Our CF Range can be laid directly over decramastic tiles

Re-roofing over decramastic tiles

After many years of battling the elements your roof may be suffering from wear and tear. If you have a decramastic roof that is showing significant signs of age and degradation or starting to leak, it is probably time to think about looking for a replacement.

Generally, replacing an existing decramastic roof can be an expensive and time consuming exercise with the removal and disposal of the existing decramastic tiles as well as the potential asbestos testing.

But luckily there is another option, Gerard's Concealed Fastening (CF) Shake Profile can go directly over your existing decramastic tile roof.

Get the protection and the look without the cost.

With CF Shake we can lay our tiles directly over existing decramastic tiles.

  • Save Time

    Because this system can be installed in the wet or the dry, this means there will be less weather delays on your project and less time until your new roof is on.

  • Save Money

    With the overlay method there are no additional costs for asbestos testing or roof removal.

  • Less Disruption

    Because your roof isn’t being removed your home is not being exposed to the elements, meaning you can continue to live in your home while work takes place.

  • Safe

    This method of re-roofing keeps asbestos in its dormant, unharmful state and is completed after a strict assessment process.

Get a FREE quote

Free quote

Get a FREE quote

Free quote


Asbestos was used up until 1981, so there could even been some jobs that were installed as late as 1982.

If your roof was installed prior to this, there is a high chance that it will have a small amount of asbestos in it.

If somebody is to re-roof your home, they will first want an asbestos test, if the sample proves to have asbestos present, then you will need a specialist asbestos removal company to remove the existing roof before bringing in roofing company to replace it. For many people this process is too costly. As an indication of costs builderscrack.co.nz estimates that a 130m2 single story house will costs between $11,100 - $18,200 to remove an asbestos roof.  So we have developed a way where we can install a new roof over your existing roof. Protecting your home from the weather, improving the appearance and keeping the asbestos contained in a way that is safe.

Our breakthrough technology in our Concealed Fastening (CF) tiles means that our products are the only ones that can do this and our system has been approved by both the Roofing Association of New Zealand and meets the NZ building code.

CF Technology provides the ultimate in weather tightness and style

Our innovative product range means that every tile is hooked into the next tile and the fasteners are completing concealed and protected from the elements, leading to a streamlined appearance.

  • CF Shake

Find out more

Contact Us

Download a copy of our decramastic tile overlay brochure.