UV damage to boards?

UV damage to boards?

Post by shred.. » Thu, 02 Aug 2007 15:57:09


I know that UV is not good for sails but was wondering about its
affects on boards.  I see a lot of cars come to the launch in bags on
the top of cars and was wondering if the reason was to protect from
the sun or from nicks from rocks flying up ect. If I leave my
unprotected board on the top of my car for 2 weeks is it likely to
suffer damage from the sun?
 
 
 

UV damage to boards?

Post by cosmicharli » Thu, 02 Aug 2007 22:25:21


Quote:
> I know that UV is not good for sails but was wondering about its
> affects on boards.  I see a lot of cars come to the launch in bags on
> the top of cars and was wondering if the reason was to protect from
> the sun or from nicks from rocks flying up ect. If I leave my
> unprotected board on the top of my car for 2 weeks is it likely to
> suffer damage from the sun?

It's really a question of internal pressure, not UV damage.  Some bags
are made with a white or foil surface to reflect the sun, but it's
really for long exposure on the beach in  hot tropical suns.  Greg
Lohr who introduced glass boards also had a reputation in Fla. for
making boards that would explode when left in closed cars in the sun.
You run a much better chance of damage leaving your board inside a
closed car than on the roof.  Today's boards are made with vent screws
which can relieve internal pressure so white board bags have been
discounted in most shops in North America.  When I recently bought a
used glass board which has no vent screw, however, I also bought one
of these white board bags.  Basically a bag protects from handling
damage, but it can also pretect from the road damage you cited.
However, I wouldn't worry about UV damage.

 
 
 

UV damage to boards?

Post by Tsunam » Thu, 02 Aug 2007 22:45:11


Quote:
> I know that UV is not good for sails but was wondering about its
> affects on boards.  I see a lot of cars come to the launch in bags on
> the top of cars and was wondering if the reason was to protect from
> the sun or from nicks from rocks flying up ect. If I leave my
> unprotected board on the top of my car for 2 weeks is it likely to
> suffer damage from the sun?

If you have a new style board which is painted epoxy, then no. No UV will
get thru the paint obviously.... the paint will degrade eventually but the
integrity of the board will not suffer.

Older fibreglass boards may, but it would take a while.

The bags are more about impact protection.
If you see a bag with silver film on it, you may think it is to stop UV: is
isn't.  It is just to keep the boards cool as heat *can* damage epoxy
boards.

 
 
 

UV damage to boards?

Post by quadzill.. » Thu, 02 Aug 2007 23:28:28


Quote:
> I know that UV is not good for sails but was wondering about its
> affects on boards.  I see a lot of cars come to the launch in bags on
> the top of cars and was wondering if the reason was to protect from
> the sun or from nicks from rocks flying up ect. If I leave my
> unprotected board on the top of my car for 2 weeks is it likely to
> suffer damage from the sun?

Bad idea to leave board strapped on top of car for extended periods of
time or even expose board to direct sun and heat of car parked in a
asphalt parking lot as well during hot summer days. UV DOES damage
everything and the more exposure, the quicker the paint or plastic
deteriorates. Summer heat and high parking lot temps will cook your
board up on top and break down the epoxy and resins inside. So,
bottomline to get the most life out of your board is to get it off the
top as soon as it is transported and put it inside or in the shade.
 
 
 

UV damage to boards?

Post by Brian Sangeorza » Thu, 02 Aug 2007 23:33:13

Epoxy paint is not as resistant to UV as is the polyurethanes used on cars.
That said, I believe there are some marine epoxies that have UV inhibitors.
But as Tsunami says there can be a significant difference in the board
temperature - exposed as compared to in a foil board bag.  I put two boards,
side-by-side, bottom (white)side up, in the sun here in Michigan (it would
be much worse in FL).  One was in a padded, foil board bag.  I placed
thermocouples on both boards and saw a significant skin temp difference - ~
40 F as I recall.  Not too scientific, but you get the picture.
The other thing is that I've seen a number of people damage their boards,
sometimes cars, putting them on or taking them off their roof racks in the
wind.  Saw a guy just a few weeks ago smash the tail on a new board.  Sounds
lame, but it just takes a second when you're tired after a long day.
Brian


Quote:



>> I know that UV is not good for sails but was wondering about its
>> affects on boards.  I see a lot of cars come to the launch in bags on
>> the top of cars and was wondering if the reason was to protect from
>> the sun or from nicks from rocks flying up ect. If I leave my
>> unprotected board on the top of my car for 2 weeks is it likely to
>> suffer damage from the sun?

