My folks recently installed sheets of insulation from left over cool room panels underneath thier wooden floor stumped house. Will ask them if they noticed an improvement. The also experience wide swing in temp with roos, wasps and snakes. Not the high winds however. On 22 Feb 2018 11:14, "James Cameron" wrote: G'day, I'm living in a corrugated steel shed, and it's too hot in summer and too cold in winter. Walls are double clad zinc plated steel, with a polyester wool insulation around steel framing. Roof is steel plated polystyrene insulated panels, 100mm thick. Windows and doors are aluminium framed single glazed. Heat pumps have worked well to moderate, but the IR probes and bare feet show the heat is mostly leaking through the floor; with four hour lag, apparently normal for the 100mm thickness. The floor is bare concrete, about 200 sq m. One room has carpet. The concrete was poured onto 0.42 to 0.48mm mean-thickness steel roofing [1], which rests on 125mm x 75mm steel bearers, separated by about 2.2m. Bearers are welded to steel posts of 75mm x 75mm x 1.2m each resting on a 1 sq m concrete foundation block. A photograph underneath is available on request; just don't want it archived. Will reply by private mail. Unimpeded airflow under the shed, which is 1.2m off the ground. The air exchanges heat with the zinc plated steel under the concrete. The profile of the steel has long troughs that act like heat sink fins. We're thinking of adding insulation underneath. We have a product in mind [2]. Environmental risks are; high speed wind (~60km/h), leaping male kangaroos (about one a year), birds looking for nesting material, and a wasp for every size hole. Obligatory PIClist data; we have DS18B20 sensors in several rooms, with one for the concrete and one buired 500mm into the ground underneath the shed. Data collected once a minute by PIC 12C509, ESP8266, and ATmega328. Listening for your thoughts. ;-) References: 1. KLIP-LOK CLASSIC 700, page 9 of http://www.lysaght.com/sites/default/files/LysaghtRoofingWallingInstallat ionManualJul2015.pdf 2. PIRMAX HR Panel 100mm, polyisocyanurate with al foil facing, https://reflexinsulation.com.au/products/pirmax-hr-panel/ http://reflexinsulation.com.au/wp-content/uploads/Reflex- PIRMAX-HR-PANEL-Technical-Brochure.pdf -- James Cameron http://quozl.netrek.org/ -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .