time it takes to replace a roof

How Long Does It Take to Replace a Roof?

Replacing your roof is costly. It disrupts your home or business for as long as two weeks. However, water leaks can affect the structure of your home. Leaking roofs give rise to the growth of molds and mildew. Breathing these dangerous spores can lead to headaches and breathing problems. If you repair your roof, it will save you money on heating and cooling costs. How long does it take to replace a roof? There is no one correct answer to this question.

how long does it take to replace a roof

How Long Does it Take to Replace a Roof?

The easy answer is that it can take anywhere from a day to over two weeks to replace a roof.

It depends on these factors:

Roof Size

When calculating how long it takes to replace a roof, calculate the area of the roof.

It’s simple mathematics. The larger the house or business, the longer it takes to replace the roof.

Roof Complexity

How long it takes to replace a roof also depends on the roof’s complexity.

First, the pitch or steepness of the roof is a factor. A roof with a shallow pitch often requires special underlay so water won’t collect on it. Replacing the underlay requires more time and materials. While shallow roofs may need extra underlay, the low pitch makes it easier for the roofing crew to move materials to the roof and to replace it.

Roofs come in many shapes and designs. This can increase the time it takes to replace the roof. Roofs with a steep pitch make it precarious for roofing crews to do their job and slows down their progress.

Some roof designs are simple. Thus, the installation is faster. Complex roofs with valleys, dormers, and direction changes increase how long it takes for installation.

Roofing Material

How long does it take to replace a roof? Roofing material is a factor. Roofing specialists offer this guideline for the replacement of an average roof. Asphalt shingles are the quickest to replace. These take a day or two. Steel roofing sheets or wooden shingles take between three and four days. Slate roofs require up to a week to replace. If you are contemplating using concrete tiles, expect the replacement to take eight or nine days.

Preparation for Installation

When considering how long it takes to replace a roof, you need to consider the condition of the roof. If there is structural damage under the shingles, the roofing project may take significantly longer.

Then, decide whether the existing roofing material needs to be torn off first. Sometimes, you can save money by replacing the roof over the existing roofing material. If there are already two layers on your roof, a roof-over or roof overlay, is out of the question. If shingles are curling or in bad repair, a tear-off is the better route. However, if the old roofing materials are lying flat, you can lay a new one on top of the existing one.

In making this decision, trust the experience and expertise of your roofing contractor. Not taking off the old roofing material can save installation and cleanup time, but you want a finished product that is both aesthetically pleasing and efficient.

Usually, roofing contractors don’t recommend replacing a roof on top of the existing one. Simply adding on instead of tearing off adds extra weight. It may void the warranty on the roof replacement.

While the tear-off time is not usually a major factor in how long it takes to replace a roof, the time required to clean up discarded materials is a consideration.

how long it takes to replace a roof

Roofing Expertise

How long does it take to replace a roof? Well, how experienced is the roofing crew? The competence of the roofing crew is one factor. The size of the crew is another. The bigger the crew and the more experienced they are, the faster the job will be completed.

When estimating a job, a typical roofing contractor uses a calculation of between $1.20 and $4.00 per square foot to tear off and replace an asphalt shingle roof. Costs increase with other roofing materials. These are more costly and take more time to replace.


Roofing estimates must also consider Colorado’s climate complications. It takes longer to replace a roof in cold weather. Additional steps are required. Replacing a roof when it is raining or snowing is unsafe. Inclement weather conditions will likely prolong how long it takes to replace a roof.

In temperate climates, roofing usually stops in the winter months. Hot summer months are also a factor in roof replacement time. When temperatures climb, roofing crews must take frequent breaks for health and safety.


Why is ventilation a factor in roof replacement time? Qualified roofing contractors will ensure that the ventilation in your home or business is adequate. This may take extra time. However, with effective ventilation, you can avoid issues like mold, water, and structural damage. Good ventilation will extend the life of your roof replacement.

Building Accessibility

What does accessibility have to do with how long it takes to replace a roof? Roofing crews need to be able to get at your roof from all sides. If you take the time to remove patio furniture, children’s toys, and other obstructions, it will make things easier and faster for roof replacement.

Preparation is key. The more prep work that is done, the faster the work will go. Trim bushes. Park cars and bikes in the garage or away from the roof replacement site. Plan for kids and pets to be inside or away from your home during roof replacement.

Typical Roof Replacement Cases

Prices for an average roof replacement can vary with time and materials. A good guideline is to expect that a 1,500 square-foot ranch style home will average between $5, 500 and $10,500.

Roof Replacement Extreme Scenarios

Many factors can drive up the cost of and time required for roof replacement. Large homes and/or ones with complex architecture can take more time. If there are issues of structural damage, water damage, or ventilation problems, roof replacement may take longer. Weather can also be a factor in prolonging roof replacement time.

replace a roof duration

How to Choose a Reliable Roofing Company

If you’ve never replaced the roof on your home or business, you may know little about roofing companies in your area. Here are things to consider:

This is a major expenditure so you want a roofing company with a good reputation. You want guarantees of both materials and labor. The company you hire should be licensed and insured. You want professionals who are experts in both roofing material and replacement.

Check out the online reviews for companies you are considering. Ask people whose opinions you trust. Check out the roofing experiences of friends and neighbors who have recently had roofs replaced.

Why Choose B&M Roofing?

How long does it take to replace a roof? If you are trying to replace your roof in the shortest time possible, you need a company that specializes in roof replacement.

B&M Roofing is a Colorado-owned company boasting seventy years of dedicated service and commitment to excellence. They are licensed and insured.

Each roof replacement receives the experience and expertise of seasoned professionals. Started in Fort Collins in 1947, B&M Roofing provides meticulous service to thousands of homes and businesses annually.

For more information about how long it takes to replace a roof or to inquire about a free roof replacement estimate, contact B&M Roofing today.