Best Commercial and Residential Roofers in North Carolina
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With over a decade of experience, Armadillo Roofing is a natural choice for all your residential and commercial roofing needs in North Carolina.
We are a seasoned North Carolina roofing company with the skills needed to help you protect your property from the elements in every season.
Whether you are looking for help with new construction or need roof repairs on an older property, your project represents a big investment.
You need to know you are working with a licensed roofing contractor you can trust to provide the absolute best quality work on budget and on time. This is exactly what you get when you choose Armadillo Roofing in North Carolina.
5 Reasons Not to Have a New Roof Installed Over an Old Roof
So you need a new roof and are trying to decide whether or not to try and save some money by having the new roof installed over an existing layer of roofing. This technique is quite common in many areas and many roofing contractors don't see any problem with this method and have no problem trying to sell homeowners on a lay-over or go-over as this technique is called. They are wrong.
5 Top Reasons A Lay-Over Or Go-Over Is A Bad Idea When Re-Roofing
1.) Areas that have or had leaks can't always be addressed properly
There is a good chance that your old roof had some problem areas including possible leak spots, whether you noticed them or not. Without tearing off the old roof and properly identifying these types of trouble spots and determining where the leak was coming from and traveling to it is impossible to tell what areas of your roof may need some special attention.
2.) Any rotted wood under the existing roofing will only get worse
There could be areas that have rotted wood hiding under the old roofing. These rotted areas need to be identified and replaced before a new roof is installed. Obviously if your roofing contractor is only doing a lay-over roofing installation then these rotted areas will remain covered up and only get worse as the years go on. Also the nails holding down the shingles in areas with rotted wood cannot properly do their job and you have a much higher risk of shingles blowing off in those areas.
3.) Eaves, rakes and valleys need special treatment
This is a big one. The eaves, rakes and valleys of your house need special attention when your home's roof is being installed. This is especially important in colder climates like Massachusetts, where we are located. In the winter time the eaves of your house are under attack by Mother Nature, whether it is through ice dams, snow build up, or just the constant freezing and thawing that occurs throughout the winter season. When a new roof is properly installed the roofing contractor needs to put new aluminum drip-edge around the entire perimeter of your roof.
Next they need to apply a 3 foot wide section of ice & water barrier around the perimeter as well as in any valleys on your roof. Then they can begin to install the new roofing. Without tearing off the original roofing there is no way to properly install the new drip-edge or ice & water barrier. On a lay-over type of roofing install, the roofing contractor is counting on the existing products on the home's roof to still be up to par and be able to handle the winter conditions. All too often the old products fall short whether it was because they have outlived their lifetime, were sub-par to begin with, or maybe they were never there to begin with (all to often the latter is the case with ice & water barrier).
4.) Extra roofing weight is no good for old rafters
One of the more obvious problems with a lay-over re-roof is the added weight of the extra layer of shingles. On most newer homes this is not an issue, however many older homes have rafters that are considered undersized by today's framing standards. It is not uncommon to see 2×6 rafter systems on many of these houses. Now in most situations a 2×6 rafter is undersized to begin with and you certainly don't want to be adding the weight of a new roofing layer on top of an old roofing layer to these already undersized rafter systems. With newer roofs using 2×10, 2×12, engineered trusses, etc. the weight isn't always as much of an issue.
5.) Shorter roof life expectancy
Most responsible roofing contractors agree that a lay-over roof will decrease the new roof's lifetime by about 25%. This fact alone means that any money you might have saved by doing a lay-over, as opposed to a tear-off and new roof install, was only a short term savings. In addition, you now have 2 layers of roofing that will need to be removed the next time your roof is done and that will also add more cost to the job
Tear-Off Then Re-Roof Is Always Superior
Well, I just gave you 5 very good reasons to tear off your old roofing and then install your new roof. Yes it can be cheaper in the short term to do a go-over on your old roof, but, in the long term it will cost you more. We never recommend this technique to our customers. We always recommend completely tearing of the old roofing, fixing any underlying problems, then installing a fresh, beautiful new roof that will outlast any lay-over roof as well as better protect our customers' homes.
How to Tell When Your Roof Shingles Are Going Bad
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.
Armadillo Roofing has been a leading full-service roofing contractor in North Carolina for almost a decade, and we are proud to offer our quality services to residential roofing customers in North Carolina.
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We pride ourselves on our excellent craftsmanship and attention to detail. Armadillo Roofing offers custom tile roofs, slate roofs, cedar wood shingle/shake roofs, and other residential roofs in North Carolina.
Call Us today to learn more about residential roofing services in North Carolina.
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