1.     Age of the roof: If your roof is more than 20 years old, it may be nearing the end of its lifespan and may need to be replaced.

2.     Sagging or uneven rooflines: This can be a sign of structural damage or water damage and could indicate that the roof is in need of repair or replacement.

3.     Missing or damaged shingles: If you notice that shingles on your roof are missing, cracked, or otherwise damaged, it's likely that they will need to be replaced.

4.     Leaks or water damage: If you have noticed leaks or water damage inside your home, it could be a sign that your roof needs to be replaced.

5.     moss or algae growth: These can indicate that your roof surface is not shedding water properly, and algae or moss will have a tendency to weaken the surface and make it less effective.

6.     Curled or cracked shingles: As shingles age they tend to lose some of their granules and may also warp or crack. this could also be sign of needing a new roof

It's always best to consult with a professional roofing contractor to determine whether or not your roof needs to be replaced. They will be able to perform an inspection and give you a detailed assessment of the condition of your roof and recommend the best course of action.

The cost of a new roof in Colorado can vary depending on a number of factors, including the size and pitch of the roof, the type of materials used, and the experience and reputation of the contractor. In general, the cost of a new roof can range anywhere from $8,000 to $25,000 or more.

The average cost of a new roof in Colorado, using asphalt shingles, could be around $9,000 to $15,000 for a standard-sized single-story home, and around $15,000 to $25,000 for a two-story home.

Other type of roofing materials such as metal, clay tile or slate will have different costs. Also, the labor rates in Colorado can vary depending on the location. For example in the mountain communities labor is much higher than in the urban city locations. It's always best to get multiple quotes from different contractors to compare prices and ensure you're getting a fair and competitive price for the work.

Keep in mind that, the cost of the roofing project may also include the removal of old materials, proper ventilation and any necessary permits, which will add to the overall cost. It is best to check with a local contractor who can give you an accurate estimate considering all these factors and also the local building codes and regulation.

Yes, most roofing contractors will offer some form of warranty or guarantee on a new roof. The length and coverage of these warranties can vary depending on the contractor and the type of materials used.

Manufacturer's warranty: the material supplier company for shingles or other roofing materials typically provides a warranty of the material and its performance. The warranty terms and duration can vary depending on the manufacturer, the type of shingles and the climate of the location.

Workmanship warranty: this warranty is typically provided by the contractor, covering the labor and installation of the roof. This warranty covers any defects or issues that arise from poor workmanship, and will generally last anywhere from 1 year to 5 years.

It's important to carefully read and understand the terms of any warranty or guarantee offered by a contractor before hiring them for a roofing project. Be sure to ask the contractor about the warranty terms, the materials and service covered, and what the process is for making a claim if something goes wrong.

It's always important to keep the receipts and invoices related to your roofing project and have a clear documentation of the work done, just in case any issue arise, so you can easily make a claim under warranty.The average cost of a new roof in Colorado, using asphalt shingles, could be around $9,000 to $15,000 for a standard-sized single-story home, and around $15,000 to $25,000 for a two-story home.

Other type of roofing materials such as metal, clay tile or slate will have different costs. Also, the labor rates in Colorado can vary depending on the location. For example in the mountain communities labor is much higher than in the urban city locations. It's always best to get multiple quotes from different contractors to compare prices and ensure you're getting a fair and competitive price for the work.

Keep in mind that, the cost of the roofing project may also include the removal of old materials, proper ventilation and any necessary permits, which will add to the overall cost. It is best to check with a local contractor who can give you an accurate estimate considering all these factors and also the local building codes and regulation.