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Frequently Asked Questions

  • No, council approval is not needed to replace a roof as long as there is no structural changes to the building.
  • Will I need to vacate my premises while the roof is being replaced?
  • No, there is no need to vacate whilst your roof is being replaced. We remove and replace each roof side as we go so that your home is never exposed to the elements and is secure for you to remain in.
  • There should be no disruption to your day. Once you give us the go ahead, we book a start date with you and ask for permission to access your roof without you being home from the front of your property.
  • 10% deposit is required for all roofing jobs over $1000.00. A further 40% is due upon delivery of materials and the balance is due on completion of the job.
  • The cost of a metal re-roof will vary depending on the size of the building, the design and pitch. We will get up on your roof to do an accurate measure and quote.
  • Custom Orb roof sheets are probably the most common profile used on domestic housing and when most people think of Colorbond roofing, they think of this corrugated profile. Although it is very popular, it is not suitable for all kinds of roofs and to be warranted by Bluescope Steel, its application needs to meet certain standards.
  • These standards are:
    • It cannot be used for a roof with a pitch of under 5 degrees
    • Depending on the BMT of the sheets used, there are specific batten spacing requirements

Trimdek roofing has bold trapezoidal ribs and subtle fluting in the pans and is fixed with screws. This profile of roof sheeting is for roofs with a pitch of 2 degrees and above.

