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Install A New Trampoline on your Multihull

Install A New Trampoline on your Multihull
from ALL AT SEA Magazine by Etienne Giroire.


Catamarans are becoming more and more popular and with good reason. However, as a sailmaker I am often appalled at just how badly installed the between-hulls trampolines are. After many installations, I have learned the important points of safely installing a trampoline.

First, let's take a look at materials. Dyneema® is great but it's overkill, very expensive, and too often sloppily installed with ragged edges. In my experience, a polyester / polyamide / polypro knotted or knitted net properly installed will give the boat owner a firm platform to stand or lounge on. Knitted nets, with their smoother finish are more comfortable than knotted nets, which are favored for heavier work such as found on charter boats, day charter boats and diving.

I prefer nets with rope edges rather than those that come with grommets already sewn in. Metal grommets can chafe or cut the rope used to secure the net to the boat, and since the grommets are usually punched at set increments, the net is not as flexible to install. When the net can be fastened anywhere around its edge, it is easy to match the hardware on the boat.

Multihull nets are manufactured 10% smaller than the space they fill, which implies that it will have to be stretched out in order for it to fit correctly. Anyone who has installed a trampoline, knows that it is hand-tearing, blister-making, back-breaking work. This could explain why so many trampolines are attached to the boat with an uninterrupted line, woven in and out, which is quick, but will never achieve the tension required to get a firm and pleasant feel. It is also unsafe, as the single line will eventually chafe through, leaving gaping holes on the side of the net.

The best way to fasten the net to the boat is with independent lashings, one by one, which acts as a 3 to 1 purchase that will be tightened several times in the process (see photo #1).

Photo 1
Install A New Trampoline on your Multihull


The line I favor is 3/16in (6mm) covered polyester. Lashed three times around, once pulled and locked, it offers 18 x 3/16in (1 1/8in) of polyester tying the net to the boat per lashing. With a spacing of one every five inches, all the way around the net, that's a lot of polyester which, when tightened, leaves no room for chafing.

The tools needed to install a net are gloves, pliers, fid, hot knife, a piece of scrap wood on which to cut the polyester, lots of water and the will to do it.

First, get the corners where they should be, because they are the starting point of the lashings.

Photo 2
Install A New Trampoline on your Multihull


Next, and starting from the corners, make one lashing at a time, and then go back to tighten some more until the edge of the net is one inch away from the attachment point, that being a slide, pad eye or mushroom post.

You also might want to wet the net as this helps with the stretching.

I always finish the lashings with two hitches all the way around and then a flat knot melted with the hot knife to make sure that it can't come undone.

Contact Etienne at this web site. See the Multihull Net page for more info.

Latitude 38 Magazine Cover

ATN Tacker
Perfect illustration of flying the spinnaker with the ATN Tacker by Latitude 38 Magazine.
The ATN Tacker makes flying the spinnaker easier and safer. Thousands sold!

New! Architectural Nets
ATN Architectural Nets>


New! Multi Awning - Forward Awning for Multihulls
Heavy Duty, 5 Year Warranty
Forward Awning for Multihulls


New! Soft Spinnaker Sleeve
for Boats Over 55'
Same Action, Same Price!!
Soft Spinnaker Sleeve


The great Schooner "Meteor", 50m Huisman, off Newport, RI,
using the ATN Spinnaker Sleeve on their 9,000 sq. ft. Gennaker
ATN Spinnaker Sleeve


Another Architectural Application
of an ATN Multihull Net in Bahrain
ATN Multihull Net Architectural Application


Showing the ATN Mastclimber to Loick Peyron and Christian Fevrier
on the 40' trimaran "Happy", getting ready for the 2014 Route du Rhum
ATN Mastclimber Route du Rhum

Deliverying an ATN Spinnaker Sleeve to Loick Peyron, on his 40'
Walter Greene "Happy", getting ready for the upcoming "Route du Rhum".
ATN Spinnaker Sleeve Route du Rhum

ATN announces a new and improved Spinnaker Sleeve. The new Spinnaker Sleeve has a soft mouth opening to facilitate raising and lowering the spinnaker with no chafe and with less weight and easier stowage. See more on the Spinnaker Sleeve page.

Spinnaker Sleeve New from ATN


ATN announces a new product, ATN Multihull Nets/Trampolines. These Multihull Nets and Trampolines come in two styles for Cruising and Racing. More Multihull Nets/Trampolines information.

Multihull Nets
ATN Multihull Nets

ATN Mastclimber Review

Please visit the link for the online magazine review Tried and Tested from Yachting Monthly magazine.

See the ATN Spinnaker Sleeve on the 1930 J Boat "Shamrock V" under way.



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Click for a review of the new ATN Dorcap by
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