Quick Answer: How Does A Waffle Pod Slab Work?

Which slab is better waffle pod slab or raft slab?

Slab Heave – Waffle Slab vs Raft Slab Why.

Waffle slabs are built on top of the ground and need great drainage and really hard ground for the life of the building.

Raft slab footings are dug into the ground, have more perimeter stiffness and more tolerance to poor ground conditions than waffle slabs..

How thick is a waffle slab?

Waffle slab design Slab depth is typically 75 mm (3 in) to 130 mm (5 in) thick.

Should you put plastic under concrete?

Recently, though, research has shown that the old traditional layer of 6-mil Visqueen (polyethylene plastic) under the slab is seldom effective for two main reasons: Although it may seem water-tight, this grade of material allows a lot of water vapor to pass through.

Should you put Visqueen under concrete?

Water vapor will always move from a high relative humidity environment below the building into an area of low relative humidity – even through concrete. That’s why nearly every expert in the concrete industry recommends a below-slab vapor barrier to stop the vapor drive of water upward and into your building envelope.

How does a waffle slab work?

Waffle slabs are a reinforced concrete footing and slab system constructed on the ground. … Waffle slabs achieve their strength by varying the height of the slab above ground. The higher the slab above ground – the deeper the beams. The deeper the beams – the more stiffness the system has.

What is a waffle pod concrete slab?

SLABS. WHAT ARE WAFFLE PODS? This is where the concrete is sitting on (and around) a series of boxes (or Pods) set out in a grid pattern. Think of a waffle pod as a raft lying flat above your soil.

How much for a concrete slab for a shed?

At about $50/m2, the average cost of concrete slabs in Western Australia is the most affordable across the country. This is followed by the average price in Queensland and Victoria which is $60/m2. Concreters in New South Wales charge the highest for concrete slabs. Their rate is around $85/m2 on average.

What kind of foam goes under slab?

Two of the rigid foam insulations most commonly used below grade and under slabs are expanded polystyrene (EPS) and extruded polystyrene (XPS). Although both are closed cell insulations, they perform very differently over the long term.

Why do they put foam under concrete?

Concrete contractors learned that a layer of poly helps to keep a slab dry, because it stops upward vapor diffusion from the soil. … The foam layer isolates the room-temperature slab from the cold soil under the slab.

How thick should a concrete slab be?

4 inchesStandard concrete floor slab thickness in residential construction is 4 inches. Five to six inches is recommended if the concrete will receive occasional heavy loads, such as motor homes or garbage trucks. To prepare the base, cut the ground level to the proper depth to allow for the slab thickness.

How much does it cost to pour a 12×12 concrete slab?

The average cost to pour a 12×12 concrete slab that is 4” thick is between $888 and $1,584, with professional labor and materials included.

Are waffle pod slabs good?

They work perfectly well on non-reactive sites, slightly reactive clay sites and some moderately reactive clay sites. Waffle slabs are not recommended for use on highly reactive clay sites (Class H1 and H2) because the requirements for good drainage will be nearly impossible to achieve.

How much does a waffle pod slab cost?

On average, concrete slabs can cost anywhere from $75 to $110 per square metre. That’s still quite a spread, but it gives you a starting point for comparing quotes.

How long does a waffle slab take to dry?

approximately 7 daysDuring the slab construction process, the slab will take approximately 7 days to cure, so be patient – you are literally watching concrete dry during this week! Once the slab has had enough time to cure, the plumbing and drains will be connected onsite.

Is it cheaper to build on a slab or piers?

While a pier and beam foundation will rest on the stone located deep below your home, a concrete slab will rest directly on the ground. For that reason, concrete slabs are ideal for homes that are being built on flat lots. Concrete slabs can be constructed very easily and are cheaper than pier and beam foundations.