  • Kliplok roof sheets have a strong rib rising from flat pans with longitudinal fluting, offering long, straight lines for crisp and clean finish. This profile sheet is suitable for roofs with a pitch of over 1 degree and is fastened using concealed clips and is ideal for those flat roofs. It also allows for wider batten spacing.
  • Colorbond steel roof sheets come in various thickness’ and this will be referred to as its base metal thickness (BMT) which measure the thickness of the raw steel. Thickness of sheets range from 0.42bmt to 0.80bmt
  • The BMT rating of the sheet is important as it dictates the spans that can be used for support. The higher the BMT, the larger the span between the roofs supports. The higher BMT is stronger and less easily dented or fractured, especially when people are accessing the roof to clean gutters and perform maintenance, eg. flue cleaning, aerials etc.
  • The 2 most commonly used BMT’s for domestic roofing are the 0.42bmt and the 0.48bmt sheets.
  • The 0.42bmt sheets are the base range thickness and the 0.48bmt sheets are a step up from this.
  • Enhance Metal Roofing recommends the use of 0.48bmt Colorbond sheets as they have superior strength compared to the 0.42bmt and are only a fraction more expensive than the 0.42bmt sheets.
  • The 0.48bmt sheets are better value for your money when compared against the 0.42bmt, especially if your roof is accessed frequently or subject to tree branches/debris falling onto it and it will have a longer life span.
  • No matter what BMT you choose, make sure it is the appropriate product for the batten spacing, if the wrong product is used it will jeopardise your roof sheets warranty!
  • Standard Colorbond steel will suit most home designs and locations but there are specialist grades to suit more demanding environments.
  • Colorbond Ultra Steel roof sheets are designed especially for severe coastal and industrial environments where there is salt spray in the air (approximately 100-200m from breaking surf) or where there is the effect of industrial omissions (fumes & particulate fallout about 100-200m from the source).
  • Colorbond Ultra steel is made with Activate technology and factory applied paint systems to cope with exposure to these severe environments.
  • As tile roofs age, they can develop a multitude of issues.
  • Some of the most common issues of an aged tile roof are:
  • The mortar/pointing work breaks down meaning the ridge caps can become loose, letting moisture in and possibly the displacement of the cap in high winds.
  • The tiles become brittle and porous as the glazing has been worn off over many years, making the tile easy to break and also tiles will now start to absorb water instead of repelling it, allowing water to enter the roof cavity – the beginning of water damage internally.
  • Valleys rust over time and roof flashings start to break down.
  • At this point re-roofing becomes the best option and it’s better to do it sooner rather than later, keeping water damage to a minimum.
  • Colorbond metal sheeting has become the most popular choice today for home owners when re-roofing their home. It’s aesthetic appeal, various design capabilities and incredible durability, along with its minimal need for maintenance has made it the product of choice for new, existing and commercial roofing projects.
  • Colorbond roofs are lightweight, exceptionally resistant to extreme weather events, thermally more efficient than tiles and are less of a security risk, as it is difficult to open a section of the roof without the proper tools.
  • The concept of metal re-roofing is quite straightforward, re-roofing involves the removal of the current roofing material and then the installation of a new metal roof to the existing roof frame.
  • Based on a careful inspection and evaluation of your roofing needs, Enhance Metal Roofing will provide you with a detailed plan on how to proceed. In most cases, this will involve stripping down a large part or all of the elements that make up your current roof and replacing them with new materials and framing, or even a completely new roofing system with an entirely different structure.
  • Many people don’t understand the importance of all the steps involved and end up trying to cut costs on their re-roofing project. However, not hiring a licensed, knowledgeable roofing expert can lead to delays, huge expenses and sometimes even the entire job having to be redone completely.
  • This is really a question of what look you are after and your budget. Colorbond has zincalume steel as its base and is then painted with multi-layer, patented methods that have been tried and tested in Australian conditions.
  • Zincalume is a fantastic product but Colorbond is far superior in terms of its durability and look.
  • It comes in a variety of over 20 different colours, from almost white to black.
  • Zincalume has that silver steel roof colour that many people like and it is slightly cheaper, which is why it is used more commonly on commercial buildings with large roofs.
  • Each has advantages and disadvantages and it boils down to individual choice, once all the product specifications have been evaluated by both the customer and roofing contractor.
  • Colorbond roofing weighs less than tiles, so it is a good option for an old roof where the roof or building structure has begun to sag, crack or twist under the weight of the old tiled roof.
  • A Colorbond roof will also tend to tie the whole roof together making it stronger.
  • Colorbond roofing is a more versatile product, which can be used on any pitch and used in all roofing designs from the simple A-frame roof to a complex architecturally designed roof.
  • It easily contains and directs the flow of water off the roof regardless of pitch.
  • Tiled roofs are more susceptible to damage than a metal roof by hail and tree branches as even new tiles can crack and subsequently leak, whereas Colorbond sheets may be dented by these and not penetrated leaving the roof watertight. And arguably, a new Colorbond roof modernises any home new or old!
  • The price you are quoted is determined by the brand and quality of roofing materials used and the experience and skill of the Roof Plumber on the job.
  • Enhance Metal Roofing use only the highest quality roofing materials and suppliers.
  • Colorbond steel products are manufactured by BlueScope Steel and guaranteed for up to 30 years for their quality and suitability to the Australian climate.
  • Our Roof Plumbers are qualified, highly experienced and licensed.
  • Only a licensed Roof Plumber, like Enhance Metal Roofing can cover your roofing
  • Works with the appropriate public liability insurance for the job.
  • The roof over your head is a primary source of protection and security for you, your family and your possessions.
  • Only Bluescope Steel provide you the security of a pre-approved guarantee on materials when used in accordance with their specifications and installed by a licensed Roof Plumber.
  • For COLORBOND® steel, BlueScope Steel offers a warranty against corrosion to perforation by weathering in the natural elements for a period of up to 30 years from the date of installation.
  • BlueScope Steel also warrants that the paint system on COLORBOND® steel will not flake or peel due to natural weathering for a period of up to 20 years from the date of installation.
  • Your new metal roof is virtually maintenance free once installed. Unlike tile roofs where there is a good chance of tile breaking because of hail or ridge capping that has been dislodged in a storm your new steel roof is designed to withstand all weather elements throughout its life.
  • Once your new Bluescope steel roof is installed, you can rest assure that it will still be going strong for years to come.
  • COLORBOND® steel combines the corrosion resistance of a ZINCALUME® steel base with a durable, oven baked paint finish. COLORBOND® is made by taking ZINCALUME® (a Zinc and Aluminium alloy coating) that delivers outstanding anti-corrosion performance and is lightweight, yet extremely strong.
  • A conversion layer is applied to the surface to improve adhesion and then a polyester primer is baked on, followed by a topcoat of specially developed, exterior grade paint which is again baked on.
  • All ensuring maximum resistance to chipping, peeling or cracking.
  • For COLORBOND® steel and ZINCALUME® steel, BlueScope Steel offers a warranty against corrosion to perforation by weathering in the natural elements for a period of up to 36 years* from the date of installation. BlueScope Steel also warrants that the paint system on COLORBOND® steel will not flake or peel due to natural weathering for a period of up to 20 years* from the date of installation.
  • The 36 year* COLORBOND® steel and ZINCALUME® steel for Roofing Warranty only applies providing all of the following conditions are met:
  • Installed pitch of the roof is equal to or greater than 5 degrees above the horizontal.
  • The roof is fully lined and does not contain exposed eaves or other areas sheltered or unwashed by natural rainfall.
  • The roof is located more than 5km from saltwater.
  • All fasteners used for fixing the product to be in accordance with BlueScope Steel recommendations and comply with Australian Standard AS3566: Class 4 where applicable.
  • Warranty terms and conditions apply. Warranties are not available for all products and applications. The duration and terms and conditions of available warranties vary according to product use and application.
  • All coloured materials will change colour when exposed to UV light – the paint finish on your car, the clothes on your line, and so on. When it comes to steel building materials, the extent of colour change is influenced by factors such as the colour itself, the aspect, the design of the structure and the environment.
  • Dark colours are inherently prone to more noticeable colour change than lighter colours. Individual perceptions also come into play. How you see colour can differ greatly to someone else.
  • Using thermally efficient roofing materials like COLORBOND® steel can help reduce your cooling and heating costs. In summer, a lightweight insulated roof made from COLORBOND® steel can assist in minimising the amount of heat radiated into your home at night.
  • Thats because COLORBOND® steel has a low thermal mass, so it cools down fast once the sun is off it.
  • In winter the same steel roof, properly insulated, helps keep the heat inside. Building Regulations for your area will prescribe the level of insulation you will require. The choice of colour can also influence thermal performance. Lighter colours, in particular, radiate less heat during summer.
  • Generally, a metal roof will hold up well in a hailstorm. The roof sheeting will absorb the energy of the hailstone and remain structurally sound. However, indentations may occur along with loss of paint on the topcoat.
  • In most cases indentations from hailstones do not affect the life of a COLORBOND® steel roof. The only causes of concern will arise from:
  • Low pitch roofs with significant hail indentations in the pans. This can lead to ponding and dirt accumulation, which may promote corrosion.
  • Low pitch roofs where sheet overlaps have been significantly deformed. The anti-capillary effect can be lost and water could be drawn into the sheet lap, resulting in corrosion.
  • In the event of ponding due to indentations or damage to sheet overlaps, the affected sheets should be replaced as soon as practicable to maintain the life of the roof. Loss of the paint topcoat arising from impact of hail stones will be an aesthetic issue only and will have no appreciable effect on the corrosion performance of the COLORBOND® steel roof.
  • Temperature variations can cause pierce fixed metal roof sheeting to expand and contract, sometimes resulting in roof noise. This is more likely during rapid changes in the temperature caused by such things as heat from the morning sun, afternoon cooling, passing clouds or gusts of wind.
  • What’s the technical explanation? When movement is suppressed the stress in the sheet builds up and may exceed the frictional restraint. Energy is then released as noise associated with sheet movement. The level of noise depends on the frictional restraint. For most roofs there may be some minor creaking.
  • However, when there is excessive thermal movement and poor installation practice, frictional forces can build up to create loud, sharp cracking noises. Although noise problems are rare, they are usually associated with dark coloured roofs fastened directly to timber. This is due to the friction characteristics of the steel-timber interface (increased noise if the timber is wet) and the fact that darker coloured sheeting is subject to greater expansion.
  • Its been found that the risk of this type of noise can be reduced by:
  • Using an insulation blanket with sarking between the sheeting and timber supports (this also provides heat insulation, a vapour barrier and reduces rain noise).
  • Using steel battens to support the sheeting.
  • Using a reflective foil laminate between the sheeting and timber supports (this also provides heat insulation and a vapour barrier.
  • No
  • In summer a lightweight roof made from COLORBOND® steel or ZINCALUME® steel causes less heat to be radiated into your home because it cools down faster at night. And in winter, the same steel roof, properly insulated, helps keep the heat inside. This can result in reduced cooling and heating costs.
  • Many people enjoy the sound of rain falling on their steel roof. They feel more attuned to nature, or it brings back fond memories of childhood. For those who don’t, rain noise can be reduced by using an insulating blanket. This is placed directly under the roof sheeting to dampen sound vibrations, reducing noise and making for a peaceful environment inside.
  • Some manufacturers do sell roof sheeting made from COLORBOND® steel with a topcoat on both sides.
  • However, colours and styles may be limited so you should confirm availability with your supplier.
  • COLORBOND® steel and ZINCALUME® steel are thermally efficient roofing materials, radiating less heat into your home as they cool down faster at night. Lighter coloured roofs, irrespective of material, reflect more heat than darker shades. The result of this being less heat available to be radiated into your home.
  • To reduce the transmission of heat into a building, insulation can be easily incorporated during the installation of the steel roof sheeting.

