Your question: How do I extend my RCC roof?

How do I extend an old RCC slab?

Now for extending, design the slab and try to make a good bond between existing and new slab. For a good bond, shatter some portion of concrete from the outer boundary. You can make good bond of steel by interlocking the old and new bars, and the irregular face provides good bond with old and new concrete.

How do you extend a concrete roof slab?

Rebarring method: How to extend an existing RCC slab?

  1. Drilling Machine for drilling hole in to the old slab.
  2. Rebarring chemical.
  3. Steel Rod of required diameter( in this case of slab use 8mm/10mm)
  4. Blower to clean the dirt from the hole.


Can you extend concrete slab?

The easiest way to do this is to cover the extension with plastic. After approximately 48 hours, the wood forms may be removed. Then simply wait an extra couple of days and the slab will be strong enough to be subjected to stress, and you can enjoy a long-lasting extension to your patio.

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How do you join two concrete roofs?

New RCC slab can be joined with the existing one as in the following steps.

  1. Chip off the existing slab up to a certain depth (preferably 15 cm)
  2. Drill reinforcement bars into the existing slab.
  3. Apply a bonding agent so as to act as a bonding agent for new and old concrete.
  4. With the support of formwork cast the new slab.


How do I add a new concrete slab to an existing slab?

If done properly, new concrete can often be poured right over an existing slab. For this to be feasible, the contractor needs to pour at least 2 inches thick, use smaller aggregate, and incorporate reinforcement such as welded wire mesh or fiber mixed into the concrete.

Does concrete stick to old concrete?

Fact: Fresh wet concrete does not normally bond well to existing dry concrete. … Concrete would have gotten an F. There is nothing in basic portland cement that will act as a bonding agent. Portland cement concrete works well in mass and provides great compressive strength but not bond.

How do you extend a concrete column?

The procedure of adding reinforced concrete columns is by marking out all the points to add columns. The walls and roofs are supported using props and bracing. The columns should be place at all building corners and any load bearing walls intersections. The wall is cut carefully up to the beam level.

How do you extend an existing balcony?

Reclaim Balcony Space & Increase Indoor Area Without Building…

  1. Install outdoor blinds. …
  2. Consider motorised blinds. …
  3. Opt for sliding or folding doors. …
  4. Have inside-outside flooring. …
  5. Extend the seating. …
  6. Add an awning.
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How do you cantilever a slab?

Slab loading

  1. Slab loading.
  2. Ultimate load = 1.35gk+1.5qk = 1.35×4.375+1.5×4 = 11.91 kN/mm2. Bending moment.
  3. n = 11.91 kN/mm2. Bending moment.
  4. Reinforcement.
  5. k’>kCompression reinforcement is not required.
  6. Provide T10 @ 200mm C/C (As pro. = 393mm2/m.
  7. Check for deflection (same method as two way slab)
  8. Deflection check is ok.

How much does a 15×15 concrete patio cost?

Cost to Install Concrete Patio by Size

Size in Feet Square Footage Price Range
12×14 168 $1,400 – $4,000
15×15 225 $1,800 – $5,500
16×18 288 $2,300 – $7,200
20×20 400 $3,000 – $10,000

How can I make my concrete slab look better?

Take a look at all of these fabulous concrete patio ideas.

  1. Paint a Pattern. Yes, you can paint your concrete slab. …
  2. Lay Decking Flooring. Did you know you can lay decking over a concrete slab? …
  3. Add Curves With Pavers. …
  4. Lay Slate Tiles. …
  5. Stain the Concrete to Look Like Tile. …
  6. Add a Beautiful Outdoor Rug. …
  7. Paint Concrete. …
  8. Dress it Up.


Are concrete roofs expensive?

The average installation price for a concrete tile roof costs anywhere between $20,000 to $40,000 depending on a few factors such as the size of your home. You can expect to pay $3 to $5 per square foot or $300 to $500 per square installed. Costs will vary depending on average local prices in your area.

What is the best bonding agent for concrete?

This guide will help you choose the best concrete bonding agent for your project.

  • BEST OVERALL: Quikrete 1 Gal. …
  • BEST BANG FOR THE BUCK: Quikrete 1 Qt. …
  • BEST FOR CONCRETE BLOCKS: Liquid Nails – LN-905 Landscape Block Adhesive.
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How thick does a concrete overlay have to be?

The minimum recommended thickness is 1 to 2 in. (25 to 50 mm) for a fully bonded concrete overlay placed on a base slab that is practically free of cracks and in which the concrete is sound, clean, and of good quality.

Roofs and roofing