I wonder if anyone can help me.
First of all, I intend to engage a CORGI engineer to do the work but I am trying to save a little time and head scratching first.
I have what seems to be a common problem in that I am trying to run a gas extension from and understairs cupboard to the kitchen at the other side of the house. The floors are concrete and running around the outside of the house is impractical.
I have identified a possible route, which is to follow the C/H boiler feed pipes into the floor void of the bedroom above. These pipes run out of the U/S cupboard and have been boxed into the corner in the adjacent room. This boxing I assume would be classed as a duct but is less than 100 x 100mm so assume is ok.
Once in the floor void, the gas pipe would then follow the floor joists in the room above, with no need for any notching. They would run through the bedroom floor, into the bathroom and then down into the kitchen. Bedroom floor is nailed chipboard (I dont think it is glued) covered with laminate flooring and the house around 30 years old.
I have read many of the questions and answers on this forum about this issue but am still unsure if what I want to do would meet the regs. In the bathroom, the pipe will run underneath the bath. If need be, I can leave the floor open here or fit a ventilation grid to evacuate anything that may be trapped. Any views/advice on this?
As an alternative, there was a copper gas pipe installed when the house was built and this is buried in the concrete floor. It has never been used and I assume that no-one will touch it wit a barge pole? Or could this be pressure tested to check it's integrity?
Hope someone can help with this.