Charlotte Roofing: Article About Installing Metal Roofing
One unique feature of metal roofing systems is that they can be installed right on top of a home's asphalt shingles. When building regulations allow roofers to do so, the addition of the aluminum, galvanized steel, or copper rooftop above the older asphalt shingles can increase the home's R value and lessen problems like air leaks. However, before the experienced Charlotte roofing experts put on the metal rooftop, there are a few considerations to keep in mind.
Switching from asphalt or composite shingles to corrugated, standing seam, or sheet metal is a big decision, and for many property owners, it will likely be the last roof they have to put onto their house. This investment is worthy of careful work and consideration in order to attain the best results. Many homeowners wonder about leaving the old layer of asphalt shingles on the roof and then having the metal installed directly on top of it. When allowed by municipal building regulations, this may be acceptable but only under certain situations.
A home's readiness for metal installed directly on top of asphalt shingles will be assessed by the professional roofers. Venting, condensation, and the roof's weight will all be of concern. A house that is well vented, has just one layer of asphalt shingles, and already has a vapor barrier installed may be a good candidate for this procedure.
The roofing contractors from Southern Home Services of Charlotte NC would be happy to answer questions about windows or fiber cement siding.
Keeping on one old layer of asphalt has benefits such as a lower labor cost and a faster project completion. Leaving on the old roofing materials also helps add some insulation to the roof and may dampen the noise of rain or ice hitting the metal.
However, leaving on the old shingles is not always a good idea. If the roofing contractors suspect that the roof's decking may be damaged due to a past or current leak, the only way to know the extent of the problem is to tear off the old roof. Some roofing trusses and rafters cannot hold up the weight of shingles plus metal. If the roof does not have enough ventilation and vapor diffusion barriers, then the metal may develop condensation, causing it to rust.
Before installing the metal sheeting onto the house, roofers may coat it with a protective epoxy covering no matter if the metal is installed onto asphalt shingles or not. This material goes on like paint but cures into a solid, impermeable material. The epoxy finish can help to prevent problems such as color-enhanced oxidation. Homeowners can select the color of their choice, although white is the most energy efficient option.