Two soundproofing quotes

slhqoue

Hi there,

We have two quotes for a soundproofed independent stud wall in front of our attic bedroom party wall to prevent talking and some impact noise from our neighbours. I have copied them below. Do they seem that different? The price is substantially different, mainly I think because one is from a specialist insulation company and the other a joiner/builder. Which would you go for and why? Do you think one deserves to cost substantially more than the other? Will reveal prices after some replies but I don't want to affect the replies!

Option One

Airborne performance of approx. 65dB* average to the treated area subject to initial noise levels

Using metal frame build an independent wall and mass fill with 50mm/60kg high density acoustic mineral wool. Layer with 15mm acoustic sound block board

Layer with acoustic 10kg/SY100 Tecsound barrier mat

Additional Layer of 15mm acoustic sound block board.

All points of contact to be acoustically sealed.

Walls to a plastered finish

Standard soft wood joinery to be reinstated or replaced if standard stock item.

Removal of our treatment waste

Option Two

Gyplyner IWL Wall lining System

• Lay carpet protector

• Pull carpet back

• Take off the existing length of skirting board 

• Apply backing coat plaster to where the skirting board has been removed 

• Erect IWL Gyplyner metal stud wall 20-40mm in front of the existing party wall (Decoupling)

• Fix 50mm High density self adhesive isolation strip to the back edge of the abutments

• Fix RWA45 Acoustic mineral wool 50mm 

• Fix the first layer of 15mm sound bloc Acoustic plasterboard leaving a 5mm gap around the perimeter

• 5mm gap to be filled with AC95 Acoustic sealant  

• Fix Tecsound SY100 or Equivalent

• Fix the second layer of 15mm sound bloc Acoustic plasterboard leaving a 5mm gap around the perimeter (staggered joints to first layer)

• 5mm gap to be filled with AC95 Acoustic sealant  

• Tape plaster board joints with fibre tape 

• Apply skimming coat troweled to a smooth finish (2 coat work)

• Fix skirting board back 

Price includes 

• Labour 

• Materials 

• Wastes disposal

consumers_revenge

Option one sounds the professional one?

It looks very similar to the materials used for mine. Wht I was told or had was basically each bit of the next applied layer was blocking a different frequency. Ask about MLV too assuming thats not the SY100 Tecsound barrier

95% quieter now :-:smile:

slhqoue

Thanks. Do they look that different to you? One is £1700 the other £2700!

FFHillbilly

both seem to be quoting to the exact same spec, "SY100 matting", 100 metal stud with 50mm of acoustic insulation and a 15mm SB board,  skimmed.
with the exception that quote one has added an extra layer of 15mm SB board
quote 2 sounds better to me. they have specified a lot more details which tbf the quote one may do anyway but you never know.
looking at the price do think one extra layer of plasterboards is worth £1000? those boards are about £20 each

consumers_revenge

7x2.5m stud wall, 75cm sound deadoning material, low frequency soundboard, MLV, High frequency soundboard, plaster and make good cam to £3500 for me for comparison and fully worth it.

slhqoue

FFHillbilly said:

both seem to be quoting to the exact same spec, "SY100 matting", 100 metal stud with 50mm of acoustic insulation and a 15mm SB board,  skimmed.
with the exception that quote one has added an extra layer of 15mm SB board
quote 2 sounds better to me. they have specified a lot more details which tbf the quote one may do anyway but you never know.
looking at the price do think one extra layer of plasterboards is worth £1000? those boards are about £20 each

I think they both include two layers of 15mm SB board - have a look again. So yes, I think they look the same too!

consumers_revenge said:

7x2.5m stud wall, 75cm sound deadoning material, low frequency soundboard, MLV, High frequency soundboard, plaster and make good cam to £3500 for me for comparison and fully worth it.

To be fair your wall might have been much larger?

FFHillbilly

slhqoue said:

I think they both include two layers of 15mm SB board - have a look again. So yes, I think they look the same too!

so they do, well in that case I'd go with quote 2

slhqoue

Does anyone else have an opinion on this?