It is not advisable to connect metal to asphalt shingles without first furring out the roof. Install a radiant barrier, 1" X 4" battens, and metal. You can now attach the metal with hot-air welds or mechanical fasteners such as screws.
If you choose to go this route, make sure you allow for at least 2" of clearance between the bottom of the metal panel and the top of the shingle bed. This allows room for any shifting that may occur as the wood expands and contracts with changes in temperature.
The best way to ensure a long life for your metal roof is by installing it properly. If you find any problems during or after installation, contact your contractor immediately so they can correct them before they become larger issues.
Roofing asphalt shingles are the most popular type of material used for home roofs. Asphalt shingles are a composite material consisting of sheets of fiberglass embedded in an asphalt coating. The three main types of asphalt shingles are wood-based, rubber-based and metal-based.
Wood-based shingles are made from the top layer of wood that has been stripped away from the trunk of a tree. The remaining wood is then sanded to produce a flat surface. This layer is then coated with hot asphalt and covered with one or more layers of thin strips of wood called granules. At the end of this process, a wood-based shingle will look like a sheet of flat roofing material with tufts of natural grass attached to some of the holes in the sheet. Wood-based shingles are durable and attractive, but they can be expensive. The cost of wood products affects the overall cost of wood-based shingles. Also, the color choice for wood-based shingles is limited because all wood is white or brown by nature. Finally, wood-based shingles are flammable.
Almost always, the answer is yes. A new metal roof can be installed over an existing shingle roof. One of the many reasons metal roofs are becoming more popular is that their installation does not necessitate entirely taking off the previous roof, which is a time-consuming and costly task. Instead, the new metal roof is added on top of the old one.
The quality of construction of metal roofs varies significantly but most are built to last at least 20 years if not longer. They also require little or no maintenance other than an occasional brush off of dirt or debris. If your roof starts to show signs of wear and tear then it may be time for a new roof anyway. Before you decide what type of roof should cover your home, consider these factors: climate, location, size, and style. For example, if you live in a region that experiences a lot of rain and high winds then a waterproof membrane made of gabion baskets or plastic sheeting would be best for you. If you want something distinctive but not too flashy then metallic paint or sheathing can make any house look good.
Metal roofs are becoming more affordable each year. You may be able to get a great deal on a new roof by shopping around for different types of deals and promotions. Also consider the long term cost of metal versus asphalt or concrete. The initial cost of a metal roof may be higher but you will save money in the future due to less replacement cost and less environmental impact.
To minimize condensation while installing a metal roof over an existing roof, insulate the crevices between the wood strips with rigid insulation before installing the roof. Furring strips are also required. Furring strips for a metal roof are typically spaced at 24 inches apart. The furring strip and roofing membrane together form a water-resistant seal around the perimeter of the roof.
The metal installer should be contacted to determine if any special preparations need to be made to the roof surface before installing the metal. For example, if tar or other chemicals are used to protect the roof's surface, they will have to be reapplied after installing the metal. Also, make sure the site is free of any debris that could be blown into the yard by windy conditions. This would cause damage to the metal itself.
Furring strips are standard roofing materials for flat roofs as well. They provide a durable surface for attaching the roofing material to and create a water-tight seal against the roof. Furring strips can be made of wood, plastic, or metal. Metal furring strips are usually aluminum or steel with an adhesive on one side and screw holes every six inches or so along their length. They can be bent to fit between tiles or other objects on the roof.
Tiles are another common type of flat roof material. They are square or rectangular in shape and are held in place by gravity alone.
Shingles made of asphalt or coal tar that has been refined and heated to make it soft and pliable. The material is applied in sheets over the entire exterior surface of the roof, including the ridge. Shingles are available in a wide variety of colors and styles. They last about 10 years, depending on weather conditions.
The best time to replace your shingles is before significant rain causes them to peel off from the roof. Also check for broken or faded stripes on the bottom of the shingle, which indicate aging or previous repairs. Sunlight can fade paint jobs or gloss finishes on roofs, so consider covering any exposed metal with aluminum foil before painting or staining.
As you can see, replacing shingles is easy to do. Any home improvement store should be able to help you find the right ones for your home. Before you start shopping, take into account the materials used in the manufacture of the shingles, because this will affect their cost. You may also want to look at different styles and colors until you find something you like.