Jump to content
  • Sign in to follow this  

    HDPE Surf Platfom


    Leebo
    • Year: 2007 Brand: Moomba Model / Trim: LSV Cost: $250-$499 Platform Type: Other

    As we added more ballast to my Moomba LSV, the stock swim platform was digging into the wave.  Following the path of others, I sourced a sheet of HDPE that was roughly 40"x60"x1" to make a new swim/surf platform.  I wanted to replicate the look/design of the newer Moomba swim/surf platforms, but I couldn't find a template or sketch online.  So, I went to my local Moomba dealer when they were closed.  Somewhere in their archives of surveillance video is a video my daughter sitting on a large piece of cardboard, as I trace the outline from underneath a Craz platform.

    I actually needed to reduce the width of the cardboard template by 2" so I took 1" off  the edge of each end to keep it proportionate and then cut the cardboard to size.  I drove myself nuts trying to get each edge to be a mirror of the other side and finally called it "close-enuf".  After sketching out the template on the HDPE, I used a circular-saw to make the longer/straight cuts and then used a jig-saw to round out the edges and make the cut along the edge that meets the stern. 

    After everything was cut to proportion, i used a quarter-round router bit to smooth the edges over. When I was done cutting/routing, that white HDPE made it snow in August.

    To mount it to the existing platform brackets, I countersunk a hole and pushed stainless steel carriage bolts from the top down.  I also wanted to raise the level of the platform so I used scrap pieces roughly in the size of the bracket as a spacer.  I then bolted the platform to the brackets using nylock nuts before i put the padding on.

    For the padding, i sourced a sheet of HydroTurf with the 3M adhesive on the back (their 40"x60" sheet was the constraining factor on the size, my HDPE sheet was bigger.)  Rather than cutting a template for this, I just stuck it on the HDPE and then used a sheetrock knife to trim the edges.  Yes, you will cut into the HDPE a little bit but you will never notice it since its at the edge of the HydroTurf.  If anything, I wish I had taken more care in hand-cutting the edges since there are slight variations (tho I may be the only one that notices).  Here's the finished product.  

     439039978_MoombaLSVHDPESurfPlatform.jpg.730fef52f62c706487f5fe45a1eb2f34.jpg

    5B50E99F-8D1C-4EDB-A78D-1F30E67E9A1B.thumb.jpeg.1d96e2516fb2da9252e8ad1cb7741ba6.jpegSome people have used 3/4" HDPE and reported a barely noticeable flex.  If you're ordering HDPE online, this will save a bit, however the best prices can be found if you source it locally.  The shipping is expensive so its worth making several phone calls to "plastics" companies.  I found a place that had a piece of 1" in stock and it was a leftover from a job so it was a lot less expensive.  

    This project was done three years ago and everything has held up well.  The edge of the platform takes a lot of abuse (far better than fiberglass) and the HydroTurf with the 3M adhesive has stuck to the HDPE without any edges pulling up.  I believe the total cost of materials (HDPE, HydroTurf, and stainless nuts/bolts) was ~$500.

     

    Sign in to follow this  


    User Feedback

    Recommended Comments

    That looks fantastic.   Strong work.   I’m surprised we don’t see a lot more hdpe decks... especially with all the diy surf gates.  

    My only hesitation was whether the 3m backed pads would stick well enough.   Shoulds like that hasn’t been a problem... I know the king starboard people told me you can heat treat it first to make a better bond as well.    

    Great work!    

    Share this comment


    Link to comment
    Share on other sites


    Join the conversation

    You can post now and register later. If you have an account, sign in now to post with your account.

    Guest
    Add a comment...

    ×   Pasted as rich text.   Paste as plain text instead

      Only 75 emoji are allowed.

    ×   Your link has been automatically embedded.   Display as a link instead

    ×   Your previous content has been restored.   Clear editor

    ×   You cannot paste images directly. Upload or insert images from URL.


  • Arrow-to-forum.png     Visit the SHOP TALK forums to join discussions on fabrication, design and more