Hi all Can i use king span between ceiling and bedroom floors,and do i need to leave an air gap.
insulation
- Thread starter thespecialone
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Yes. No.
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Are both rooms heated? If so then there's no point, you might as well put a stack of fivers in the void at least you can spend them later.
L
Leofric
You don't need thermal insulation in bedroom floors ,it requires sound insulating quilt.
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You do if they are above a garage.
L
Leofric
Yes, obviously. I assumed they meant 'ordinary' bedroom floors.
Use Rockwool RW3 - this is a good sound insulator and has good thermal properies too. As to the question on whether you actually need to thermally insulate I would say yes - this gives you greater control over temperatures in each room - ie you are not heating the room above etc
L
Leofric
Are you suggesting you should install additional thermal insulation to the Rockwool ,which as you say has thermal insulating properties anyway, perhaps make every room an insulated box
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To be honest the insulation specified on external walls is where the temperature difference could be 25 degrees plus. Between rooms in a house you'd only want a few degrees otherwise you're going to get terrible condensation and mould.
L
Leofric
If you have 100mm insulation quilt in the first floor (apart from over a garage !) as required under bldg. regs for sound insulation, that should be fine in my opinion . Having said that 15mm Soundbloc board ceiling as well will give even better sound insulation.
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Getting 15mm sound block board up on the ceiling might be the challenge though! I used some normal thickness sound block for a wall and that was hard enough.
Our extension ceiling was double boarded instead with the joints in different places and that is probably as good in the end.
Our extension ceiling was double boarded instead with the joints in different places and that is probably as good in the end.
L
Leofric
Specified often for housebuilders and never heard any complaints about fixing it but not disputing your experience.
Are you suggesting you should install additional thermal insulation to the Rockwool ,which as you say has thermal insulating properties anyway, perhaps make every room an insulated box
No, just 100mm Rockwool RW3
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Probably is if you're experienced, i was thinking from a DIY point of view. However having said that this thread has digressed a bit since the op disappeared!
L
Leofric
Maybe he has got his hands full managing Spurs now !
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