Insulating a Floor Over an Unheated Space

[@4brens]

No vapor barrier on the cold side! That piece of info alone is gold. Thank you!

[@nofurtherwest3474]

I'm not so sure about that though. I think all houses have vapor barrier on the exterior side, so they're all doing it wrong?

[@waldo-ot6ul]

​@@nofurtherwest3474 Where did you get this info from that's not correct

[@nofurtherwest3474]

@@waldo-ot6ul i was thinking of house wrap. oops lol

[@jp_two3]

Finally someone has explained the proper way of insulating an exposed under floor for a sunroom. The added suggestion to cover the floor joist is key to prevent the transferring the cold temperature to the floor above.

[@raymonddavey9748]

What would be the best way to prevent rodents without doing a double vapor barrier?

[@richmondparkers]

@@raymonddavey9748 staple up a small-mesh-type chicken wire

[@leonardserrani9481]

Great video! I watch "how to" videos all the time and people just babble on and on. You were short and concise. Bravo. Thank you for the information.

[@toneroable]

Yes...he is good..well explained & in short time....(in other words...." no B.S. " ) Question....I have to do my crawl space insul. The beams are 24" in between & in winter...my crawl space becomes a swimming pool. Do I need to ventilate my crawl space well ??? Beams are 2 x 6. This house don't have subfloor either.... the old insulation wasn't the rigt insul, & is falling off...The house for this reason U feel the cold in the winter as U walk upstairs. The heater works all day. I checked in H Depot today....they say R-30......but each package is $ 90.- & a little too expensive. I take any advice..... ……...……………...…...……...……...…...…...……. Thnks for your time !!!!

[@travissaunders4346]

Thanks so much for posting. Very helpful and easy to understand explanation. I have been a attic insulator for almost ten years but recently I was asked to insulate a friends raised sunroom floor. I had a few questions on how to go about it, but after watching a your clip, all my questions are answered and I m ready to get the job done now. Thanks again. I would recommend your channyto others biased on my experience. Good work

[@Gman-sb3zf]

Excellent, This is the solution I was looking for under my sun room. Thank You

[@ljchalifour]

After I insulated I put on tyvek building Wrap. It breathes and helps keep rodents out of your insulation. You do not want vapour barrier this will cause mold over time from trapped moisture.

[@pleskbruce]

I used rockwool in my walls in love it. For ceilings I had to go with blown-in cellulose because of the number and positioning of all my electrical wires. Seems to be a great combo. I can touch my kitchen wall (inside) while it's getting direct 5 pm sun outside on a 95 degree day and it will still feel cool. :) Rockwool is also fire retardant and there are a lot of KZbin videos demonstrating this.

[@smallfeet4581]

So it's cool in summer but warm in winter , where I am it's damp so I guess this would be what I'd use , but I don't like fibreglass l would prefer wool treated with borax , I don't have a glue about all this stuff

[@76TomD]

Vapor barrier should installed be above the insulation if the space above is conditioned/heated-cooled.

[@ProArch]

This is great. Thanks for putting it together. Prior to seeing this, I was going to use plastic.

[@mar4380]

In Florida. I have an office study above garage. What should I use to insulate to avoid moisture and AC loss in the office study. The garage isn't temperature controlled.

[@gaberobinson4143]

Great video, I like the comfort board for the extra mile, will def be doing that!

[@Pentharian]

So glad I found this video. I've been trying to solve this exact problem. Off to the neighborhood lowes to pick up 8 bags. Thanks!

[@ROCKWOOLNorthAmerica]

Hello, we're glad you found this video helpful. Do let us know if you have any further questions. For more DIY information, visit diywithroxul.com - ROXUL

[@superjakeny]

ROXUL INC. my porch is less than 2' above the ground and exposed I am worried about water and pests any suggestions? should I cover the entire bottom with plastic?

[@ROCKWOOLNorthAmerica]

Hello Jacob, Good construction practice calls for the insulation to be adequately protected to minimize moisture exposure, physical damage and contamination. For further information or to speak with our technical innovation centre, please call: 1-800-265-6878 Regards, ROXUL

[@chipanddiane]

Awesome video. We just bought a house with an open Pier and Beam Foundation with a covered deck... want to make sure we are insulated fully and was worried about moisture etc. GREAT VIDEO THANK YOU>

[@MichaelTa-xx7qu]

do you have a different strategy for exposed underside of conditioned spaces in a hot and humid climate?