> If you have a new style board which is painted epoxy, then no. No UV will
> get thru the paint obviously.... the paint will degrade eventually but the
> integrity of the board will not suffer.

> Older fibreglass boards may, but it would take a while.

> The bags are more about impact protection.
> If you see a bag with silver film on it, you may think it is to stop UV:
> is
> isn't.  It is just to keep the boards cool as heat *can* damage epoxy
> boards.

 
 
 

UV damage to boards?

Post by wtrplne » Fri, 03 Aug 2007 01:49:26


Quote:

>> I know that UV is not good for sails but was wondering about its
>> affects on boards.  I see a lot of cars come to the launch in bags on
>> the top of cars and was wondering if the reason was to protect from
>> the sun or from nicks from rocks flying up ect. If I leave my
>> unprotected board on the top of my car for 2 weeks is it likely to
>> suffer damage from the sun?

> Bad idea to leave board strapped on top of car for extended periods of
> time or even expose board to direct sun and heat of car parked in a
> asphalt parking lot as well during hot summer days. UV DOES damage
> everything and the more exposure, the quicker the paint or plastic
> deteriorates. Summer heat and high parking lot temps will cook your
> board up on top and break down the epoxy and resins inside. So,
> bottomline to get the most life out of your board is to get it off the
> top as soon as it is transported and put it inside or in the shade.

All plastics, to varying degrees, are sensitive to UV exposure.  Painted
epoxy boards are probably the least affected by sun exposure, unpainted
polyurethane boards the most affected, and thermoformed plastic skin boards
somewhere in between.  Damage from heat will cause more immediately apparent
damage, but UV will do it's work over time.

Bottom line is that heat and UV are bad for your gear and exposure to either
should be kept to a minimum.

Alan
Formerly of The Water Planet

 
 
 

UV damage to boards?

Post by Tsunam » Fri, 03 Aug 2007 10:17:09


Quote:
> snip>
> The other thing is that I've seen a number of people damage their boards,
> sometimes cars, putting them on or taking them off their roof racks in the
> wind.  Saw a guy just a few weeks ago smash the tail on a new board.
Sounds
> lame, but it just takes a second when you're tired after a long day.
> Brian

Actually fuuny you mentioned that last part. I dinged a couple of boards
trying to put them on the roof. It is very very hard in 35kn winds!!

Now just have a car big enough to carry 3 boards, 2 masts and 6 sails that
seem to live in their permanently all summer.
236cm long EVO's help in that regard also.

 
 
 

UV damage to boards?

Post by (PeteCresswell » Sat, 04 Aug 2007 02:49:57

Per cosmicharlie:

Quote:
>Greg
>Lohr who introduced glass boards also had a reputation in Fla. for
>making boards that would explode when left in closed cars in the sun.
>You run a much better chance of damage leaving your board inside a
>closed car than on the roof.  Today's boards are made with vent screws
>which can relieve internal pressure so white board bags have been
>discounted in most shops in North America.

When I bought a semi-custom Pro-Tech, the board came with a note
from John Parton to the effect that his boards can survive trips
to/from the beach just fine without a bag and that a bag
increases the risk of heat/pressure damage.
--
PeteCresswell
 
 
 

UV damage to boards?

Post by wind.s » Sat, 04 Aug 2007 07:02:10



Quote:
>When I bought a semi-custom Pro-Tech, the board came with a note
>from John Parton to the effect that his boards can survive trips
>to/from the beach just fine without a bag and that a bag
>increases the risk of heat/pressure damage.

I bet that was pre-vent screws and I suspect that's not the case
anymore. Your thoughts?
 
