Looking for the Best Residential and Commercial Roofing Company in Thomasville
We believe that a roof is the most integral part of a home. It’s what holds your walls together and keeps your house, your possessions, and your family safe and secure.
The Difference Between Asphalt Shingles and a Composition Roof
In Australia, roofing materials usually fall into one of two possibilities: concrete roof tiles; or corrugated metal roofing with a bonded paint finish (known in Australia as Colorbond, or CB). Which option is best for your situation? Both will keep the weather out, so weigh up the factors below before you decide.
A Bit of History: The concept of bonding paint to a galvanized base originated in Chicago, and was further developed in Australia into a product that has remarkable corrosion resistance and is aesthetically interesting: Colorbond©. It comes in many standard colours and is resistant to the elements. Whereas a galvanized corrugated roof might last 20 years, a Colorbond roof would have a 50 year life or longer.
Terra cotta tiles are also an option; they literally last forever. Think archaeological dig. There are examples of terracotta roofing that have been around for 1000s of years. However it is about double the price of a concrete tile roof.
For our purposes, we will compare concrete roof tiles and Colorbond roofing, and will focus on Melbourne conditions. Both products do an admirable job at what they're designed for (keeping the weather out). Concrete roof tiles have been used in Melbourne for at least 75 years and there are many houses in older suburbs such as Heidelberg and Camberwell that still have their original concrete tile roofs.
Why would you select one product over another? It comes down to personal taste, lifestyle, a few other factors... and COST.
Architectural Merit: This is a personal matter. Colorbond has a modern stylish look with clean lines. However, there are many concrete roof tile profiles that give a different architectural result than a standard half-pipe tile. For a small addition in price, you could (for instance) select a flat shingle style. There are also many colours in concrete roof tiles.
Noise: This is an important consideration. Insulation and ceiling notwithstanding, you will hear rain on a Colorbond roof. While we might think of raindrops falling on a metal roof as a pleasant sound, it can be disturbing to some people, especially in heavy downpours. Tile roofs are much quieter.
Water Collection: If you want to collect roof water in a tank for household use, Colorbond is the best option. You will harvest more water because concrete tiles have a level of absorbency. Also they tend to retain dirt, dust and so forth which washes into the water tank. During the recent 10 year drought in Melbourne, home owners were encouraged to collect rain water for household use. This influenced the demand for Colorbond roofing.
Weight: Colorbond is a fraction of the weight of a concrete tile roof (10% to be precise!) So your roof framing can be much lighter. Also, a Colorbond roof is no heavier wet than dry. A concrete tile roof will absorb water before it runs off, so a wet tile roof is heavier and engineering specifications need to allow for this.
Rodents: It is simpler to make a Colorbond roof pest-proof by nature of the way the product is installed.
Bushfire: Melbourne is a city adversely affected by summer bushfires. If you are building in the outlying fire-prone areas, BAL (Bushfire Attack Level) regulations will make it in your interest to choose a Colorbond roof, as they are easier to seal against external ember attack.
Resilience: If you need people to climb on your roof for maintenance reasons, Colorbond is more resilient. However, if you need to penetrate the roof (for instance for a vent or air conditioning) this will be more expensive with CB.
Eaves or Veranda. If you have extensive verandas or eaves, a Colorbond roof will be more desirable because of its lighter weight. With verandas you want a shallower roof pitch, and this can only be achieved by some form of sheet roofing. Typically roof tiles are not recommended on a roof pitch of less than 20 degrees. And because Colorbond is a descendant of old-fashioned corrugated steel, this delivers the traditional Australian veranda look.
Cost: Concrete tiles are over 20% cheaper than Colorbond, which is why more than 90% of homes built in Melbourne have a concrete tile roof. The advertising might have you think that CB is as cheap as tiles, but this is not the case. Designers sometimes prefer Colorbond. One client paid to have plans drawn up by a designer. When seeking quotes, they were horrified to see thousands of dollars extra for a Colorbond roof, when they actually preferred a traditional tile roof.
