The high cost of timber has pushed roof design into an art that very often employs engineered materials since obtaining lumber is sometimes quite an expensive process, especially if a home is very large or has an impressive roof. There are often some city codes now require the use of fireproof materials for construction so as to avoid the potential for the spread of fire which would likely require significant roof repair around Ashburn VA. Engineered roof materials can also offer a homeowner an especially long lived roof that will require minimal maintenance as long as it is inspected on a regular basis.