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Everything posted by JonBATConsult
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Professionals around Cambridge area
JonBATConsult replied to JayC's topic in New House & Self Build Design
Sounds like something is off. Lets talk more -
Standard rockwool pipe lagging works quite well. Upgrade this to a mass loaded vinyl around the lagging
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How bad is this cock-up ?
JonBATConsult replied to pstunt's topic in Mechanical Ventilation with Heat Recovery (MVHR)
That really is a right old Cock up isnt it. Without figures I cant help you but normally. I would not expect to see more than 8l/s being force down a 75mm duct. One problem is you will end up with a large oressure drop on your grille and it will regenerate noise.. Reducing your your fan duty below what has been advised is not reccomended and woudnt comply with part F. If you have go to the effor of sealing up its important to follow through with the correct MVHR setup. (15 years working in building acoustics and air permeability) -
Suspended ground floor booming noise
JonBATConsult replied to mickespite's topic in Floor Structures
A little bit more context needed. Is this new to you, age of property etc? -
Opinions on best way to drop a ceiling
JonBATConsult replied to Thorfun's topic in General Construction Issues
Yeah i often find if you go and talk to your local you can get a price that is good. Maybe not with travis perkins though -
Creaky floors: alternatives to rock wool?
JonBATConsult replied to Garald's topic in Sound Insulation
If its a creaky floor you have then to prevent this all the floor amd orginal deck has to come up. The joists should be checked for being flat and not moving. I see too many dodgy conversions where ceiling joists have become the structural floor. Once checked, joista shimmed if needed, lay mineral or glass wool between the joists (its an irritant, just wear a dust mask). Use expanding polyurethane glue to put down a new chipboard floor. Use the glue between the board and joist and you will have a very quiet low creak floor. -
Ecodan 11.2kw PUZ-WM112VA-BS - Noise Levels
JonBATConsult replied to Kevin77's topic in Air Source Heat Pumps (ASHP)
Pictures will help -
Ecodan 11.2kw PUZ-WM112VA-BS - Noise Levels
JonBATConsult replied to Kevin77's topic in Air Source Heat Pumps (ASHP)
Hi if your phone is fairly new there are some decent sould lever meter apps that are pretty decent. Carefully measure the unit at a distance of 1m and let me know what you get. -
Opinions on best way to drop a ceiling
JonBATConsult replied to Thorfun's topic in General Construction Issues
The weight of the frame is negligable in this scenario. Make sure you plasterboard and system achieves your fire requirements. Make sure speakers have a fire rating so they dont compromise the ceiling. -
Opinions on best way to drop a ceiling
JonBATConsult replied to Thorfun's topic in General Construction Issues
https://www.walls-and-ceilings.co.uk/metal/britishgypsum1.html?_=1684877947009&p=2 Great prices for the metalwork on here. -
Opinions on best way to drop a ceiling
JonBATConsult replied to Thorfun's topic in General Construction Issues
Thats a decent gang -
Opinions on best way to drop a ceiling
JonBATConsult replied to Thorfun's topic in General Construction Issues
What he said. A decent gang could install, tape and joint it all in a day it the lights a terminated in advance. Resilient hangers, bit of 25mm insulation in the void will improve sound insulation by a significant amount. -
Surely just use 215 wide block or blocks laid flat single blocks or hollows or discuss windframes. Im sure he is doing this for a very valid reason but important to have a bit of back and forth in design development with se
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3 x 3 hr sessions results in about 3 hrs of actual work. Each time its 1 hrs of faffing, finding tools, swear, thinking and then 1 hr of packing and cleaning up.
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Is this a new build or refurb? I've been working in Building acoustics and air permeability design and testing for 15yrs so youve got the right person. I see what you are trying to do BUT if something happened, fire etc and the board delaminated all parties would wipe their hands clean of you. I would recommend buying a purpose made board, i looked into doing this on my own diy project but I found buying a standard board ended up being better. To maximise the thermal improvement i strongly reccomend sealing the blockwork prior to installing the insulation. Makes a huge difference in Airtightness. This can be done using a really thin render or pargecoat (even roller it on).. I did this on my own house before insulating and I have a permeability of below 2m3/hr.m2 which is fantastic!
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MVHR loft install help
JonBATConsult replied to richo106's topic in Mechanical Ventilation with Heat Recovery (MVHR)
Hi, happy to give you a little bit of a guide. What unit are you using?