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Old 03-19-2018, 09:51 PM   #1
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DRICore insulation/subfloor combination?

We are considering options for insulation and subfloor and are familiar with the use of ridgid 2" insulation with a framing grid. We found DRIcore insulation home improvement websites. Our plan is to be using our conversion in the summer months, primarily in the Midwest of the US for 3-7 day trips.

The R-Value is 3 which would be likely enough for our needs and also would reduce space loss. The subfloor is designed for mold prevention on concrete floors, however we are wondering if anyone has had experience using such a combination subfloor like this.

It is currently between $1.50-1.75 per square foot and would drastically cut down floor installation time and overall cuts made.

The idea would be to remove the current stock rubber and subfloor, then remove rust, seal with rust-o-leum, fill in holes, then apply the DRIcore floor.

Please let us know what you think!

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Old 03-19-2018, 11:47 PM   #2
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Interested to see how this works out for you.
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Old 03-20-2018, 05:16 AM   #3
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looks expensive, i used 1" rigid with 3/4 t&g osb over that with fantastic results. allot of things we do are not the best but good enough. this product would cost more than many people here pay for there bus.
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Old 03-20-2018, 05:53 AM   #4
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//DRIcore Subfloor has an R-Value of 1.7//

Im getting nearly 3x this R value from 1 of rigid foam board


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Old 03-20-2018, 09:30 AM   #5
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With a covering that spreads the wait, and maybe some strategic support inserts for furniture, many rigid foam boards have plenty enough compression strength to not require any "support grid".

Polyiso is one, and has best R-value.

The base floor must be sound and level of course.

For a permanent install, two-part spray foam in a thin layer underneath and to fill gaps, whole layer becomes one unit, still has some flex. But then a waterproof vapour barrier before the top layer, don't allow moisture / flooding to get down there.

Just spitballing more research needed
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Old 03-20-2018, 10:11 AM   #6
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Polyiso is one, and has best R-value.
Go read the last few posts in my Build Thread. Some major doubt has been cast on Polyiso v. XPS.
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Old 03-20-2018, 11:30 AM   #7
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Need a link
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Old 03-20-2018, 11:34 AM   #8
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Need a link
It's right there in my sig
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Old 03-20-2018, 11:46 AM   #9
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//It seems that the standard test for insulation is conducted at 75F. At that temp. the polyiso outperforms the extruded. That, however, is not the end of the story.

As the temperature falls, so does the R-Value of polyiso, and it can fall from 6.0 per inch right down to 2.0 per inch.

Conversely, the R-Value of extruded polystyrene is inversely proportional to temperature. That is, as the temp falls the R-Value of the XPS rises.

So when the R-Max has fallen to 2.0. the pink stuff has risen to 6.0 per inch.//


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Old 03-20-2018, 11:50 AM   #10
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//It seems that the standard test for insulation is conducted at 75F. At that temp. the polyiso outperforms the extruded. That, however, is not the end of the story.

As the temperature falls, so does the R-Value of polyiso, and it can fall from 6.0 per inch right down to 2.0 per inch.

Conversely, the R-Value of extruded polystyrene is inversely proportional to temperature. That is, as the temp falls the R-Value of the XPS rises.

So when the R-Max has fallen to 2.0. the pink stuff has risen to 6.0 per inch.//


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When I wrote that it seemed to go against the conventional wisdom, so it is posted for information only and people need to satisfy themselves as to what they use.
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Old 03-20-2018, 11:51 AM   #11
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It's right there in my sig
Can't see any sigs from here, why I asked.
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Old 03-20-2018, 11:53 AM   #12
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//It seems that the standard test for insulation is conducted at 75F. At that temp. the polyiso outperforms the extruded. That, however, is not the end of the story.

As the temperature falls, so does the R-Value of polyiso, and it can fall from 6.0 per inch right down to 2.0 per inch.

Conversely, the R-Value of extruded polystyrene is inversely proportional to temperature. That is, as the temp falls the R-Value of the XPS rises.