[@yourbrokenoven]

the "cold side" changes depending on the season. In the summer, the inside is the cold side. in the winter, the outside is the cold side. so where do you put a vapor barrier?

[@gabrielwhalen3382]

this was super helpful.

[@virginiametcalf4438]

Do you put something on top of the foam to prevent animals such as chipmunks, squirrels, rats, etc from making a warm bed out of your insulation. Or does covering the insulation give concerns for condensation and moisture build up?

[@Terbug]

Can you use this in your unheated basement? I had it professionally spray foamed from moist to floor, but when it gets folders outside my main floors are cold. Thank you in advance.

[@HatedJared]

We have a similar situation where we have a raised deck (enclosed) that juts out over our walk out basement. We are wanting to insulate the enclosed deck but since you walk out the basement and can see the floor above, is there any issue with putting up an aluminum siding type material over the insulation?

[@michaelfazio4122]

Great video.i have a mud room floor that i need to do this summer thanks

[@john-sw1nu]

I have a cabin with a exposed floor only a foot or two above ground, will the rodents tear this apart?

[@cc-ft8gq]

Excellent video. Exactly what I needed to do this to my sunroom 🤗

[@roxannreid-rojas3391]

I have an huge room over a drive through area under the house. We need to insulate it and you are saying not to put a vapour barrier there. What do we use instead?

[@sweettbball]

did you put plyboard to finish after the comfort board?

[@francineabell7180]

Well you showed me exactly what I was thinking to do or have done under the deck interlocking flooring for our three season room. Nobody else, builder, contractor or my husband (sounds like work) mentioned it. Maybe because it will only be 4ft of height to get in there!

[@k.j.g.9601]

Dude! Great video (just subscribed) we’re buying a house with a screened porch that we want to finish. This was super helpful. Unfortunately getting under the whole space may not be possible. How can I build a weather barrier under those studs? Thank you for posting this!

[@jtstandar]

What would you put over that stuff to keep the critters out? I.E. Bugs, Rodents, etc. etc.

[@matthewkenna1053]

After the bats are installed, would you seal it with plywood?

[@jessemathews7470]

If you do, make sure you drill holes in it for air flow but you don’t have to so why bother

[@malcb1864]

Would this be the same for example an integrated garage that goes into the house? Why do they use a vapour barrier in a loft over the roof rafters?

[@FallLineJP]

What product would you use as a vapor barrier on the warm side (above the rockwool) if required by AHJ?

[@HeroesBosses]

This is exactly what I wanted to know! Great video!!

[@leeknivek]

i would use hardware cloth or wire mesh to hold that in, especially if it's outside. that stuff will crumble apart!

[@Howdydoody1946]

Isn't that an open invitation to mice and other critters to set up housekeeping? How do you keep them out?

[@ForTheAges]

Unlike fiberglass, mineral wool insulation is inhospitable to insects and rodents. It shreds the exoskeleton of invertebrates and supposedly irritates the lungs and skin of mammals. As extra security, you can install "hardware cloth" (wire mesh screening) over the whole thing.

[@patriciasheets7166]

Hi it was a cat who had been having kittens under my house for awhile. Got a cage from leasing office and caught it they came and got her. No rats under there. Ive cleaned it all out and put up R30 and used the same material that came from factory

[@nathanyamaha465]

What would the best covering be if you wanted a finished look that will not lock in the moisture?

[@thedolloffteam]

Thanks for the nice video. Home owners get the vapor barrier concept backwards and put plastic over the insulation.

[@ROCKWOOLNorthAmerica]

Hello cderekbower, Staples work too. How your straps are secured can be done to your personal preference. - ROXUL

[@ROCKWOOLNorthAmerica]

Hello Andrew, Most jurisdictions require a vapour retarder and the prudent course of action would be to determine if one is required in your region. In terms of “breath-ability” of the vapour retarder, you simply need to specify a material that is below the maximum permanence of the vapour retarding membrane specified in your local building. Thank you, ROXUL

[@BorTrip-nm8gw]

Any recommendations on what to enclose this with? My current sunroom is enclosed with what looks to be 1/4 plywood. It does not look the best after years of service. Should I replace with same thing? I should say enclose the insulation on the bottom

[@runningwolf8115]

I am using comfortbatt r28 in the sub floor of the basement .I was wandering if I use comfort board to cover the exposed joyce after installing the comfortbatt to prevent thermal bridging will this be the best solution or do you know a better application . his comfortboard is is the same product has comforboard 80 home exterior

[@grattanoneill3870]

What size nails are you using? Also, will the comfortboard leave gaps where you see insulation?

