Sound proofing a wooden garden room

Sound proofing a wooden garden room

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T5GRF

Original Poster:

1,972 posts

263 months

Wednesday 5th May 2021
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We’re having a garden room built from timber in a few weeks time - the usual home gym, family room type building. We would like to try to reduce any noise from the room when playing music or watching movies etc. The building will have insulation in the floor, roof and ceiling, is it worth considering any products that might both provide insulation and help to reduce sound?

Sporky

6,087 posts

63 months

Wednesday 5th May 2021
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Sheetblok line the walls?

Promised Land

4,699 posts

208 months

Wednesday 5th May 2021
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Over 25 years ago now we built a load of sound booths at Rolls Royce for milling machines to sit in while squealing away.

Basically 3 sided booths, with 2x2 uprights on the wall, rock wool insulation in between the studs, hessian stapled over it, then some sheets of steel with hundreds of holes pressed out onto the hessian, like peg boards but tiny holes almost touching each other, hence the noise goes in and gets trapped.

Ceiling was the same but joists replaced the 2x2.

Once finished they worked very well and not an egg box insight. wink

Something similar would be easy enough to build.

prand

5,910 posts

195 months

Wednesday 5th May 2021
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Have a look at this feller who builds a comprehensively soundproofed garden drum studio. There's others on Youtube from people who soundproof their garden rooms in various ways.

https://www.youtube.com/watch?v=4xj8cAxMYik

OMITN

2,095 posts

91 months

Wednesday 5th May 2021
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Also church out the recent video by Gosforth Handyman where he talks through soundproofing his outdoor room/studio/workshop.

https://youtu.be/4X3vGmQ04XE

Baldchap

7,507 posts

91 months

Wednesday 5th May 2021
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We did acoustic rockwool plus 50mm Celotex, then internal boarding plus plaster on one of our buildings. With the door closed it's silent outside. Added bonus is warmth.

T5GRF

Original Poster:

1,972 posts

263 months

Thursday 6th May 2021
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Thanks for the advice, much appreciated as ever

gareth h

3,503 posts

229 months

Thursday 6th May 2021
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For noise reduction you need dense material, most insulation will show density in the specification, rockwool do some good products, in addition use acoustic plasterboard and make sure doors and windows seal well, gaps are your enemy.

T5GRF

Original Poster:

1,972 posts

263 months

Thursday 6th May 2021
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The proposal is to install 75mm Rockwool along with multi foil insulation in the walls and then finish off with decorative MDF interior panels rather than plasterboard to avoid future cracking of the plastered finish.
The windows and doors are all aluminium double glazed units with integral aluminium blinds.

EggsBenedict

1,770 posts

173 months

Friday 7th May 2021
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prand said:
Have a look at this feller who builds a comprehensively soundproofed garden drum studio. There's others on Youtube from people who soundproof their garden rooms in various ways.

https://www.youtube.com/watch?v=4xj8cAxMYik
This is the soundproofing one: https://www.youtube.com/watch?v=OVs3dxrHkfo


prand

5,910 posts

195 months

Friday 7th May 2021
quotequote all
EggsBenedict said:
This is the soundproofing one: https://www.youtube.com/watch?v=OVs3dxrHkfo
I kind of thought he ruined the whole thing (having a floating, isolated walls & floor twin walls plus lots of other details by having a bloody great window at the front! He seemed happy with the end result though.

This guy built a huge heavy removable window box including cement board to completely block the sound going out the window.
https://www.youtube.com/watch?v=e6QNgTvvL6Q

My concern with complex soundproofing for garden rooms would be damp - and how you'd ensure that moisture wasn't gathering in the layers that you might be sealing up attempting to soundproof itn (this woudl cause problems with plaster inside, and rot any wood the moisture stays in contact with) - you'd need to make sure your breathable/ dampproof membranes and ventilation are in the right places to avoid this.

Edited by prand on Friday 7th May 09:33

Sporky

6,087 posts

63 months

Friday 7th May 2021
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T5GRF said:
The proposal is to install 75mm Rockwool along with multi foil insulation in the walls and then finish off with decorative MDF interior panels rather than plasterboard to avoid future cracking of the plastered finish.
The windows and doors are all aluminium double glazed units with integral aluminium blinds.
I think I'd want another layer of something with a different density if you're really concerned about noise.

dojo

741 posts

134 months

Friday 7th May 2021
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For soundproof you really want a room in a room in a room which decoupled from each other.