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*The Angi rating for Window And Door Contracting companies in Harlowton, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.

*The HomeAdvisor rating for Window And Door Contracting companies in Harlowton, MT is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Window And Door Contracting needs.

Last update on November 24, 2025

Window Door Contractors questions, answered by experts

A hollow core door has an average life expectancy of about 20 to 40 years, with most lasting 30 years before they need to be replaced. Doors that are well cared for can last on the longer end, as long as no severe damage occurs.

A front door lasts between 20 and 100 years, or an average of 30 years. How long it lasts depends on the type of material, the environment, and how well you maintain it. A door with coverage over it will last longer than one exposed to the elements. Using high-quality paint or sealants can also help extend the life of your front door. Wood front doors tend to have shorter lifespans than other materials.

It’s possible to install a door yourself if the wall opening already exists, but the work is rather complicated, and a professional installation is usually well worth the investment. For your door to work and close properly, you’ll need to shim and level the door frame in your wall perfectly, which can be difficult. Additionally, we recommend you always hire a professional door installer to place an exterior door, as mistakes during the installation process can lead to poor security for your home.

There are certainly perks to hiring a general contractor, but we recommend a closet professional. The reason is that their pricing may make more sense for your project. General contractors tend to search out bigger projects, and because of this, will attach a premium to smaller amounts of work. A closet pro may also have access to a wider range of materials than general contractors (and may be able to negotiate better discounts). 

Yes, you need to install a sill for an exterior door. A sill offers structural support for the doorframe and creates a place to install the threshold, which is essential for keeping water from seeping underneath the door and into the home. Door sills are not necessary for interior doors.

The Harlowton, MT homeowners’ guide to window and door contracting services

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