Problems in the UK, HELP!!!!

[Rubensgt40]

Hi Bugs

This probably won't help you much- I think the hood test in the UK is to a different standard to the USA's F2420 (and now also in Oz)- but F2420 is totally useless where there are any surface coverings, curing compounds or densifiers etc. F2420 calls for those to be removed prior to testing. IMO any screed which is dense enough to slow down the drying time would, under the spirit of the standard, equate to those types of coverings. So, to answer your question, yeah, if you're sure you can find a "clear spot" then drill, baby, drill! A surface test would tell you nothing.

The next problem is, if you find high RH at depth, with those screeds on, its going to take a while before its dry.

We allow the hood test in Oz where there are in-slab heating pipes or similar, but would much rather do in-situ probes. How good are your thermal imaging guns and what kind are they ?