Laminate GFK pond in 21 steps

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GRP ponds are very durable, they are probably the most stable ponds ever. Condition is that the underground stops. Basically, GRP ponds can be designed in any shape. So the pond can be designed very close to nature. However, these ponds have two disadvantages, they are expensive and the procedures are very complex. But who wants to have a good and dense pond for decades and would like to save a lot of trouble with leaky films, which is well advised with a GRP coated pond. You can have the pond fitted by a professional in the garden, but try it yourself.
fiberglass coating
Epoxy resin in combination with glass fabric and polyester resins in combination with glass mats are suitable as fiberglass.

  • Epoxy resin is solvent-free, low odor and extremely water resistant. Another advantage is that the mass adheres to many different substrates. However, this resin takes a long time to cure properly and it is significantly more expensive. Also, the glass fabric to use is more expensive.
  • Polyester resin is easy to work with, inexpensive and also very durable. It is faster to process and is often used for garden ponds.
Preliminary work
  • (1) Lift the earth!
  • (2) Loose earth must be strongly attached!
  • (3) introducing a thin sand bed.
  • (4) Instead of plastering the sand bed, plaster mortar can be used, especially on steep surfaces.
Lay out foil and laminate
  • (5) Lay the surface with polyester foil (0.2 mm)!
  • (6) No foil is required on plaster surfaces.
  • (7) The substrate must be dry!
  • (8) Laminate the first glass mat - take pieces of about 1 x 1 meter or slightly smaller, place them on the foil and soak them with resin!
  • (9) The resin as a hardener must be dosed very accurately! It's best to weigh it down.
  • (10) It is favorable to use plastic buckets.
  • (11) Mix the materials well!
  • (12) Do not mix more than can be consumed in the next 20 minutes!
  • (13) Roll out all air pockets cleanly! The mats must be well soaked!
  • (14) How to proceed piece by piece with the whole pond
  • (15) The tools must be washed out in styrene in between
  • (16) Hardening takes 3 to 5 hours. Better to let everything dry overnight.
  • (17) Where bubbles have formed, sand the area, even where sand is protruding on the resin or on the fibers!
  • (18) Additional layers are applied. Usually 2 to 3 layers are enough.
  • (19) The conclusion is a layer of glass mat 225 g / m², which is impregnated with black dyed resin. The final layer (225 g / m²) has a smoother surface than the normal 450 mats.
  • (20) Grind uneven areas or sharp bumps!
  • (21) At the very end, the pond is painted with black dyed resin.
You can create a GRP pond yourself, but must pay attention to an extremely solid ground. Depending on the size of the lamination may take. Smaller ponds are created in one day. Although the materials are expensive, but the issue is worthwhile.
Please note:
  • The raw resin sticks terribly!
  • Take care when handling the hardener! Be sure to follow the instructions for use!
  • Glass fibers also stick and itch!
  • They also spread quickly in the garden, then you have a long time of it!
  • Only work with gloves, boots, work overalls etc.!
  • Resin can rise in the head. Nausea, burning eyes and itchy skin are not uncommon.
  • Do not smoke!!!

Video Board: How to Repair Fiberglass.

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