Hi All, I am currently renovating my house (first home) and what started as a bit of paint has somehow escalated...so, on the list of current jobs is central heating and radiators throughout. I've hung most of the radiators and chased down walls in three locations (for downstairs radiators), the radiators upstairs I am hoping to run pipes under the floorboards. On a side job I've removed the ceiling in the living room ("It's only a bit of paint, I'll be done in a week") which has given access to run pipework but also revealed a potential headache due to the location the end joist (very near the blockwork). The chase location is not within the 0.25 to 0.4 window of which I am allowed to drill through the joist (my hope was to drill in correct location and run pipework in the void between the last joist and blockwork, but this seems unlikely now). To the left of this chase is the conservatory door and to the right is an external wall. The location of the chase/radiator is preferred because this pipework will also go through to feed a radiator in the conservatory on the opposite side of the wall. I am hoping that you lovely people could offer some suggestions as to what the professionals (who I should have got in in the first place) would do in this situation with regards to routing the pipework? As a second and similar question, this joist also seems to be in the way for a radiator upstairs as the bottom of the pipe will come out in front of the radiator (get in the way/trip/not look very good). Short of adding big spacers to the radiator brackets, do you have any suggestions on the routing? Again, this location is not within the zone that I can drill or notch (very centre of the joist). Many thanks in advance. P.s. Merry Christmas and a Happy New Year!