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Hi All The builders are back tomorrow so I need an urgent answer to a question if you could please... We've brought the build out the ground on foundation blocks. As I want a space under the floor, ive put DPM around the outside of the blocks to stop and damp coming through into the voide...

I'm told they don't do it any more?.. I've just called the local area office and they are now another company.. nothing to do with Aggrogate industries?...

My house was built about 20 years ago using split faced buff re-constituted stone.. 3 size.. 140 / 100 / 65 high and lots of dofferant lengths (max about 440).... I'm told its Rebastone by Bradsone... does thios sound right?... I need to match it for my new extension... I know I'll not get...

Hi All.. We are putting in foundation blocks 5 high to bring the build out of the ground. on one of the legs, they only did 4 high last week befor ethey called it a day.. on Saturday, they laid the 5th block and some concrete commons 3 high on top on the inside. On Sunday, my Dad came to help...

I’m told by building control that Methane gas barrier is designed to stop Methane passing through it. On a molecular level, Methane is small in comparison to Water, Radon, CO2 etc.. so even membranes that hold water will not stop Methane?.... The barrier is made from virgin HDPE to give a...

I have a special clause on my plan application approval, that says the barrier under my concrete oversite has to cope with Methane?... this is due to us being within 150 meters of some old land fill I guess.... Having contacted building control, they say its yellow in colour with ali foil in...

LOL.. my Dad did the exact same thing about 3 years ago when he was bricking up a garden wall FFS !!!.. How.. just stand back and take a look!... mind you, he was 85 then... :)

Yes.. thanks for that.... makes it all very understandable!... It's this weekends job :) Its plastic pipe BTW... cheers!!

I have to join into a soil pipe that runs down the side of my house with an inspection chamber so I can 'T' into it.. the question is, the existing pipe is about 1.5 meters deep.. how do you get the pipe into the new base unit?.. Can you get them with connections that push down the pipe and...

When the concrete company was asked about the mix they use for strip foundation in quite solid stone / clay trench they said they would use a 20 mix... I'm assuming this is a C20... is it strong enough?...

OK.. I know you'll think I'm barking :lol: but i dug a 6'' wide by 6-8'' deep trench at the side of the cast (at least 2-3'' into the clay... cleaned and brushed up all the concrete.. and cast a new piece onto it... I know, I know... its 1/2 a day I didn't need to do and £15 in materials I...

that's the problem..' no seall ':lol: ... and it rusts... expends.. cracks up the base.... wall... and I have to take it all down . I can't sleep knowing what he's done!!!.... :wink: seriously... will have a re-look this weekend 8)

LOL. Do nothing. ?

Paint it ! So you think it does need attention ? Paint it with what as it would need to last many years ? POR15 is very good ? Although it will be quite a rough side cast if exposed.

I've just looked down the hole and the clay does not start until further down.. so if the rebar is stuck out its onto a softer clay / sand area... so will get water going past it at it will sink and hit the clay level and stop... probably right where the rebar is... great !!

so it all depends on the interface between the concrete and the clay... and at 2'' deep from the top of the cast (worst case).. it should have found its way to be tight against it... let's hope so... sounds like clay is my best option for keeping it oxygen free anyway.... it looks like...

so keep it wet and it wont rust?.... Mmmm if i put a metal bar in my pond it rusts .... are you saying there is no Oxygen in water below ground??... The problem is that the ends 'could' be sticking out the sides of the concrete... :)

but if its 10mm?.. or even no cover??.. what happens and how long? :roll:

Thanks for your replies... TBH that's what I was thinking... even worst case if it all cracked up into 8'' square blocks, where would it go?.. so the structure above ground should show no signs of anything below.. I'll mention it to the builder as there may be some kind of foundation block he...

Won't it rust over time and crack the concrete? And enable water to get into the footing. Not sure how long it takes to rust out but have seen the result of rebar cracking on old concrete structures? Or is it seriously nothing even to think about? Cheers