sound deadening material ..

[mikestef]

Hi Harrymann,you have helped me with this recently as well,but I still havent taken the plunge and decided a course of action!Could I ask you what you did?or what you believe to be "the way"Thanks in advance ,Stefany

[slobbo]

I left about 200mm at the bottom of every panel so that I could keep an eye on any moisture issues. I didn't put anything on top of the foam and I didn't seal the interior panel with plastic sheet. I did consider it but instead covered the interior hardboard panels with a car carpet material. I also glued carpet material to most interior metal surfaces as this helps reduce condensation as it doesn't have anywhere to form on the panels. It also doesn't look half bad.

I would suggest putting the plastic sheet on the inside of the cab doors to protect the back of the hardboard from moisture.

Hope this all makes sense. The difference was pronounced. Much quieter.

[xpress]

ah robbo bro, did you use hardboard to panel out instead of ply? i am thinking of doing the same, it's cheaper, but are there any pros and cons to using hardboard instead of thin slices of plywood? cheers guys.

[slobbo]

Hardboard has been used for years. Just use plastic sheet under it on the cab doors to keep the moisture from it. A lot of the boards you get now is mdf. You'll need plastic sheet under that as well.

[ambivert]

I found some great stuff recently - the loft insulation that's made from recycled plastic fibre.
Its non-irritant, extremely good acoustically & thermally, easy to use, and cheap. I got 2 rolls of it for the price of 1, that's £15, from B&Q. Its 4" thick, but you can easily tear it into 2" thick sheets, so it goes twice as far, without appreciable loss of insulating qualities. 2 rolls would cover 3 sq m usually, but having torn mine to 2" I found I had 6 sq m and this was more than enough to insulate the sides of my pop top, which was why I bought it in the first place... and it came in very handy last weekend too!

[HarryMann]

I found some great stuff recently - the loft insulation that's made from recycled plastic fibre.

KNow the trade-name of this stuff?

[xpress]

great stuff guys. i am sure we can cobble something out of all of this for the wiki .. keep it coming!

i am going to check out this recycled plastic fibre, sounds good!

another thing, cheapest place to find hardboard in london/surrey area, wickes?

next thing, what's the best way to affix the board to the sides, screws and rubber backed washers? or screws and a block of wood on the other side to screw into?

what size screws and washers did you guys use?

can anyone help me estimate how much hardboard and rough dimensions i would need to panel out a panel van (no windows at the back as yet).

while i wait for that i am going to find the specs for the t25 panel vans to see if i can get a cubic space dimensions

[xpress]

i have the dimensions, going to take a look. i am thinking three big bits of board for sides and top and then fill in the blanks with offcuts of hardboard.

[ambivert]

I found some great stuff recently - the loft insulation that's made from recycled plastic fibre.

KNow the trade-name of this stuff?

Nope, but if you go to the B&Q product search page (http://www.diy.com/diy/jsp/index.jsp?ic ... ore_bubble" onclick="window.open(this.href);return false;) and search for 0000003716250 that will show you the details. Its funny stuff, like pale green cotton wool...

[xpress]

i been out today looking at bits.

nice big panels of hardwood i think the bigger the better so not much messing around with the coverings and then cut hardwood for around the arch.

i took a look at this green stuff, looks like a winner, as opposed to this space mountain stuff that's recycled glass, imagine that bending around in the bus and breathing those particles in? seems like it's only held in by a very thin plastic bag with holes in it!

the green stuff says it's non itching and not going to trigger any allergies i am going to use it and rip it up into 2".

to be honest i might back the board with that, then seal it up with tape allowing it space to expand and seal it with the silver thermastuff.

that might be the plan anyway. i am just going to use some wood blocks and screw into those here and there and bob's yer aunt.

[slobbo]

Are we not off topic now. That sounds like (no pun intended) it's more for thermal insulation than sound. Although it will help with sound.

[mikestef]

I e-mailed that company you recomended Rob,I am hoping to get a few prices.Because we live in Spain,its difficult to go with just a name of a product and hope to be able to get it here!We are going back to Ireland for the summer (hopefully in van)And I will maybe do the job there,so b&q shoplists are convenient (as we have them in Ireland now)and if not can get products shipped to us.I really like the idea of useing that cheaper roof sound deadening like the guy used in the Youtube clip you posted,I believe in trying to find the cheaper alternative and its great to hear what other people have used and have success with,I also can appreciate you somtimes get what you pay for.Big companies make their money on telling people they are "The best".So,its sometimes hard to see the wood for the trees!Anyway ,I will probabley end up going with the roofing product covered with that closed cell foam as you did,then followed by some form of insulation,that green plastic insulation from b&q or use the foil bubble wrap,then completely seal over panels with strong plastic sheet(glued onto panel frames)I thought if I went with the foil covered bubble wrap it might be a good idea to glue onto inner side of plastic sheet so it would leave a nice gap of air between it and the closed cell foam.

[Pepperami]

[xpress]

nice one pepperami, i will take two!

this is the thing, i want to insulate and sound deaden at the same time. i am just going to experiment with thermowrap and green plastic insulation to start with, if i need to add some pads to the middle of the wobble on the panels then i will. definitely some things to think about in this thread!

[Pepperami]

I must admit i do like to be able to hear the rattles and squeeks as they happen.