Right after spring, summer has arrived. And with it came some huge problems such as the strongest rainstorms and even a strange hailstorm. Your asphalt shingle roof is looking troubled and because it’s aged, you think it’s time to replace it. However, you’ve read somewhere that you can save more from partial roof replacement cost than a full-on roof replacement. Is that even possible?

Partial roof replacement is different from a patch-up repair job that many experienced and licensed professional Calgary AB roofing contractors can provide. However, as part of the usual repair service, it is not considerably a partial roof replacement. Roof Your House has a great description of what is partial roof replacement, and an estimation of its costs too.

Partial Roof Replacement Cost Estimation: Partial vs Complete Re-roofing

If the damage is limited to one side of the roof, a partial re-roofing is also an option. Replacing only one side of your roof will certainly be cheaper overall when compared to replacing the entire roof. Replacing an entire section of the roof will make repairs less obvious, as minor color differences between the various faces of your roof won’t be as noticeable.

Partial re-roofing does carry its own set of problems. For example, an asphalt roof more than two layers thick will need to be entirely stripped before the shingles can be replaced. This usually results in a lopsided roof where the older sections are elevated a few inches above the new section.

NOTE: Many Insurance companies will not replace a roof that has been patched.

Another drawback to partial re-roofing is the cost. While partial re-roofing may be cheaper in the short term, you will be paying more per square foot of repair. Regardless of the size of the repair, a contractor will still have to pay for scaffolding, waste disposal, cost estimation, and more. Often the best financial decision is to simply replace the entire roof while the workers are on site, rather than in sections over the course of a few years. (Continued)

In addition, we consider roof overlay installations as partial roof replacement. Most Calgary AB homeowners planning to replace their old roof with a standing seam or corrugated metal roof can build over their old asphalt shingle or tile roof conveniently. It is relatively affordable and can even parallel or offset partial roof replacement cost, but it brings its own set of problems.

Angi has a great discussion of pros and cons about roof overlay partial roof replacement installations. If you think it can work for you, this reference is something we advise you consult firsthand.

Partial Roof Replacement Cost Estimates: Is it Worth Saving Money For?

The best-case scenario for an overlay is sound decking; no previous or existing leaks; and a roof with no sidewalls where flashing is needed to tie in the roofing material to the exterior walls of the home. However, if you overlay, you cannot install an ice and water-leak barrier, as it has to adhere directly to the wood decking. So, if you have an ice dam in the wintertime, it could easily travel under the overlay and leak under the old roof.

The second layer is also more difficult to install properly compared to new shingles. Flashing around roof penetrations and sidewalls can be compromised. Plus, depending upon the size of your roof, you’ve added multiple tons of weight, which could pose a big problem if there is significant snow accumulation.

If there are any pros to overlaying a roof, it’s saving a little bit of money. But because of the amount of prep work involved in overlaying a roof properly, any savings are usually modest — maybe 25 percent — compared to a new roof. The shingles likely won’t last as long, so the job could actually end up costing you more in the long run. The savings simply don’t warrant the compromise of quality and potential risks (Continued)

Lastly, roof design impacts partial roof replacement cost a great deal. A gable or hip-style roof guarantees the lowest material costs. However, as your roof design gets complicated, the partial roof replacement cost increases too.

Will a full-on roof replacement ease the cost regardless of roof design? It is possible. However, it is worth knowing the difficulties your roofing contractors will possibly encounter for both partial or full roof replacement. Roof Cost Estimator has a great list inclusive of pros and cons.

Different Kinds of Roof Designs: Pros and Cons

Gable Roofs

Also known as pitched or peaked roof, gable roofs are some of the most popular roofs in the US. They are easily recognized by their triangular shape.

Pros: Gable roofs will easily shed water and snow, provide more space for the attic or vaulted ceilings and allow more ventilation. Their inherently simple design makes it easy to build them and cheaper than more complex designs.

Cons: Gable roofs can be problematic in high wind and hurricane areas. If the frames are not properly constructed with adequate supports, the roof can collapse.

High winds can also cause materials to peel away from gable roofs. If there is too much of an overhang, winds can create an uplift underneath and cause the roof to detach from the walls.

If a gable roof is used in high wind areas, be sure proper braces are used and have the roof inspected after a large storm to ensure no damage has occurred.

Suggested materials: Gabled roofs can be covered with almost any type of material including asphalt shingles, cedar shakes, metal, and clay or concrete tiles.

However, if the roof also contains hips and valleys, it should either be shingled or roofed with metal shingles or standing seam to help prevent roof leaks.

Note: It is recommended to use at least a 10/12 pitch or 40° angle, for snowy regions.

Types of Gable Roofs (Continued)

At any rate, partial roof replacement cost is still relatively expensive but not as expensive as a full roof replacement. However, in both services, it is vital to use a formidable and experienced roofing contractor to help you. Calgary AB’s go-to roofing company is No Payne Roofing. With decades of experience and knowledge in providing top-quality roofing services, we’re confident we can provide the caliber of service you need. Contact us today!