 
 

UV damage to boards?

Post by (PeteCresswell » Sat, 04 Aug 2007 08:11:03


Quote:
>I bet that was pre-vent screws and I suspect that's not the case
>anymore. Your thoughts?

This one had a vent screw.  I think John Parton had a strong
sense of pride in the quality and durability of his boards'
construction.

I asked for (and got...) a regular surfboard fin box on the
board.   As an afterthought, I phoned him up and asked him if it
would be strong enough for the intended use (16" slalom fin, 220#
rider).

To make a long story short, I should *not* have asked such a
question of him.
--
PeteCresswell

 
 
 

UV damage to boards?

Post by the principa » Sun, 05 Aug 2007 16:47:39

The quality of Parton's work shall remain unquestioned. His note about
not bagging I always felt meant this.

"Look dude you drive thousands of miles with plastic headlighs and
glass exposed to flinging rocks, those things last fairly well, and my
boards are stronger. So go sail hard put the board on the racks in the
proper way, no straps cutting rails, (Parton had sharp rails) get
home, love your wife and family, have a beer, eat well and sail
tomorrow. Grinding sand in a bag, can do damage too. DO what you think
is best"

I always feel that unbagged is better, unless a whole bunch of other
gear is banging against the board. which is hard to understand and
results in rash. In fact I have a trailer and often strap a bare board
to the car racks just because it is so much gentler to the board. UV
and vent screws are not issues. Texas heat may be different because at
somewhere above 140 degrees Epoxy starts to change, but in general as
long as the interior pressure of the board is set via vent***"as
hot" or "as cool" additional heating on the roof is not gonna hurt.
Now, lay a garbage bag on your board in direct sunlight...that is a
different thing.

OR

close the vent in Alaska at -40 and 4 days later sit in Walmart
Parking lot Corpus  Christi you may want to vent your board. (do it so
you can bring a pound of water back to Alaska inside your board.
Timing is everything)

UV can kill raw resin
Paint or gelcoat is an impervious barrier to the stuff underneath,
although sometimes sacrificial. EVA will fade and accesories will
degrade in UV, so do we. Use the same prudence.


Quote:

> >I bet that was pre-vent screws and I suspect that's not the case
> >anymore. Your thoughts?

> This one had a vent screw.  I think John Parton had a strong
> sense of pride in the quality and durability of his boards'
> construction.

> I asked for (and got...) a regular surfboard fin box on the
> board.   As an afterthought, I phoned him up and asked him if it
> would be strong enough for the intended use (16" slalom fin, 220#
> rider).

> To make a long story short, I should *not* have asked such a
> question of him.
> --
> PeteCresswell

 
 
 

UV damage to boards?

Post by cosmicharli » Sun, 05 Aug 2007 20:53:21


Quote:
> Per cosmicharlie:

> >Greg
> >Lohr who introduced glass boards also had a reputation in Fla. for
> >making boards that would explode when left in closed cars in the sun.
> >You run a much better chance of damage leaving your board inside a
> >closed car than on the roof.  Today's boards are made with vent screws
> >which can relieve internal pressure so white board bags have been
> >discounted in most shops in North America.

> When I bought a semi-custom Pro-Tech, the board came with a note
> from John Parton to the effect that his boards can survive trips
> to/from the beach just fine without a bag and that a bag
> increases the risk of heat/pressure damage.
> --
> PeteCresswell

Nothing in that note mentioned leaving the board in a closed car in a
Florida parking lot for hours did it?  Reading your quote I would say
that he only thought a bag was worse if you kept the board in a bag in
or on a car during transit.  If you leave the board out on the
tropical beach for hours,  a white bag might keep it cooler.  However,
the only reason I bought a bag was to be able to carry two inside  my
beach wagon along with all the other gear.  Since buying the older
glass board (used but in great shape for something like that), I
already damaged the skin by hitting a blunt object.  Before junking my
Pro Tech, it had been repaired so many times it looked like it had
been to hell and back.  White bags basically are on sale because they
aren't needed anymore and are a *** to keep clean.