[@ferrarionemr]

What about crawl space. In mass. Have a dirt crawl space. 3,000sqft. Not using it. Was going to put r30 rockwool. Do i need vapor barrier

[@TroyRuby]

Great video, but how do you keep animals from chewing on it on the underside of a structure if it's not covered? I can see this being a tempting resource for mice.

[@ag123789]

Fantastic Video! You sir, are a good pro!

[@TishaRicks]

Can R-28 be used in vented crawlspaces?

[@runningwolf8115]

can this be used on under floors in a home . does the Roxul comforboard has the same fire resistance has the insulation and would be ok to install in a under floors of a home were some of the furnace pipe are close to the basement ceiling

[@jessicahuber3512]

If my exterior space is a foot off the ground will critters rip it apart for there nests?

[@dieck2004]

what does the lifetime of both the rockwool and the panel look like if its completely exposed to elements? how about ina crawlspace?

[@abearce6599]

Should i spray foam joists before installing batt?

[@rediryou]

Thanks for the info, just what I was looking for. Now I need to look for that stuff!

[@crzy11000]

should you not install vapor barrier above the insulation between the joists? it would then be on the warm side of the insulation.

[@leighadolan4134]

crzy11000

[@martinpoulsen6564]

yup, or on top of the sub floor (underneath floating floor system), would be even better, as it is a flat surface, and you'd have easier access to the vb in the walls to connect everything. It's main function is to keep vapors from entering the structure from within the house. I'm not sure how that works exactly in hotter areas, since it switches back and forth between hot and cold side, but up north or in the mountains, that is the way to go. seal every joint tight to prevent moist air from leaking. In hot and dry climate I'd leave out the vb. The hot and humid is where the trouble is, as the structure potentially enters from the out side, and could condense on the vb within the structure, due to use of ac, which would be no good at all. It would probably have to be placed differently, or left out altogether.

[@robertkrause997]

I'm completing a project identical to the one shown in the video. However, I purchased comfort board with a foil on one side and wondering if foil faces toward the insulation or down toward the ground?

[@jwnagy]

Could this insulation type be used in an unheated crawl space?

[@mammasbabas]

What do you cover this with? Do you then enclose the space with plywood or something?

[@cindyv418ify]

Same question

[@albergaharriott5257]

I would love an answer to this too as that foam board is kinda thick to be able to get plywood to seal off the area

[@phenosin1]

I have a piece of pex tubing running along a joist, could I notch the insulation board so it stays flush?...Do you recommend anything on the ground...rocks, plastic etc.?

[@ROCKWOOLNorthAmerica]

Hello phenosin1, we would recommend you contact our Technical Services Department to ensure you receive the correct guidance on your project. They can be reached at 1-877-823-9790. Regards, ROXUL Inc.

[@troyroberts115]

What a situation were I want to keep mice out of it

[@raymonddavey9748]

I was wondering the same thing how to do some kind of rodent barrier without making a double vapor barrier??? If I were to use mental will it create condensation? We are building a 16x35 tiny home for the lake on an old mobile home frame.

[@muohiodpowell1974]

What keeps animals from nesting into the wool?

[@ernestlambert6809]

I live in Atlanta GA (USA) and our master bedroom/bathroom is above an unheated/cooled crawl space. The crawl space is encapsulated but these rooms are cold in the winter and hot in the summer. Do you think the Roxul ComfortBatt R30 is the right product to use? We also considered a closed cell foam board.

[@ROCKWOOLNorthAmerica]

+Ernest Lambert Hello Ernest, yes ROXUL COMFORTBATT is an excellent option for insulated vented and unvented crawl spaces. Check with your local building codes to determine the proper R-Value required in your region. We have an interactive guide specifically for crawl spaces, click here to learn more bit.ly/CrawlSpaces Please let us know if you have any further questions. Regards, ROXUL

[@lewis626bv]

I want to install a vapor barrier above the Roxul. What products can be used for this?

