concrete slab work

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  1. Hi. Please help. I am building a single story garage. One engineer says Mashwire reference 100 is fine. Another says it has to be 193. Cost is naturally an issue. What is correct?

  2. I am building a single story garage. One engineer says that Mashwire reference 100 is fine. Another says it has to be Reference 193. Naturally cost is a factor. Which is correct?

  3. What you need to do is screed the concrete with a plaster mix to ensure that it is smooth.

  4. Hi there.

    Please help. I am planning on laying a concrete slab in my garden. 3×2.5m by 50 mm thick. I will be putting my potable pool on there which has 3000lts of water. It also needs to be very smooth. How much cement and material would I need? I’ve heard if I mix plaster mix it will be smooth..

    Thanks for help in advance

  5. H Kobus, I would suggest that you use a decking system where concrete lintols are laid across the span of the floor area and then hollow blocks are placed between the lintols. This is then topped with a layer of concrete. The result, in my experience, is a much cheaper (overall cost) and lightweight, sounproof and better insulated. There are many suppliers of this type of system, you can google or yellow pages for a company. BTW. we have put together an affordable “Concrete & Mortar Handbook” that might answer any of your questions please have a look here

  6. kobus burger says:

    hi wish to build a 2nd story on top of my current 3 garages to use a flat. I want to cast a concrete slab but not sure how to compensate for expansion on the slab? i am afraid that the expanding slab could cause cracks later on? any advise please?

  7. Yes any concrete slab that will be used as a living area as part of the house must have a dampproof course beneath to prevent rising damp.

  8. Hi Matt, the hoop iron is inserted into the wet concrete/cement and then allowed to dry. You might want to bend the hoop iron 90º before you place the concrete/cement so that it is fixed fast in the foundation and will not slip straight out if it was just left flat. You will not need nails if you do this.

  9. Hi,

    In step 5 should I nail the hoop Iron into the brick retaining walls on the inside?

  10. We are busy converting our roofed patio into a closed dining room. We need to lay a concrete slab between the kitchen door and the patio which is already tiled, about 1m space where there used to be decorative river stones (just with normal earth under). Do we need to lay PVC down before pouring the concrete?

  11. Hi,
    Someone needs to do an inspection for you and recommend a solution. I am sorry but we do not do site inspections nor do we recommend products or contractors. Contact a specialist waterproofing company in your area and ask them to have a look.

  12. so what can I do to eliminate this floor water problem,cause I need to
    put a wood floor tiles.please help me…