Browse Forums Heating, Cooling & Insulation Re: Under-slab insulation - yes or no? 9Feb 23, 2009 8:46 pm Yak_Chat recent studies have indicated that up to 75mm of the earth under the slab warms up with the slab in OZ - - therfore this section of earth = greater mass to your slab. I'd agree that some slab edge insulation is of use. http://www.yourhome.gov.au/technical/fs512.html Depends on what the mass is being used for. If it is for releasing stored heat, previous research has shown that increasing mass thickness beyond 6 inches doesn't yield much discernible benefit. However, there may be value in high mass to buffer excess heat. The EERE site confirms that slab-edge insulation is the most cost-effective means to reduce significant heat loss if you intend to pursue this strategy. 4 6231 To me, that's what it looks like: poor backfilling and/or compaction. The width is about 1000mm maybe. That conduit in the photo is for the NBN. The water is about… 4 9506 Thanks for your advice. So far i have not noticed any issues with doors and windows. Builder advised they will organise drainers to inspect 2 weeks ago but no further… 7 27058 |