The choice of underlayment is something a roof-repairs-contractor will discuss during a repair. If large sections of shingles are being replaced, they may recommend a synthetic underlayment rather than traditional felt paper. Synthetics are much tougher, don't absorb water, and provide a superior secondary barrier against leaks. A contractor who refuses to cut corners on these hidden ... https://kkroofspecialist.com.sg/roof-repairs-contractor/