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Dear friends.
I need to soundproof my ceilings because of laminate flooring upstairs, unreasonable neighbours who don't want to know anything about it, and excitable young kids.
Hellish impact noise coming through.
The plan is :
•100mm acoustic rockwool slab between original joists.
•New C24 timber frame(63mm×97mm timber according to http://nhbccampaigns.co.uk/landingpages/techzone/previous_versions/2010/Part6/section4/appendix.htm for a dead load of 36kg/M2 bolted on the masonry load bearing walls and insulated for flanking noise.
•10-15 mm air gap
•100mm acoustic rockwool again between new frame joists.
•2 sheets of 15mm acoustic plasterboard with a 5kg/M2 viscoelastic or similar sandwich between the two sheets of plasterboard.
•tape and skim
I have some questions I hope you can help.
1.Should I go as far as building a new frame for decoupling (as all research showed decoupling is the "golden standard" of soundproofing) or should I use genie clips with resilient furring channel to save the built of a frame and save head height.
2.If I do build the frame is the timber sizing an overkill? I have not made it clear of these span tables are intended for floor joists meant to be walked on, in which case I can reduce the timber sizing and save room height.( Current setup will drop overall height floor to ceiling at 2300mm which I can live with)
•Is the best way to hang the new joist steel brackets, or make a box around the square of the room and cross-screw the joists to it?
Room size is about 2400mm×3200mm
I need to soundproof my ceilings because of laminate flooring upstairs, unreasonable neighbours who don't want to know anything about it, and excitable young kids.
Hellish impact noise coming through.
The plan is :
•100mm acoustic rockwool slab between original joists.
•New C24 timber frame(63mm×97mm timber according to http://nhbccampaigns.co.uk/landingpages/techzone/previous_versions/2010/Part6/section4/appendix.htm for a dead load of 36kg/M2 bolted on the masonry load bearing walls and insulated for flanking noise.
•10-15 mm air gap
•100mm acoustic rockwool again between new frame joists.
•2 sheets of 15mm acoustic plasterboard with a 5kg/M2 viscoelastic or similar sandwich between the two sheets of plasterboard.
•tape and skim
I have some questions I hope you can help.
1.Should I go as far as building a new frame for decoupling (as all research showed decoupling is the "golden standard" of soundproofing) or should I use genie clips with resilient furring channel to save the built of a frame and save head height.
2.If I do build the frame is the timber sizing an overkill? I have not made it clear of these span tables are intended for floor joists meant to be walked on, in which case I can reduce the timber sizing and save room height.( Current setup will drop overall height floor to ceiling at 2300mm which I can live with)
•Is the best way to hang the new joist steel brackets, or make a box around the square of the room and cross-screw the joists to it?
Room size is about 2400mm×3200mm