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08-12-2015, 04:04 PM
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#1
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Sep 2014
Location: Las Vegas, NV
Posts: 499
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Reflectix Under Screens
Hi everyone. I'm traveling back to Yuma in a week or so. It won't be quite as hot as my last trip a couple weeks ago (116°) but it'll still be up and over 105°. My A/C was able to keep the interior relatively cool, but just barely. Even though it won't be quite as hot, I've been thinking of some options to beat the heat and save the strain on my A/C's.
I have blackout screens on both interior and exterior of the windshield (that snap on). I was wondering if a layer of Reflectix under the exterior screen would help? I mean... I know it would help, but what I'm wondering is if Reflectix is designed to work better as the outer layer of protection or will it be just as effective as an under-layer?
Thanks!
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08-12-2015, 04:11 PM
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#2
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,794
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Quote:
Originally Posted by Wryly Blithe
Hi everyone. I'm traveling back to Yuma in a week or so. It won't be quite as hot as my last trip a couple weeks ago (116°) but it'll still be up and over 105°. My A/C was able to keep the interior relatively cool, but just barely. Even though it won't be quite as hot, I've been thinking of some options to beat the heat and save the strain on my A/C's.
I have blackout screens on both interior and exterior of the windshield (that snap on). I was wondering if a layer of Reflectix under the exterior screen would help? I mean... I know it would help, but what I'm wondering is if Reflectix is designed to work better as the outer layer of protection or will it be just as effective as an under-layer?
Thanks!
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I bought a large (wide) roll of Reflectix from Camping World and cut it to fit the front windshield. I put it inside above the dash. It does a great job!
I don't see any reason it would not work just as well outside the windshield!
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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08-12-2015, 05:06 PM
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#3
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Senior Member
Ford Super Duty Owner
Join Date: Oct 2014
Posts: 706
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Alright - don't mean to be Dennie the Dunce but how do you use this for the windshield? I have a gas Class A with a motorized front blind.
Thanks
__________________
US Army Retired - loving it in our Challenger 37TB.
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08-12-2015, 09:17 PM
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#4
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Sep 2014
Location: Las Vegas, NV
Posts: 499
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Well, I can tell you how I was thinking about using it... there are a couple of ways:
- I have exterior sunscreens that snap onto the windshield (all my windows, actually). I was thinking I could put a layer of Reflectix under the snap-on sunscreen. That would stop a lot of heat from ever hitting the windshield in the first place, and block a lot of the heat transmission to the inside.
- I could use round Velcro tabs to hold a big sheet of Reflectix to the interior of the windshield. The windshield glass would get hot, but I believe there would be less heat transfer to the inside.
- I also have MCD shades in on the interior of the windshield - both a sun visor and a night shade. I could contact cement a sheet of Reflectix to a thin sheet of Styrofoam or maybe some foam and stand it in between the two shades. I don't think this would work as well, though, because the heat would already be inside.
But the real issue though is this: Would a sheet of Reflectix work under my snap on sunnscreens? Maybe the Reflectix needs to be the outermost layer to be most effective. If the Reflectix is under my sunscreens, it can't possibly reflect as much heat away, and I have to wonder if it would be effective enough to make it worthwhile.
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08-12-2015, 09:50 PM
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#5
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Junior Member
Ford Super Duty Owner
Join Date: Dec 2014
Location: Monroe, Wa
Posts: 29
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It would definitely work better on the exterior side. The reflective part does not come into play if it is under the sn on sunscreen. You would still have the insulating value of the bubbles but you would not get the benefit of relecting the heat before it gets to what is underneath.
__________________
RandalVV
2003 Fleetwood Flair 33R
F53 V10, 2006 Suzuki Grand Vitara
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08-12-2015, 10:30 PM
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#6
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Senior Member
Join Date: Jun 2015
Location: Chicago Area
Posts: 635
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Yes it will work fine under the cover. Back when we had a popup we put it in all windows and under the beds, made a big difference.
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08-12-2015, 10:37 PM
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#7
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Senior Member
Join Date: Jun 2015
Location: Chicago Area
Posts: 635
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Quote:
Originally Posted by RandalVV
It would definitely work better on the exterior side. The reflective part does not come into play if it is under the sn on sunscreen. You would still have the insulating value of the bubbles but you would not get the benefit of reflecting the heat before it gets to what is underneath.
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the infrared heat radiation would still be reflected back out, that's why really good thermoses have mirrored insides, to reflect the heat back into the liquid.
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08-13-2015, 08:11 AM
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#8
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,794
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Quote:
Originally Posted by bigben
Alright - don't mean to be Dennie the Dunce but how do you use this for the windshield? I have a gas Class A with a motorized front blind.
Thanks
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I just cut mine large enough to wedge in behind the motorized front blinds and the dash below. We pull the inside curtains too, but that's just for looks!
