Large sound-proofed garden rooms

This image shows a comprehensively soundproofed music practice room, with cedar cladding applied to the eaves with a cedar soffit with integral lighting. See below for the construction process.

Sound-proofed garden room construction

Taken from the progress photograph page for the customer of this soundproofed music practice room, just under 30 sq metres footprint, which is the maximum footprint area allowed without planning permission. Completed March 09. Planning information.

Outer walls beginning assembly and roof panels being constructed, you can see here and below this text, the rubber cushioning strips, they reduce acoustic coupling by making all surfaces more resilient, this starts the sound dampening process.

Warren trusses over the door openings, on both inner and outer walls are needed as the weight of the double roof /ceilings will be substantial, too heavy to slide on a slippery surface like the windows shutters in Luton, so we will be providing rolling gear this time.

The warren trusses will be clad in boarding for extra strength and soundproofing, indeed all the inside surface of the outer walls will be further clad by soundbloc boards but not till on site as too heavy to transport this size. The front and rear walls split into 3 and the gables into two in order to fit on a lorry

The first lot of rockwool acoustic insulation has now been fitted to all exterior walls, two more thicknesses for the walls yet, in between in the gap and then inside the inner walls, will show photos when we get that far.

Below, soundproof shutters being manufactured.

This is about as much as we could do in the workshop for this studio, apart from staining of the doors, the cedar cladding for large split panels is fitted on site, (so as not to require cloaking strips over the panel joints), plus when soundproofing, gaps are never a good thing. After all this, we take it all apart and load it for transportation to the customer, then we lay the foundation and start re-assembly shortly after, as below. Perhaps you will see why it was 35K plus Vat.

On site installation

Left shows foundation after piling with extra support joists joining the piles so as to reduce the span of the joists in the floor so as to make the step into the building as low as possible, after that the floor deck is laid and the outer walls start going up.

You can see the inner acoustic sliding door shutters on the floor above and left, there are two pairs of them, made to mimic the walls themselves, both inner and outer walls, so that there are no weak links caused by openings, the building is sealed against sound leakage in all directions with layer upon layer, everything done twice for max effect. Right photo above you can see the addition of rockwool acoustic insulation, this is present in both inner and outer walls and the gap in between them which is what you see here.

On the right of the right hand photo the first inner stud wall panel is near to being fixed. It already has a double skin of soundbloc with sheet rubber as a sandwich, it will then be filled with rockwool and further lined and plaster skimmed as below.

All Extra Rooms buildings, soundproofed or not, are properly plastered and finished off as a normal room in your home.