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Thanks lads, I have done some of it that way, then a work colleague thought his was installed against the blockwork, casting some doubt in my mind. All sorted know though. :)

Should edge insulation be bonded to the concrete block around the perimeter of the floor, or bonded to the DPM? (Just re-read that and it's not to clear what I am asking, In front of or behind the DPM is what I should of asked.) Thanks again..

After a bit of advice on test kit, young lad at work is just finished his time and unfortunately is not being kept on, after a whip round we have approx £200. His training was more industrial/marine but he is quite keen to get involved in the domestic side of life, more chance of employment...

Just started a self build myself, anyhow, Screwfix do an edge insulation strip that can be found here: edge insulation , they also have various foil tapes, if you do a search for foil on there site you will find some. Good luck

Just been reading that very post, I am in the throws of building my extension foundations and just following the plans so I'm afraid I cant comment regarding regs.

Thanks for that, out of curiosity what is the reason behind it being a lean mix?

Ok, so I have to fill my cavity :oops: with a lean mix concrete, anyone advise on how lean, and should it be wet or fairly dry?

Can anybody advise on the position of wall ties in a foundation wall that is 3 courses high and consists of a 100mm concrete block, 50mm cavity and a 140mm concrete block. Its for a foundation for an extension. Whilst I'm here conflicting reports what mortar mix to use some say 3:1 for...

Well I spoke to my supplier, suprisingly there is no min depth and it can even be surface mounted. Only spec was the ducting has to be Black in colour and they usualy spec 32mm in size.

The thought did go through my mind, new plan of thought now :idea: Think I will do away with the surface water pipe run that is sticking out of the ground and run new pipes around the perimeter of the extension, outside the foundations, for the surface water, it should make the new guttering...

I need to cross over an existing foul water pipe with a surface water pipe as per the pic. I think if I expose the pipes further back the surface water pipe may eventually clear the top of the foul pipe. Was thinking of using 2 30 degree bends to create an off-set. Will this still be...

Thanks all, will speak to supplier on Mon for confirmation.

About to pour foundation footings, and would like to install a duct for the mains cable for a meter move at a later date. Spoke to my supplier (Scottish Power) who said they would do a resin joint outside my property and pull in the longer cable to the new location. In my haste I forgot...

I've marked the sides of the trenches, thought I was being to fussy, glad I did it now., waiting for BCO to ok the footings before driving in the pins. Using 20mm rebar spaced at a meter apart, going to have to barrow the concrete in unfortunately, approx 4cu. Depth of concrete is 200mm...

Hoping to leave them in, unless you are about to tell me different :wink:

When setting the pins in a strip footing trench as a guide for the concrete level, is it normal to run them down the centre line of the footing, or zig-zag them either side of the centre line? Any advantageous/disadvantages? Thank you.

Thanks Tony and Corgiman, I should of googled before asking, :oops: but it's good to get confirmation. :lol:

Can anybody help, On my extension drawings I have abbreviations GT and RE on the drains, Re will be a rodding eye, but I am unsure if GT is for a gulley trap or a grease trap, both will have sink outlets entering them. Thanks Edit...Just been googling and I think it will be gulley...

Cheers for the reply, thought I was being to fussy, fitter/turner to trade so I need to throw that hat off when I get home at night. :P Main construction is 150mm timber frame clad in 100mm concrete blocks with "W" trusses for the roof, OSB sarking and concrete tiles.

Just had a go at laying out the footings etc on profile boards for an extension on my house, wondering how accurate I need to be? Darkness has stopped play for now, but I'm down to approx 8mm on the diagonals over a 14000mm span. Extension is 14000mmx5800mm. Footings are to be 700mm wide...