How to Clean Your Roof

2 great options for DIY Kiwis - Save money and time!


Wet & Forget® 5L Concentrate or Rapid Application® 

Will not damage your roof in any way.  These 2 products are non acidic, non-caustic and contain no bleach!  
Safe on all roof surfaces such as:   Decramastic, Clay tile, Concrete tile, Super 6, Fibrolite, Colour steel, Zincalume (iron roof) polycarbonate

You cannot use regular Wet & Forget® 5L (blue) with the Rapid Application® Reach Nozzle. It will NOT work!

  • The active ingredients are the same but the dilutions are different.
  • Coverage of 100-300mis exactly the same for both products.
  • Common coverage is about 100-150m2 as it is most commonly used on ‘absorbent’ porous surfaces (rather than painted non -porous surfaces.)

Helpful Hints:

  • Total saturation of the surface with this product is essential in order to obtain a good kill of the fungi, algae, lichen, moss & algae which
    infests these surfaces.
  • Make sure the surface is dry in order to get the best penetration of the growth with the least amount of evaporation.
  • If the surface is particularly bad, another application approximately one month from the first application.
  • Then allow the surface to weather naturally and nature will take its course. The growth decomposes while the rain gently removes them
    from the surface over time.
  • After 1st application use as a maintenance tool. Only re-apply at the first sign of regrowth.

How To Remove Lichen on Roofs 
Use either Wet & Forget® 5L Concentrate or Rapid Application® (using the new Reach Nozzle)

Getting Rid Of Lichen on Roofs

  1. Visually, section your roof off into areas.
  2. Spot spray the lichen within each section.
  3. Leave for 15-20 mins (while it is still damp)
  4. Then respray the lichen and the entire roof area of that particular section to ensure the plant absorbs the Wet & Forget thoroughly.
  5. The first application is to dissolve the waxy surface. The 2nd spray will then penetrate into the roots.

How to Clean Your Your Roof Using
Rapid Application

  1. Attach your hose, turn to ON and off you go!
  2. No mixing! No measuring! No mess!
  3. Choose a cool, dry day to apply it.
  4. Saturate the dry surface you are cleaning with the Rapid Application®
  5. NO rain for the first 5 hours - Then, just watch it come cleaner - bit by bit

     Roof Cleaning with Rapid Application Reach Nozzle

    How to Clean Your Your Roof Using Wet & Forget®

    1. Mix it up 1 to 5 in your garden sprayer. Choose a cool, dry day to apply it.
    2. Saturate the dry surface you are cleaning with the Wet & Forget
    3. NO rain for the first 5hours - Then, just watch it come cleaner - bit by bit
    4. Only one application! (except in extreme cases of heavy contamination)
    5. You can use it safely on ANY exterior surface because there is NO BLEACH in our product
    6. NO BLEACH means an unlimited shelf life
    7. Contains a special surfactant to give a more even dispersal. Helps product grip onto vertical surfaces

    If you are on Tank Water

    1. Disconnect the water supply to your tank for at least 2-3 weeks to avoid any chance of contamination
    2. You need 36ml of rain or 6 good downpours before you reconnect
    3. Check before reconnecting that the water is NOT foaming.