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  • It is a smart idea to clean your gutters every time you experience severe weather conditions, but if you can’t commit to that then aim for at least once a year. Like roof inspections, gutter maintenance is something that you can easily outsource to the professionals, like us here at Enhance Metal Roofing.
  • We’ve been installing internal box gutters and external gutters for over 20 years and know how to repair or replace gutters that have rusted, started leaking, been poorly installed or are suffering from general wear and tear.
  • Yes, there are different styles of gutters these include: Box gutter, fascia gutter, square gutter, round gutter and quad gutter.
  • Fascia boards (wood behind gutter) usually rot due to a lack of gutter cleaning and water overflowing over the back of the gutter. In rare cases this wood can rot due to the roof being too short in areas where the rainwater is not making it into the gutter and constantly leaks behind the gutter.
  • If the wood or fascia board, which is the proper name, is rotted it can simply be replaced. We will cut out the rotted section and simply install a new section of same sized wood.
  • There are many reasons gutters need replacement which include, but are not limited to, sagging, off-pitch, crushed, pitted, crushed and wind/storm damage.
  • No, you do not need to be home for the gutters to be installed. Our specialists will have your new gutters up in no time.
  • The roof pitch is important because it ensures that the roof has the proper slope to effectively drain water off both the flashing and the skylight.
  • The frame out size is the width and height of the Skylight. The clearance between rafters must be at least the width of the Skylight, battens are then placed at a distance equal to the height of the Skylight.
  • Bulk insulation mainly resists the transfer of conducted and convected heat, relying on pockets of trapped air within its structure. Its thermal resistance is essentially the same regardless of the direction of heat flow through it.
  • Reflective insulation mainly resists radiant heat flow due to its high reflectivity and low emissivity (ability to re-radiate heat). It relies on the presence of an air layer of at least 25mm next to the shiny surface. The thermal resistance of reflective insulation varies with the direction of heat flow through it.
  • Insulation can be added to existing buildings with varying effectiveness and cost depending on the construction type and where the insulation is being placed.
  • Ceilings with easy access are relatively simple to insulate post-construction while walls and skillion roofs are the hardest to insulate after construction, as the internal or external lining must be removed first.
  • Insulations ability to resist heat flow (prevent heat leaking in or out) is described as its R-value.
  • R-values are the measuring tool we use to rate the level of thermal resistance.
  • Essentially, the higher the R-Value the more effective the insulation is.

