Browse Forums Building A New House 1 Apr 26, 2010 9:35 pm We have a Waffle Slab included in the build for a house we are looking at with Allworth Homes. I have read that the Waffle Slab is suitable for highly (h) reactive soil types, and is the preferred slab type for reactive soil types over other slabs. However, Allworth are stating that the 'h' type Waffle Slab will be extra as the 'standard' Waffle Slab is only suitable up to 'm' type soil types. If there a difference between 'm' and 'h' Waffle Slabs for these 2 soil reactive types? Thanks... Re: Waffle Slab for 'h' soil type - if there a difference? 2Apr 27, 2010 12:04 am Hi, Not sure where you are building but all the H class slabs near us need piering. The piering is what increases the cost. Min Building at The Ponds Land reg 3/12/09, Land settled 18/12/09 Approved by Design Panel 16/11/09, Submitted to council 24/11/09, Approved by Council 21/1/10 Site Start 21/5/10 http://andyminpondsbuild.blogspot.com/ https://forum.homeone.com.au/viewtopic.php?f=31&t=19800 Re: Waffle Slab for 'h' soil type - if there a difference? 4Apr 28, 2010 7:26 am Piering is actually a separate thing to the slab type. Ours was upgraded from M to H due to our problem soil (highly reactive clay, plus a substantial amount of fill), which added a few thousand onto our site costs. H-class means you have a thicker slab - I don't know the technical details, but I'm sure there are online resources that explain it all. The bonus was that because of the slab upgrade, we got our porch and al fresco room concreted, instead of them just having strip footings. As a completely separate thing, the rear of our slab was also piered, but that had nothing to do with soil type and everything to do with proximity to the sewer. Another few thousand.... There are quite a few threads on the subject; these are just a couple: http://forum.homeone.com.au/viewtopic.php?f=1&t=21282 http://forum.homeone.com.au/viewtopic.php?p=14698 The Soil classification has little to do with piers. The purpose of the classing of the soil is to identify the clay content and the "average expected range of movement… 2 9859 Natural stone tiles like slate, travertine, and limestone add a timeless, elegant look to… 0 25019 2 4189 |