NRP For Exterior Skin

Finishes, paints and coatings

NRP For Exterior Skin

Postby jwh92020 » Thu May 17, 2018 11:12 am

I'm building a 7 x 10 standy and I'm thinking of using the 1/16th inch NRP for the exterior skin. The walls are going to be 1 x 3 framing, 2 x 2 roof 'joists". Interior walls will be 1/8" luan underlay ply (not sure if they will get clear coated or painted) and the exterior walls will be 5mm luan underlay covered in the NRP. Each side will take 2 1/2 sheets of the NRP, front and rear will take 2 sheets each. Do I glue the entire wall and stick the NRP to it and use mechanical fasteners (ie - staples) around the perimeter of the sheet or do I float the sheet and just fasten the perimeter? The passenger side of the trailer will take full sun all day long and I'd like to avoid bubbles (fought them on a fiberglass TT we had long ago. I would rather not paint it, but if UV fade becomes an issue, i"ll paint it. Thanks for any info y'all can give me.
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Re: NRP For Exterior Skin

Postby greygoos » Thu May 17, 2018 8:26 pm

I have used FRP over foam and used PL adhesive with a notched trowel. I would think that just floating NRP or FRP can have some problems with swelling and bubbling from the sun. Neither of them are rated for UV exposure.
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Re: NRP For Exterior Skin

Postby jwh92020 » Thu May 17, 2018 10:32 pm

I'm not averse to painting it if need be. You glued the whole thing? Have you had any issues with bubbling?
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Re: NRP For Exterior Skin

Postby greygoos » Fri May 18, 2018 6:27 am

It is used as a hunting blind and has sat in the woods for the last 3 years. No issues as of yet. Use the search bar up on top. Type in FRP. There have been many builds done on here using FRP, some people painted and some did not.
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Re: NRP For Exterior Skin

Postby jwh92020 » Fri May 18, 2018 10:24 am

Thanks for the info. I'll read through the posts.
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Re: NRP For Exterior Skin

Postby razorback » Fri May 18, 2018 3:23 pm

My teardrop has FRP on the outside and the inside. Sherwin Williams recommends using Krylon brand paint for the FRP. Krylon is for plastic surfaces. Not many colors available in Krylon so we put two coats of Krylon on then a good coat of exterior latex in a color my wife OK'ed. Eleven years and over 36,000 miles and all is well. In the summertime on only 1 side in the hot sun I will get a bubble the dimensions of a softball. Only about 1/2 in deep. When traveling or when out of the sun it goes away. Larry
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Re: NRP For Exterior Skin

Postby slowcowboy » Fri May 18, 2018 7:59 pm

I built my tear in 08.used nrpfor exterior skin.nailed it. On with tiney brads.....no if harm sone in how long?? No issues,at all just avoid the final panels thats brittle..but bro holds up great...thumbs up!..slow...
Plans. there was supposed to be plans to be followed when I built this thing. Opps! AH, gee, tum,tee tum. I think I forgot about the plans 2 years ago. ------Tow vehicles, 1995 ford explore, 1994 ford ranger, 1993 ford F-150, 2009 4x9 Off road teardrop, on harbor freight greatly modified frame.
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Re: NRP For Exterior Skin

Postby slowcowboy » Fri May 18, 2018 8:04 pm

Spell check. I built my tear in 08. Used nrp unpainted on the outside skin no issues. Tried a vinal sheet on my inside of my hatch. It's to brittle junk breaks up fast..the normal nrp on the out side of my tear bends with out breaking.no sun light harm..very durable and i did not glue it on or use any glue building my teardrop. I nailed on the nrp with tiney brads..slow.
Plans. there was supposed to be plans to be followed when I built this thing. Opps! AH, gee, tum,tee tum. I think I forgot about the plans 2 years ago. ------Tow vehicles, 1995 ford explore, 1994 ford ranger, 1993 ford F-150, 2009 4x9 Off road teardrop, on harbor freight greatly modified frame.
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Re: NRP For Exterior Skin

Postby jwh92020 » Fri May 18, 2018 8:37 pm

Good info, thank you
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