- Joined
- 4 Jun 2016
- Messages
- 47
- Reaction score
- 1
- Country
Hello forumites,
I am renovating my home and have started lifting some of the chipboard floorboards in the first floor. My plan is to insulate with 25mm boards between the joists, and then install underfloor heating on top of the insulation which will require another 25mm. I am also considering removing the ceiling downstairs and instead put new 9mm ceiling boards in between the joists so that I expose the joists partially in the groud floor living area. The joists are 16cm in height so the insulation, UFH, and between-joists ceiling arrangement will leave around 100mm of joists exposed.
My concerns:
- I was thinking of installing 38mm x 38mm battens on the side of the joists in order to screw the ceiling boards form underneath. Would this suffice or do I need something more?
- The existing joists have some herringbone struts in between them but they seem all over the place right now with some missing and others with only the half part in place. I assume these serve some sort of structural support, but could I remove or replace them with straight noggings? Any other suggestions that will allow me to expose the joists "neatly" rather than with noggings and struts visible?
- The joists where they rest on the wall, have this darkened colour (as per photo). What is this? I measured the moisture with a meter and comes up the same across all areas at around 6-8% which I believe is normal.
- Since the joists are exposed like that, should I be looking to do something to "protect" them, mainly from damp, or anything else I could to insulate and make this more airtight? Finally, how are the joists supposed to be ventilated since there are no airbricks?
Many thanks in advance!
I am renovating my home and have started lifting some of the chipboard floorboards in the first floor. My plan is to insulate with 25mm boards between the joists, and then install underfloor heating on top of the insulation which will require another 25mm. I am also considering removing the ceiling downstairs and instead put new 9mm ceiling boards in between the joists so that I expose the joists partially in the groud floor living area. The joists are 16cm in height so the insulation, UFH, and between-joists ceiling arrangement will leave around 100mm of joists exposed.
My concerns:
- I was thinking of installing 38mm x 38mm battens on the side of the joists in order to screw the ceiling boards form underneath. Would this suffice or do I need something more?
- The existing joists have some herringbone struts in between them but they seem all over the place right now with some missing and others with only the half part in place. I assume these serve some sort of structural support, but could I remove or replace them with straight noggings? Any other suggestions that will allow me to expose the joists "neatly" rather than with noggings and struts visible?
- The joists where they rest on the wall, have this darkened colour (as per photo). What is this? I measured the moisture with a meter and comes up the same across all areas at around 6-8% which I believe is normal.
- Since the joists are exposed like that, should I be looking to do something to "protect" them, mainly from damp, or anything else I could to insulate and make this more airtight? Finally, how are the joists supposed to be ventilated since there are no airbricks?
Many thanks in advance!