russia?

descartes400:


It's like asking if one can start knacking their wife 30 minutes after vaginal birth

Don't mind him.

South4sure1:
Am not rushing. Engineer was saying I can start the roofing next day after casting. That’s why I want to be sure because I know the parapets hasn’t set for load

Parapet doesn't carry any load, so it can't set for load and your roof load entirely transferred to the roof beam (if introduced) or walls.

Parapet is just for aesthetic purposes

If house collapse nw, dem go say na village people cause am....not even 3days gap, why 24hrs.....well, na u build the house so if d house collapse, money dey ur pocket to build anoda 1 na

Pls wait a bit more to avoid story.

atobs4real:
For safety purpose, please, calm down. Don't rush in and later rush out.
Wait for like 2 weeks or a month then continue. Those engineers are after what to earn
The more they wait, they sometimes been idle

Not entirely true.

Why the rush?

Bahamas95:
Just imagine the question someone is asking.

Later they'll start blaming village people when things go wrong.......Only Chinese technology can make that possible.

Knowledge has gone way past this level of reasoning.
Google plasticisers and rapid hardeners.

BTW, you can still continue roofing as hardening of concrete begins at least 8hrs after the pouring but creeps till 3days and then to 7 and 14. However, because the exterior parapet is a formwork in itself, it is ok to continue works.
Even with all these, I would wait for at least 3days just for surface hardening

South4sure1:
Good morning engineers in the building.

Please I want to ask a question. Is it possible to start roofing immediately after casting the parapet?

Just 24hours gap.

Why the rush? U want to use the house for burial ceremony or what? U better give it a week before roofing

When the money is too much... Yes you can. Incase anything happens, engineer and workers go still chop. 4-5days is okay

Of course, you can start roof carcassing and covering. Just ensure that the props and to the concrete eaves(parapets) are still firmly in position. And also perform and ensure processes of concrete curing

One day? A big "No"

Leave it for 1 week, if within the one week period, rain falls on it, then it's better.
Congratulations 👍

Yes, very possible

bomsilaga:


Knowledge has gone way past this level of reasoning.
Google plasticisers and rapid hardeners.

BTW, you can still continue roofing as hardening of concrete begins at least 8hrs after the pouring but creeps till 3days and then to 7 and 14. However, because the exterior parapet is a formwork in itself, it is ok to continue works.
Even with all these, I would wait for at least 3days just for surface hardening

Professor Wole Soyinka no need for you to wait, roof immediately.

Cmeo:

For efficiency and effectiveness don't mind the engineer. Allow it set and cure before you do the roofing.

Which efficiency and effectiveness are you talking about?

Is parapet part of structural ?

arcahmad:
Yes, but dont remove the formwork.


Let me handle your block decking professionally to save you some cost and achieve maximum strength

Dude, how can block decking hold as firm as traditional poured concrete ones?

Is the block one cheaper?

I know of wood type.

It depends.. if it is precast parapet, it is not advisable.. once it is formwork , the wood and the prop is still bearing the loads. You can definitely start the roof in that gap ... parapet is not load bearing membrane.. yes your engineer is right..

Does he plan to live there for just 3days?

Or what's the haste all about?

Breaker001:
One day? A big "No"

Leave it for 1 week, if within the one week period, rain falls on it, then it's better.
Congratulations 👍

Are you a professional Engineer?

It is not advisable considering the strength of the parapet at that moment.because it has not been fully set.

No. Allow the concrete to cure.

VicM6:
If house collapse nw, dem go say na village people cause am....not even 3days gap, why 24hrs.....well, na u build the house so if d house collapse, money dey ur pocket to build anoda 1 na

Building collapse because the roof work will continue after 24hrs

You people will just be saying things you have limited knowledge about.

If the building will collapse it will be either the beams, columns or footings failed.

Parapet isn't a load bearing structural .

And they all assumed parapet can only be cast with concrete!

Concrete takes approximately 3 weeks to strengthen up, but some cut and nail engiwill tell you it's not a problem.


Tell him to wait but if he's in a rush he should give it at least 2 weeks

1 week

Why the rush in the first place?

No, you need to allow the parapet to cast properly.

It's like giving a load to baby to carry in the infancy.
It doesn't always end well bro.