[@ROCKWOOLNorthAmerica]

Vapor Barrier if used should always be placed on the warm side of insulation and typical use would be in exterior walls or ceilings below roofs. Materials options are polyethylene ( 4mm / 6mm plastic sheeting) or “Smart Membranes” (more permeable material) or Latex / Vapor retarding paint on the drywall side. - ROCKWOOL

[@mdfullen]

How about installing this in a space that has a porch ceiling already installed on the bottom. So installing it from an open end within the basement?

[@tinatahdah9907]

Is a vapour barrier required when insulating the floor of a room over an unheated garage?

[@jessemathews7470]

Yes…

[@ableminded4811]

Thanks for the video: Where did you get that strapping... I happen to need some of that exact stuff for a different project.

[@andrewcaruthers9737]

Yes, a great video, Thanks! I'm doing the same project, but I have to use fiberglass (R30). Do I need a vapor barrier for fiberglass? If so, should it be breathable or non breathable?

[@dondutra3086]

can/should this be used for a basement ceiling?

[@jessewood3999]

My same question, I have a bedroom over a basement garage going to be difficult to drywall and mud

[@j.5043]

Great video! I am looking to install a ground level floor and convert a shed like building into an office. I was wondering how you could install this from above and still protect it from rodents. Could you install Plywood on the bottom or would that present other problems such as moisture?

[@timferreira6882]

J. We usually use pressure-treated plywood especially if it’s ground contact or you could nail strapping in between the joist then strips or plywood in the bays then the insulation on top of that

[@AugustLaw7]

Link to exterior grade strapping? Or at least the name?

[@bradywalsh3762]

What is the comfort board I s you mentioned Cant find that anywhere What is a better description

[@ROCKWOOLNorthAmerica]

Hi Brady, Connect with your local rep... they should be able to track down your closest dealer! www.rockwool.com/north-america/contact/#FindaSalesRepresentative

[@FLKeyz76]

Great video! I'm looking to insulate below the floor of my sunroom which is sitting on a deck. I'm in Pennsylvania and get very cold winters and hot summers. Do I need a vapor barrier for my region? Also, will that type of insulation invite rodents etc into the material? The underside of my sunroom floor is open to the air and small animals can access the area.

[@zipstuff]

How did you end up doing this? I am about to tackle the same?

[@davida3343]

Question man ..I bought exact some one its sound prof ..but it's thinner than the one you have here ..maybe 4 inches, is it still okay to put it up ? Am Doing basement

[@wdsracer]

Red squirrels and chipmunks would be ripping that to shreds and making their own homes in that within days here in western New York.

[@dustinhartley8988]

Def need to close it up with a board or something. Lol them critters be getting Into EVERYTHING

[@suchen42]

Can I double layer a r15 2x4 comfort batt to fill a 2x6 joist? How about a single layer but strap it so it doesn't slouch? Couldn't find comfort batts as thick as yours in the video.

[@ROCKWOOLNorthAmerica]

Hello suchen42, Doubling up on the R15 product would result in the insulation being too thick for the 2”x6” cavity space (~7” insulation). Ideally an appropriate thickness for this cavity should be sourced - R23 is 5.5” thick and is recommended for this application. Please call us at 1.800.265.6875 and we can help direct you to a dealer near you. Regards, ROXUL

[@Jeff-qq1tz]

Amazing video!

[@dandeangeli9860]

Very helpful. Do you find that Roxul does a better insulating job than Fiberglas bat insulation in this application?

[@76TomD]

Roxul outperforms fiberglass

[@shedroids]

I would like to convert my desk screened in porch into a glassed in 4 season room so this was awesome. Rabbits get under my porch which has little less room in height than in your video. Do you have advise for how this would work out where critters are concerned? Thank you! :)

[@jonkern9503]

I was wondering if I could Roxul underneath my unheated my back porch. Now I know! I'm actually insulating my back porch walls with Roxul right now (taking a 10 min break). I'll never go back to fiberglass again!

[@samyoungblood3740]

Can a person screen it in so insects can’t find their way through?

[@peterbergeris6510]

Wouldn't you use a vapor barrier on the cold side?

