Roof insulation?

I am going to install quarter inch thick Dynamat Dynaliner on my roof which is lighter than regular Dynamat Extreme I am going to install on the floor. I would rather buy a product that is made for the job and pay the price once rather than install something that may not be the best product for the job and cause me to spend more money and time replacing it and reinstalling what I should have used in the first place.

 

or people bad mouth it due to having tested it and tested/comparing it to other products..

theirs a youtube vid of various CLD matting that was put in the oven at 400 deg i believe for 20 mins? and non really slid very far from original positions think peel n seal was one of them..so you know they can all take the heat

I can go on about the proper products for the job, but some people dont care
though for roof rain drops create resonance, so cld is the correct matting for this job..can also add a thermal matting too to keep things cooler when in the summer

either way this is about the best thread you can readup on and see real results on performance of CLD matting..aka vibration/resonance deadeners
http://www.diymobileaudio.com/forum...ns/146403-sound-deadening-cld-testing-25.html
page 9 is the start of the results
PNS is the top 3? worst out of the 20+ products tested..no only in limited resonance frequency blocking...but also in the waterfall plot..which is how fast the vibration rolls off

Airbourne deadening like roadnoise is another material/subject.. but CLD does aid a lil in this..just not the proper material to use ...by its self anyways

 

Fat mat and PNS are exact spec, one is just rebranded and sold for more $$$
tests in the link I provided confirms this with measurements of constraining layers/weight and the final resonance test results

 

Again, not for the roof, but regarding the floor; while P & S may not be "the best", if you look at what the original factory sound deadening material is on these cars, there's certainly nothing wrong with P & S.

Sure, there are probably better (and more expensive) options, but that applies to most things in life.

 

I agree with this little tidbit...

"I'm not sure how one would objectively measure this, but I have been subjectively keeping track. Believe it or not, so far, Peel N Seal was the second biggest pain to remove so far, after SDS cld Tiles."

......

"Whats interesting to me is the one that performs the best so far, was the easiest to remove, and was also an asphalt product. And the one that performs the worst, was the most difficult to remove, and also an asphalt product."

 

Since insulation and sound deadening are 2 different things...has anyone checked into the insulation value...not the sound deadening value?. The web site link is to a hardcore sound system forum. I'm sure they have a higher standard scrutinize lower sound frequency than the higher frequency of everyday road noise.

 

if anyone didnt catch that PNS = worst lol

butyl based CLD adhesive gets stronger over time
apparently from that quote, adhesive strength can vary even when they're both asphalt based..which obviously means that'll apply to butyl vs butyl
just because initial stick is better doesnt mean it'll last
but with any product just make sure you prep the material well prior to applying matting and make sure matting is well pressed on and should be golden

 

if you look at it like that yeah you are probably ..most likely right I guess

Stleast now with CLD people dont have to blindly go with which one is claimed best and unseeingly pay more for possibly less.
they can now look at that link and find the best to them and possibly come out with less $$ spent
plus only 25% coverage is typically only needed.

 

Maybe for sound deadening, but would you only insulate 25% of your house? That is what this thread is about...roof insulation.

 

No doubt. But the same thing could be said about using sound deadeners for insulation too. Which is what many here have proposed to do with some of the products being rec'd.

But.. as usual.. these types of threads tend to veer off for a bit from an OP's original question. Not that I have a big problem with that.. because I'm likely guiltier than most of such tangents.. but at least we can usually broaden the learning curve when it happens without arguments. Sure makes it harder to find it later on with the search function though.

 

From the Dynamat website "Dynaliner is the perfect ultra light weight insulator" That's why I recommended.

 

When it comes to cld matting yes
Now if you were to put foam or mlv up there then yes 100% coverage


25% cld matting would take care of the resonance raindrops create and mlv or foam would take care of air bourne noises

 

Someone mentioned using the Fiberglas original type stuff, I'm thinking about that. I also have many sheets of 1/4" blue " fan fold" foam. Where can I get the dynamat stuff local?

 

Now that there is funny, I don't care who you are or who it is about, that is funny

 

Of course, it may not be an option for ALL of us, but both of the Mavericks that I owned had vinyl tops, and I never had to work too much about "rain noise". I will be using the OE style insulation in mine. I actually just ordered some from CJ Pony Parts yesterday.