Cement Roof

Cement Roof Restoration in Melbourne by Guardian

A cement roof tile is a very versatile and robust roofing material. They are designed to become stronger over a period of time. The only problem with this theory is that as the roof tile hardens, the paint on the surface fades and becomes non-existent. Without an adequate surface covering such as a good quality roof paint, the tile is exposed to extreme conditions. The sun’s UV rays does a great job of breaking down the roof tiles surface. Once the first few layers of roof coating has penetrated, the concrete roof tile will begin to degrade. The heat and the cold expands and contracts the tile, causing random cracking and chipping and accelerated shifting of the cement under the ridges. When a concrete roof tile is restored and is kept in good condition, the sun is reflected. The tile remains at an even temperature and will not expand or contract. The roof coatings are also sprayed on the flexi point which protects the ridge capping, valleys and gables.


This results in an extra UV protected barrier that will not need re-bedding much longer than the ten year warrantee we offer. Sometimes, a cement roof tile will require another roof coat. This would mean 4 coats in total. If your roof tile is porous (commonly atlas tiles and roof tiles that have been left un-maintained) then you will need 4 coats of roofing paint. The first coat we use in this case is called a high build or a filler product. This application is used to soak in and fill all the tiny porous holes of the roof tile. It evens out the surface and prepares it for the next 3 coats (primer and two top coats).


We say that in general, most cement roof restorations or substantial roof maintenance should be carried out every 8 – 15 years depending on the overall condition of the roof.


Once a cement tiled roof restoration is completed and the ridge capping pointed accordingly, the roof will be in prime condition for many years to come. As the time approaches to restore the roof again (usually about 8 – 15 years later) the process will have been much easier and a lot less expensive this time around. The roof will require minimal work, only a light pressure clean, small repairs to ridges and a basic primer and two top coat paint finish.


Another approach to cement roof restoration is to have a heat resistant roof coating applied. Heat resistant roofing products have been on the market for some, but in recent times have drastically improved in quality. Substantially more expensive than standard roof coating, it is worth considering for the following reasons;


  1. Your house is constantly hot. You have air conditioners that are always running in summer and you want to lessen their use and save on power bills.
  2. The heat resistant paint can also work in the reverse fashion in winter. The special coating can trap the heat in your roof. This will ensure that your house stays that little bit warmer during those cold few months of the year.
  3. You would like a longer lasting glossy finish to the roof. Roof restored with heat resistant paints tend to retain their glossy finish for longer. The glossy finish is the metallic pigments in the coating that reflect the sun’s rays. It is therefore wise to keep the surface cleaned so that its job at reflecting the sun continues with optimum results.
  4. Heat resistant roof paint will add years of life to your roof restoration. Because the paint is much better quality, the surface cannot be deteriorated as easily by the sun. Also the heat resistant paints are applied a little thicker, so you have a thicker barrier to break down.

There are many brands of heat resistant paint on the market currently. Some of the better products are;


  • Dulux Acrytex
  • Nutech NXT Cool Zone
  • Coolshield Solar Coat

There are other brands available that will also do the same job. Just do some research and find out whether they are the right product for you. Typically we recommend that a lighter colour is chosen for premium cooling results. While in colder areas, it would be wise to choose a darker colour to retain the heat.

Keeping a cement tiled roof well maintained and restored makes sense and if done properly, saves the need for any substantial future maintenance and makes subsequent cement roof restorations so much easier and lighter on your pocket.


***Click on the link below for a video demo on the benefits of pressure cleaning.

Guardian Roofing Pressure Cleaning Tips

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