[@angtoddjohnson]

Helpful indeed, thanks

[@SchneiderC1952]

I know that this is an older video but I hope my question will be answered!! I have 2x10 joists in my basement!! What Roxul product is recommended for this space? If the biggest product you have is 7.25 inches in height then do I leave the 2.25 inches air space or try to fill it completely with product or just place the product at the bottom of the joists!! Thanks, Looks like a great product

[@ROCKWOOLNorthAmerica]

SchneiderC1952 Thank you for your interest in ROXUL. ROXUL COMFORTBATT 7.25 inch thickness will work, or a layer of 5.5 inch and 3.5 inch to get to 9 inches total. For more information about ROXUL COMFORTBATT, please visit @1 for more information, or call our Technical Innovation line at 1-800-265-6878 for specific information about your project. Regards, ROXUL

[@davidstrickland6428]

There is another important item to consider: rodents that love to eat in and live in insulation. I would suggest using 1/4"x1/4" galvanized mesh. That helps, but it won't stop termites and such.

[@FutballShowNA]

So you don't even recommend using a vapour barrier on the bottom of the floor on top of the Roxul (which would be the warm side)?

[@ROCKWOOLNorthAmerica]

+Patrick McGahern Installing a vapor barrier will depend on your climate zone and respective building code. We would recommend contacting a building official regarding the use of a vapor barrier in your location. For more information, please visit us at www.roxul.com or call our Technical Innovation Center at 1-800-265-6878. Regards, ROXUL

[@johnysilver1853]

How thick is the insulation?

[@joe1623]

hi, hoping you may be able to advise, we own a first floor apartment directly over our ground floor carport. We experience very cold floors and temperatures drop very cold in the winter. I can see that the ceiling of the car port is boarded but no idea on insulation behind. are you able to advise the best coarse of action to keep the cold out (I assume I will need to check behind one of the boards to see what's currently there (am based in the UK). am I able to send a photo?

[@ROCKWOOLNorthAmerica]

+Joe Creed thank you for your question. We would certainly recommend removing a few boards to determine what or what isn't currently insulating the ceiling. As our expertise is in North America, we would recommend you reaching out to our UK division (ROCKWOOL UK) as they'll have the best information/advice for your situation. Please feel free to contact them here with your question and someone will be happy to assist you further bit.ly/UKCustomerSupport Best of luck on your renovation and please let us know if we can be of further assistance. Regards, ROXUL

[@joe1623]

Hi, sorry for the delay in my reply. I have removed one of the boards and have found that the board is around 5cm thick, then there is an open void of approx. 8-10cm before hitting concrete. (there are 2 batons of wood that the board screws into.I have contacted Rockwool with a photo and they have suggested a product called Rockwall RWA45. Would you say this is a similar product to the one in this video? ThanksJoe

[@AngelRivera-gm7bx]

Can I use this for crawl space area ? Or do I need it with face ? Thanks

[@Kashype101]

So where can I buy?

[@sissymurphy9620]

Where can I buy the roxul mat in Virginia and I also cannot find the insulation for my floor joists here .I can only find the stuff for 2x4 wall studs .I want to do my crawl space walls

[@ROCKWOOLNorthAmerica]

Hello Sissy and thank you for your inquiry. Could you please clarify what you mean by ROXUL "mat"? ROXUL COMFORTBATT can be used for insulating your floor joists and is available in multiple sizes and R-Values to suit your needs. If a retailer does not carry the correct size and/or product in-stock, you can request a special order to be delivered to your nearest location. Please see our brochure for more information. www.roxul.com/files/RX-NA_EN/pdf/Comfortbatt%20Sheet_Eng.pdf Best of luck, ROXUL

[@cindyv418ify]

How can I make it look pretty???

[@RussellBennettSings]

Leo Chalifour mentioned using tyvek building Wrap after insulating because it breathes and helps keep rodents out of your insulation. Can anyone tell me if they actually have done this and how it seems to be working?

[@sunnysacto]

Best way to go is keep all critters out. Seal Crawl space good and be proactive checking for entry issues. My horror remedy came with a cat on 24/7 rodent control.

[@sunnysacto]

Modular homes come with plastic sheeting, perhaps to protect insulation during 60 mph road drive. Should I remove all this plastic to expose R-19?

[@sunnysacto]

Home is located in mild CA valley climate.

[@ROCKWOOLNorthAmerica]

Hello Sunnysacto, because of your unique situation we would recommend you contact our Technical Services Department to ensure you receive the correct guidance. They can be reached at 1-877-823-9790. Regards, ROXUL Inc.

