The answer to 'which is better roof installation or' is that roof installation is generally better than roof replacement. Roof installation involves putting a new roof on a home, while roof replacement involves removing the old roof and putting on a new one. Roof installation is often the better option because it is less disruptive, faster, and typically more cost-effective than a full roof replacement.
With roof installation, the existing roof structure and materials can often be used, which saves time and money. Roof replacement requires more labor and materials to completely remove the old roof before installing the new one. Roof installation is also a better option if the existing roof is in relatively good condition and just needs some repairs or upgrades. However, if the existing roof is in very poor shape, a full replacement may be necessary.