Mat during Roof concrete

[jult]

Basically it is shortcut method to roughen the concrete surface for bonding( But it is smoothen). the other shortcut is to avoid cement slurry leakage and undulation in shuttering sheet it is hided to nacked eyes. So use ms sheet good sheet. nowadays there is bonding agent which gives technically good result without shortcuts

[ardesarchitects]

Hi Moni
Wooden centering is no more available ,very very few maintain them to use in odd size,shapes slabs.
Plastic cover below the mat is like lubricant just in case the rcc slurry settle between centering sheet and mat.

Regards
Ar.Praveen.N
Ardes Architects and Interior Designers
ardesarchitects@gmail.com
www.ardesarchitects.com

[mumah]

Hi,
I also did the mat finish and found it is worth of putting mat before concreting. I bought the mat from Hosur (near bus stop) and that cost me some thing around Rs 1.5 per SQFT. About laying, I didnt paid any money for that as the barbender/Centering person itself did this without any issue.

Mukesh

[sholla]

Recently we had used mat for the roof concreting. After removing the centring
plates we are noticing that the mats are sticking to the underside slab like they
are fused into the slab. Is it always like this ? My contractor is saying that removing
will be a tough job.

[m3_07]

I bought the mat from Hosur (near bus stop) and that cost me some thing around Rs 1.5 per SQFT. About laying, I didnt paid any money for that as the barbender/Centering person itself did this without any issue.
Mukesh

Excellent find...& one more input....if you are expected to buy the coir ropes @ plastering stage, TN again is THE place, where it costs less.

Recently we had used mat for the roof concreting. After removing the centring plates we are noticing that the mats are sticking to the underside slab like they are fused into the slab. Is it always like this ? My contractor is saying that removing
will be a tough job.

well...what to say, if you hadn't used the mat, the contractor would have happily charged you the extra buck for chipping the concrete, as plain surfaces do not hold the plaster easily. Infact the whole contractor community are the scums of the highest order. They speak what suits them. How to remove the mat??
1. Use a spare 8mm/ 10mm rod of 7 feet length. ask the bar bender to sharpen the edge & also make a small curvature at the edge. Stick it into the mat & pull it down. It works. I did the same thing.
2. If it is not so easy, Spray water over the mat. Allow it to soak for 30 mins. Use step 1 to remove it.
3. If step 2 doesn't work, they spray kerosene over the mat & burn it down - Never had this situation !!

[sam_m400]

Where in TN ?. Is it Hosur you are talking about as above somebody stated they bought at cheaper price.
Can you share the person details if you have one ? . did any person can bring that to me if i call ?

[amarbs]

@m3_07, you have rightly said. "removing will be tough" sounds like a lame excuse. My contractor is doing this without any issues.

[JollyRogers]

I purchased Centering mat from Hosur. 5 bundles costed me Rs. 1700. (About Rs.1.1 per sq.ft).

[keerthi.blr]

Guys, Just go to Srinivas nagar where you get these mats and plastic sheets. There are plenty of shops there.
Pay some worker 100/- and get it layed. Laying this is not rocket science. So anyone can do it (with your supervision)

All this will just cost Rs. 1.25 per sft for very good quality mats + plastic sheets.
I have done this and saved 50% of mat cost.

Purpose: Plastic sheet is to ensure that cement doesnt spoil the centering boards.
Mats ensure that it roughens the bottom of concrete which helps in holding plastering cement.

[maheshvivid2003]

hi keerthi can u pm me the details i stay near to srinivas nagar