[@serotonin67]

Thanks, good video, but please pass the following Pest control question to Roxul Inc. Where in any data sheet for Roxul products does it address how it discourages pests such as Termites, and carpenter ants ? Are Roxul products treated with Borate like Cellulose ? Also, how will I be assured a mouse or other rodent will not likely nest inside ? If not treated with Borate, is it recommended to treat the floor joists prior to insulating with a Roxul product ?

[@ROCKWOOLNorthAmerica]

Hi there Sam, great questions. We encourage you to visit our FAQ's for any top questions. www.roxul.com/support/faq/ If you still need clarification for some questions, our technical team would be happy to help. They can be reached at 1-877-823-9790. Best regards, ROXUL

[@violeman]

Does anyone know how much a bag of this insulation is worth right now in Canada? I am in dire need of this stuff for under my main floors in an old farm house that right now (Past 2 years has cost), $700-$850 every 3-4 weeks if we leave the propane furnace running... The furnaces were just installed also... Last winter in Mid western Ontario, It got down to around 43 C on our main floor cause we were still catching up from the year prior ... We had a couple Infrared heaters up stairs so that helped large , But we had to pretty much live upstairs in our bedrooms... Thanks 4 Sharing Bud!!

[@ROCKWOOLNorthAmerica]

Hello, +violeman ROXUL insulation is sold at all Home Depot and Lowes locations in Ontario as well as other small lumber or home improvement locations. ROXUL COMFORTBATT is the product you're looking for, for this type of application. For more information on this product and installation instructions for insulating between floors, click here bit.ly/1LONzAg. Please let us know if you have any further questions. Regards, ROXUL

[@sunnysacto]

That's why I live in mild CA valley that cost only $60 monthly utilities

[@Ben-nx7yy]

Helpful, my parents told me to live in the sunroom but the darn thing has too many windows and no insulation, now that summer i here the room gets up to 93° in the day and 79° at nigh so im having to DIY fix it, if anyone has tips please send em to me anything is useful

[@thedailylunchbox-foodforth6307]

How did it turn out? I'm looking to do the same thing for my sunroom.

[@thzzzt]

Strapping? On page 18 of Roxul's Energy Star manual "Earning Our Stars" they want strapping every 8". Are they out of their mind? This is more strapping than even fiberglass batts need. And then on the same page it says to "install a vapor retarder to the underside of the sub-floor" in Step 1 and Step 4, but at around 1:20 in this video he says to NOT use a vapor barrier. So good luck making sense of that.

[@steveo1552]

Late to the party, I know - but "install a vapor retarder to the underside of the sub-floor" means BEFORE you put in the insulation. In the video he's saying NOT to put a vapor barrier on the outside of the insulation. So, you should, like a wall in your house, have the vapor barrier on the inside before the flooring or decking. I had a room built above a portion of my porch (our new front door area) and the sub-floor on top of the decking has board insulation and a vapor barrier, so I don't need a vapor barrier underneath the decking. About to go out and get R22 ComfortBatt for the outside and will cover with Ttvek. Should work well.

[@CashNYC]

what other R rating can u use?

[@MzLeci]

Informative and concise thank you

[@AngelRivera-gm7bx]

Hi, How do I insulate the crawl space door? Thanks

[@rustinstardust2094]

Interesting about the vapor barrier - so glad I watched this video before doing it!

[@nofurtherwest3474]

I don't think he's right.

[@mmjnice97]

Looks like a nice nest for all kinda cridders

[@50CenT123smoke]

Critters will die ingesting it lol

[@GINNYMAMDAVIS]

We have no crawl space below the wooden floor our porch we want to convert to a 4 season room. Is there a way to insulate without being able to get under it?

[@sunnysacto]

yes, but not easily

[@ROCKWOOLNorthAmerica]

Hi Ginny, the only other method to insulate the studs would be from the top if they cannot get under it. - Regards, ROXUL

[@pragneshpanchal]

I have 48in joists in crawlspace. The maximum width I see in lowes in california is 24in. What should I do?

[@sunnysacto]

Double up and use holding straps

[@ROCKWOOLNorthAmerica]

Hello pragnesh panchal, we would recommend you contact our Technical Services Department to ensure you receive the correct guidance on your project. They can be reached at 1-877-823-9790. Regards, ROXUL Inc.