So when the R-Max has fallen to 2.0. the pink stuff has risen to 6.0 per inch.//


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Easy, 1/2" of XPS layer on the outside, then the rest in polyiso.

Proven best combo in coolroom / icebox testing.
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Old 03-20-2018, 11:53 AM   #13
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Only necessary for those planning to camp in the snow, IMO
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Old 03-20-2018, 11:54 AM   #14
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Can't see any sigs from here, why I asked.
http://www.skoolie.net/forums/f13/th...tml#post260010

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Old 03-20-2018, 11:57 AM   #15
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Easy, 1/2" of XPS layer on the outside, then the rest in polyiso.

Proven best combo in coolroom / icebox testing.
That sounds like a decent compromise.

So in the end I went with 1 1/2" of XPS. I am layering 1" and 1/2" and I found that the XPS will bend to the curve in the roof, which is handy.
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Old 03-28-2018, 03:34 AM   #16
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Clarification

To clarify,

We were referencing DRICore Subfloor R+ and were considering its use primarily for the thickness being minimal and its also for summer applications in mild Midwest summers. (DRIcore Subfloor R+ has an R-value of 3 as per its specs.
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Old 03-28-2018, 06:59 AM   #17
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DRICore Subfloor R+ appears to be simply 1/2" XPS foam attached to 1/2" OSB.
You can do that yourself with better results, in my opinion. I would opt for more XPS foam underfoot. Can you sacrifice the headroom and put in 1" or at least 3/4" XPS?

The subject of installing subfloors comes up a lot around here. My opinion is that the best method is to glue the XPS to the floor and the plywood (not OSB) to the XPS. No framework. No screws. Use weight (bricks, buckets of water) to keep the layers tightly sandwiched while the PL Premium adhesive cures.
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Old 03-28-2018, 07:47 AM   #18
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DRICore Subfloor R+ appears to be simply 1/2" XPS foam attached to 1/2" OSB.
You can do that yourself with better results, in my opinion. I would opt for more XPS foam underfoot. Can you sacrifice the headroom and put in 1" or at least 3/4" XPS?

The subject of installing subfloors comes up a lot around here. My opinion is that the best method is to glue the XPS to the floor and the plywood (not OSB) to the XPS. No framework. No screws. Use weight (bricks, buckets of water) to keep the layers tightly sandwiched while the PL Premium adhesive cures.
This is almost exactly what I've done.

I had the benefit of being able to leave the OEM plywood in. I added 1 1/2" XPS (layered, 1" + 1/2") then a layer of 5/8" plywood. No glue at all.

Because the plywood was not absolutely flat I have screwed right through into the bottom layer of ply, just to hold it flat. Building the rest of the interior on top will finish the job of keeping the floor stable.

Final calculated ceiling height will be about 74 1/2". I had the benefit of starting with around 78".
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Old 03-28-2018, 08:01 AM   #19
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Quote:
Originally Posted by jazty View Post
DRICore Subfloor R+ appears to be simply 1/2" XPS foam attached to 1/2" OSB.
You can do that yourself with better results, in my opinion. I would opt for more XPS foam underfoot. Can you sacrifice the headroom and put in 1" or at least 3/4" XPS?

The subject of installing subfloors comes up a lot around here. My opinion is that the best method is to glue the XPS to the floor and the plywood (not OSB) to the XPS. No framework. No screws. Use weight (bricks, buckets of water) to keep the layers tightly sandwiched while the PL Premium adhesive cures.


This is exactly what we plan to do

We have prepped our metal floor and plan to glue XPS directly to the metal floor then glue plywood to the XPS.

No screws or hardware

We are then gluing down a single sheet layer of vinyl. Will likely leave a little bit of the vinyl rolled up the edges of the wall in wet areas like kitchen and bathroom which will end up being hidden behind things anyway

Then everything will be secured to the plywood layer during frame in on top of the vinyl


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