Which roof is best for you? Look at each factor as it relates to your situation. Weigh up its degree of importance, and then decide which roofing material best serves your particular needs, tastes, lifestyle, and budget.
How To Stop Roof Tiles Being Blown Off
Corrugated Iron Roofing is durable, lightweight and easy to install. If a few extra precautions are taken with handling and fixing, the finished product will greatly be improved.
Over half of the mistakes made while constructing a corrugated iron roof can be traced back to incorrect storage or handling. The iron has to be handled and stored correctly because the surface is very easily damaged.
Leave the metal roofing at the manufacturers until you are ready to start installing it. Aim for delivery the day before roofing starts. If the roofing iron arrives before you are able to fix it, you must ensure it is kept bone dry. It is a common mistake to assume that because they are roofing sheets, they can withstand moisture. If the roofing sheets are stacked together and they get wet, they will stain. White rust forms on the coating and it is very difficult to remove. If your roof sheets do get wet, separate each individual sheet. Use bearers to allow airflow around the metal. This will prevent the corrosion.
Gently does it
As for handling, care needs to be taken in order not to damage the paintwork. Sliding sheets across one another will damage them. When separating the roofing sheets, you should lift them cleanly upwards without scratching the one underneath.
Spend more money
Installing a roof can be time consuming and costly. The last thing you need is to have to keep spending money on maintenance. If you scrimp on the cost of fasteners you will forever be replacing loose nails and fixing leaks. Choose good quality roofing screws. These will provide a more secure fixing and last as long as the roofing iron. It's important not to over tighten the screws. Just tight enough to lightly compress the neoprene washer is sufficient.
If you pre-drill the holes for your roofing screws on the ground, it will be safer and give the roofing a neater appearance. This is only possible if the purlins run parallel to the eaves and the roof is reasonably square.
Using a quality drill bit makes the job easier. The drill bit should be slightly larger than the diameter of the roofing screws. This will prevent stress fractures as the sheets expand and contract.
Take accurate measurements of the purlin centres from the eaves and mark the roofing sheets ready for drilling the screw holes. Don't forget to add the drop into the gutter to your measurements, usually about 50mm. It's better to use chalk for marking corrugated roofing iron because pencil may damage the surface.
Cut to the quick
Cutting corrugated iron roofing sheets with a disc cutter makes the job easier and faster. Unfortunately, it also damages the roofing iron beyond repair. Hot particles of steel imbed themselves into the surrounding metal allowing it to corrode. Nibblers will do the job adequately as long as you are careful with the swarf. It's preferable to cut the sheet with hand shears or best of all power shears. A better finish can be achieved if you make two cuts. The first cut 50mm away from your finished edge allowing you to neatly trim to the line with your second cut.
If you find scratches on your roofing during installation resist the urge to paint it. The paint may well look like a good match from the tin, but after a couple of seasons weathering the patched paintwork will stick out like a sore thumb. Contact the manufacturer and ask for advice on making repairs to their product.
Laying the roofing
Before you start laying the roofing sheets check that the roof is square. If the roof is not square you can still achieve a good finish if you even out the difference, between the two barges. The difference will then be less noticeable as it will be covered by the barge flashing. Run a string line along the eaves, 50mm into the gutter and it will provide you with a straight edge for the roofing sheets.
On completion it's important to clear the roof of any loose swarf. Tiny particles of iron left on the roof will rust and ruin the surface. A soft brush will do the job or ideally a leaf blower can be used.
A well installed corrugated iron roof will give years of maintenance free service. If you take a little extra care with the preparation and fixing, you will achieve a superior finish.
Roofing is one of the most important investments you can make. Improper, aged or substandard roofing can lead to a host of other more expensive problems. If you are selling your property, a well-chosen roof can yield a solid return on your investment. Whatever your budget or design desires, whether you want architectural shingles, tile roof installation or something in between, a Roof Master consultant will work with you to make it a reality.
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