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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08-13-2015, 08:32 AM
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#9
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Senior Member
Join Date: Jan 2013
Posts: 862
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Be careful with the Reflectix on the inside. If you sit very long the the heat can cause the silver coating to release and stick to the glass like glue. Leave a small air gap. Ask me how I know!!😖 That stuff has to be razor scraped off.
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08-13-2015, 08:54 AM
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#10
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Junior Member
Ford Super Duty Owner
Join Date: Dec 2014
Location: Monroe, Wa
Posts: 29
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Quote:
Originally Posted by Filthy-Beast
the infrared heat radiation would still be reflected back out, that's why really good thermoses have mirrored insides, to reflect the heat back into the liquid.
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That is true if there is an air gap. The term "radiation" means to send out rays, aka; the sun. Once the surface is in direct contact with the solar shade, heat transfer turns into conductance mode between the reflectix surface and the solar shade, so you loose some of the reflective benefits.
__________________
RandalVV
2003 Fleetwood Flair 33R
F53 V10, 2006 Suzuki Grand Vitara
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08-13-2015, 01:50 PM
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#11
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Sep 2014
Location: Las Vegas, NV
Posts: 499
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All excellent replies, and exactly the information I was looking for!
I'm going to start with the Reflectix under the exterior windshield screens. I know it reduces the reflectivity somewhat, but it's the most convenient solution and I'm hoping it works well enough. The park I'm staying at in Yuma for a couple of weeks faces East-West, so your windshield gets blasted by the sun from about 8am until 1-2pm. We will see very quickly whether it works or not.
I'll keep this thread posted. Thanks everyone!!!
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08-13-2015, 02:44 PM
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#12
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Senior Member
Newmar Owners Club Solo Rvers Club
Join Date: May 2013
Location: Mountain West
Posts: 1,178
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Hi Wryly,
I don't have any quantitative results but I have tried curtain only, Reflectix sitting on dash between windshield and curtain, 95% black sun shades on exterior of windshield, and combinations of all three. It seems to me that all three performed the best - a 'the more the merrier' lesson, I suppose. The exterior sun shade make a huge difference, as does the Reflectix (on the inside).
FYI: Home Depot sells the Reflectix in a size roll that almost perfectly fit my windshield (inside) for not much money ($25 maybe??).
__________________
JD - Full timer out west
Missy - 1998 MCI 102-EL3
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08-13-2015, 03:03 PM
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#13
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Senior Member
Join Date: Nov 2011
Posts: 698
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Quote:
Originally Posted by Wryly Blithe
Well, I can tell you how I was thinking about using it... there are a couple of ways:
- I have exterior sunscreens that snap onto the windshield (all my windows, actually). I was thinking I could put a layer of Reflectix under the snap-on sunscreen. That would stop a lot of heat from ever hitting the windshield in the first place, and block a lot of the heat transmission to the inside.
- I could use round Velcro tabs to hold a big sheet of Reflectix to the interior of the windshield. The windshield glass would get hot, but I believe there would be less heat transfer to the inside.
- I also have MCD shades in on the interior of the windshield - both a sun visor and a night shade. I could contact cement a sheet of Reflectix to a thin sheet of Styrofoam or maybe some foam and stand it in between the two shades. I don't think this would work as well, though, because the heat would already be inside.
But the real issue though is this: Would a sheet of Reflectix work under my snap on sunnscreens? Maybe the Reflectix needs to be the outermost layer to be most effective. If the Reflectix is under my sunscreens, it can't possibly reflect as much heat away, and I have to wonder if it would be effective enough to make it worthwhile.
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I would suggest you not use Velcro tabs on the interior as they will not stand up to the heat more than a few days. I know because we tried this. What worked for us was to suspend the reflectix on the windshield using suction cups we got at Home Depot. We taped the reflectix edge with aluminum tape and punched several grommets along the top. Works like a charm.
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08-13-2015, 09:28 PM
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#14
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Senior Member
Newmar Owners Club Spartan Chassis
Join Date: Sep 2014
Location: Las Vegas, NV
Posts: 499
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Quote:
Originally Posted by JFNM
Hi Wryly,
I don't have any quantitative results but I have tried curtain only, Reflectix sitting on dash between windshield and curtain, 95% black sun shades on exterior of windshield, and combinations of all three. It seems to me that all three performed the best - a 'the more the merrier' lesson, I suppose. The exterior sun shade make a huge difference, as does the Reflectix (on the inside).
FYI: Home Depot sells the Reflectix in a size roll that almost perfectly fit my windshield (inside) for not much money ($25 maybe??).
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If I can find a way to easily drape the Reflectix inside the windshield, I'll go that way. But so much of the sun-exposed windshield is up and behind the suspended cabinets that it would not be at all convenient, no matter how I fastened it there. I'll play with some ideas and post back here. But thanks!
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