This window looked okay from the outside but my ferry training taught me not to trust your eyes. The house was stinky and damp when we arrived the old owner had covered all the air vents with sticky tape and kept the windows and shutters shut the neighbour says she was an alcoholic as well but according to google that should not cause any damp. A bit of fresh air sunshine and treatment all is good now.
Are you wiring this house? The reason I ask is that sometimes its possible to pass cables in the hourdis (blocks between the poutrelles)as normally they are hollow.The base of the hourdis is around 1.5cms thick ,so to check if its hollow all the way across drill a hole at each end and push a rigid tube through.It can save you a load of time to cross from side to side.Don't cut the poutrelles.
You end up with lots of access holes though as you are lucky if you can fish the cable through multiple hourdis if they are terre cuite.
I have to cut poutrelles to create loft hatches, there is a precast componenent that can be cast in place across the trémie as would a noggin when cutting joists in a timber ceiling but I can't recall the name of it, do you have any experience of doing that job?
It's one that I want to get right first time, there may not be a second time
drill a hole at each end and push a rigid tube through
That would need to be a flexible rigid tube, I spent too many years of my life fishing cables through challenging voids, one of the best tools was the cheapest, lengths of the old type oval plastic conduit (not really the right word) used to protect (thats a laugh) T+E cables in chases in plastered walls, it was rigid in one plain but flexible in the other and lengths can be joined by hinges using oversized T+E wedged in and taped over.
I also used fibre glass & carbon fibre telescopic fishing poles as they could get pass through a ceiling tile and then be "shot" across a 4m void.
yes quite right.poor description on my part. The problem that can prevent passing cable can be where concrete has been poured full thickness of the floor because the width of the floor didn't work to the hourdis sizes.
Only ever done one,if I recall we chopped out the hourdis both sides of the poutrelle to be cut etayed a piece of contreplaque in place to support the floor.One side of the new openning was an existing poutrelle,the size of the opening was cut into the plaque,access will be difficult to start with,then cut out the poutrelle but smaller then the size of the hole,because you will need to use the steel in the poutrelle to interweave into the chevetre.Now you have access break out the concrete floor where the chevetre will go,so that the steel won't be higher then the existing floor.In the hourdis that is left in the floor fill the holes with paper, old cement bags otherwise you'll pour concrete forever,Shutter the size of opening that you want pour your concrete decoffre the next day leave the base of the coffrage in plce along with the etayment for 2to 4 weeks. Easier to do then write about it.I 've probably missed something but ask if somehing isn't clear.It's a dirty shitty job😃