There are three main types of heat transfer:

  1. Radiation – these are rays of heat moving through the air.
  2. Convection – occurs when air molecules themselves heat up and move to another location.
  3. Conduction – when heat is transmitted through the materials of your home, such as the roof and walls.
  • Insulation is made up of thin glass fibres that are matted together to form millions of air pockets.
  • These air pockets are very poor conductors of heat and resist the flow of air or radiation through the insulation
  • Anticon combines two very effective forms of insulation into a single product to control temperature and reduce unwanted noise. The reflective foil acts as a barrier, which reduces the radiant heat entering the roof space by up to 97% and also controls condensation, while the insulation blanket absorbs outside noise and dramatically slows the transfer of heat into and out of your property.
  • Keeps homes and buildings cooler in summer and warmer in winter Improves the acoustic performance of your roof by reducing unwanted airborne noise such as aircraft or traffic as well as provide a dampening effect to reduce impact noise from rain or hail.
  • Improves energy efficiency which promotes a more comfortable living environment and reduces energy bills.
  • Reduces the risk of condensation formation under the metal roof which can cause damage to plasterboard ceilings and mould growth.
  • It’s made from non-combustible fibres that are ideally suited to sealing ember entry points at ridges, valleys and fascias to meet the BAL (Bushfire Attack Level) requirements.
  • Reduces greenhouse gas emissions
  • Environmentally sound – made from up to 65% recycled content.

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