What goes under metal roofing is an important consideration when selecting the best roofing material for the job. Metal roofs are popular because they are cheap, easy to install, and resistant to extreme weather conditions. The main problem with metal roofs is that they tend to rust and deteriorate over time if not installed properly. As a first line of protection against natural water damage it’s important that the proper metal roof overlapping be applied correctly. This article will examine both alternatives to standard metal roofing.
A lot of companies choose to use a metal underlayment instead of the main feature material. Metal underlayment acts as a layer between the main roof material used, the shingles, and the sub-phalt. It is usually made from recycled materials and is easy to install due to the low cost of tools. The main features of this type of roofing are the quality of the flashing and the amount of overlapping needed to ensure that water flow does not damage the roof.
Other roofing companies prefer to use asphalt shingles as their main material under metal roofs. They like asphalt shingles because they are durable and have an added fire retardant feature. As you might expect, asphalt shingles are very expensive and are usually required in only those buildings with particularly heavy snow loads. The cost of the asphalt shingles can also be a problem, because they are not very flexible and require the use of sharp nails or screws to keep them together.
Before choosing asphalt shingles as your main choice for your metal roofing application, it is wise to understand the differences between them. Among these differences are their specific features. Asphalt roofs offer a lot of flexibility, but these flexible roofs are more easily damaged by wind and rain, which make them poor choices for cold or stormy weather conditions.
Another downside to asphalt shingles is their propensity to leak. Asphalt shingles do not fare well in extreme weather conditions. Roof leaks are the number one problem associated with asphalt shingles, especially on snow covered roofs. In addition, the leaking can cause the roof to become unsightly, which cannot be a desired feature for many home owners.
One final option when considering what goes under metal roofing is the installation of a polystyrene underlayment. This type of underlayment is specially designed to provide the much needed protection and stability for your roof. While it can also help to protect the structural integrity of the roof, the polystyrene is a superior product for this purpose. The polystyrene is an excellent sealant that works to reduce the growth of mold, moss, mildew, and algae.