A new roof is an important investment. You wouldn’t want your roofing contractor taking shortcuts because there will be long-term consequences if the roof isn’t done right.
1. Mixing in low-quality materials – It’s pretty obvious when major components like shingles are replaced with low-quality materials, which unscrupulous contractors would often do to cut costs and pocket the difference. Instead, they’d mix less-noticeable components like off-brand underlayment or use fewer fasteners than what was prescribed by the manufacturer. You won’t notice the difference until after a few years down the line when the roof begins to need repairs more often than it should. A trustworthy contractor should have no problems with you inspecting the materials as they arrive and comparing them with the list of materials on your contract.
2. Installing the new roof right over the old one – This is also known as “reroofing”. Some contractors offer it as a way to cut installation costs by skipping the tear-off and disposal of the old roof. While this can shorten installation time and lower the contract cost, it also skips critical steps, such as performing structural repairs. Most roofing manufacturers require a proper roof replacement process – that is, the old roof will have to be stripped down to the decking – to ensure reliable long-term performance.
3. Using staples for installation – Every roofing system has its own type of fastener; staples are not among them. While staples do cost less, they are not designed for use on roof installation and can result in a roof that can be easily damaged by wind.
4. Ignoring the underlayment – Underlayment or “felts” is the moisture barrier installed between the roof deck and the outer roofing material. It serves as a second line of defense against moisture infiltration in case of damage to the outer roof. A trustworthy contractor will always use the type of underlayment prescribed by the manufacturer, never using substitutes or ignoring it altogether.