ROOFING FAQS

NEW ROOFING

 

What guarantees do roof tiles have?
Monier roof tiles come with a 50 year guarantee* on the structural performance of the tiles and Monier terracotta roof tiles come with a 50 Year guarantee* on structural and colour performance.

* Refer to terms and conditions of the warranty for details at www.monier.co.nz/Warranties/Default.aspx

What pitch can I put roof tiles on?
Roof tiles can be layed at a minimum roof pitch of 15 degrees; however, consideration needs to be given to the rafter length, wind speed, terrain category and the tiles profile. Further information can be found in our architectural manual LINK here.

What is Sarking and what are the benefits?
Sarking is a flexible membrane that is layed under the roof battens during the installation of a new roof. CSR Roofing recommended the use of sarking for all new roofs irrespective of roof pitch, terrain category or prevailing wind speeds.

Benefits of using Sarking:

  • Reflects up to 95% of radiant heat entering your roof space
  • Provides added thermal insulation all year round
  • Stops condensation - minimising the chance of staining and mould growth on your ceilings
  • Effective dust barrier - reducing airborne dust entering your home
  • Fire safety - prevents burning embers entering the roof space
  • Provides additional weather protection during severe storms

Can Concrete and Terracotta tiles be used in coastal environments?
Concrete and terracotta roof tiles can be used in all kinds of environments and are ideal for coastal locations that endure the wind, spray and salt of the ocean. In fact, Monier and Wunderlich roof tiles are guaranteed not to warp, become porous or rust for 50 years.

Is water collected off a tile roof safe to drink?
The raw materials used to manufacture tiles are non-toxic, so the water that runs off a tiled roof is potable, however, other factors including atmospheric fallout needs to be considered.

EXISTING ROOFING

 

Do concrete tiles fade?
Yes, the colour of your concrete tiles will fade and weather over time. This coating is purely decorative, and plays no role in any protective or waterproofing function. Over several years, the colour coating of your tiles may take on a more subdued, matt appearance because of the effects of air pollution and powerful UV rays from the sun. This change in appearance has no effect on the tiles performance or its structural adequacy.

Do concrete roof tiles become porous as they age?
Concrete roof tiles like all concrete products become stronger and less porous over time, provided they were manufactured to the appropriate Aus/NZ Standard.

Does lichen growth affect the durability of roof tiles?
In some climates, moss and lichen can grow on your tiles. Whilst moss growth will not affect the water proofing performance of your tiles, it can obstruct the channelling of water down your roof. Therefore, Monier recommends the periodic cleaning of moss and lichen with a low pressure water jet.

Leaking roof?
Leaks are most often confined to small areas and usually occur as a result of one or more of the following problems:

  • Blocked gutters (including valley gutters) and downpipes. These should be cleaned out.
  • Cracked or broken cement mortar bedding to the ridge or hip capping. Capping should be re-bedded or re-pointed.
  • Broken roof tiles. Individual roof tiles should be replaced.
  • Roof tiles displaced. Displaced tiles should be put back in their proper position.
  • Blocked drainage channels under the ‘sidelaps’ of individual tiles. Any build up of dirt or debris should be removed.
  • Flashings blocked, damaged or displaced. These problems should be corrected.

If your roof has a leak, it is always best to employ an expert tradesperson to undertake the work for you, as accessing and walking on roofs can be dangerous.

What are the white patches on my roof? How can they be removed?
Occasionally, the natural salts within a concrete tile can migrate to the surface as a whitish grey discolouration called efflorescence or ‘bloom’. This has no effect on the performance of the tile. Although common to many concrete products, efflorescence does not always occur and should disappear naturally over time.

Can terracotta tiles be painted?
The painting of terracotta tiles is not recommended, however, unglazed terracotta tiles can be painted but once painted will require ongoing recoating.

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ROOF MAINTENANCE

 

Do tiled roofs require ongoing maintenance?
There is no such thing as no maintenance when it comes to roofs. Although your roof tiles are structurally guaranteed to perform their function for 50 years, there are still some things to look out for when it comes to caring for and maintaining your roof.

The number one maintenance issue is cleaning the gutters, downpipes and valleys of your roof. Gutters, downpipes and valleys can become easily built up with debris such as leaves and twigs from trees.

When gutters, downpipes and valleys become blocked, you get a build up of water that overflows back into your roof, which can create an enormous amount of water damage. This kind of build up also represents a potential fire hazard, as dry leaves and twigs are extremely combustible. This is easily preventable by a regular check to make sure your gutters, downpipes and valleys are free of debris. You should try to check and clean your roof at least once a year, twice if you live in a particularly tree lined area.

By regularly maintaining your roof you will go a long way to preventing any major problems occurring.

Are roof inspections necessary?
Concrete roof tiles like all concrete products become stronger and less porous over time, provided they were manufactured to the appropriate Aus/NZ Standard.

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