Read each of these important considerations carefully and learn what you can expect from National Window:

Experience is essential to a quality installation. National Lumber has been serving builders and homeowners throughout New England since 1934. With a proud legacy of exceptional customer service, they carefully chose National Window as an installed services affiliate with experienced staff.

Warranty is essential to your peace of mind that your investment in your home is protected. How long can you expect the product to last? What happens if there is a problem with the installation? See our Warranties page for our answers. You will receive written warranties from National Window and from the manufacturer of the product you purchase.

Licensing is essential to confirming the installation is performed by qualified workers. In Massachusetts, the Office of Consumer Affairs runs an arbitration program to resolve disputes between registered contractors and homeowners, and administers a Guaranty Fund for homeowners with unpaid judgments against registered contractors.

In Massachusetts, all individuals who perform roof replacement, siding, and window replacement are required to hold both a Home Improvement Registration and a Construction Supervisor's License. The Home Improvement Contractor Law, chapter 142A of the Massachusetts General Laws, requires any contractor performing work on an owner-occupied, single-family or owner-occupied, multi-family home (with a maximum of four units) to be registered with the Department. Check the website as some specific types of work are exempt. See our Licensing page for more information.

As you compare us to other companies, ensure that the contractor is appropriately licensed and is a Licensed Construction Supervisor and a Registered Home Improvement Contractor with the Massachusetts Dept. of Public Safety's Board of Building Regulations and Standards (“BBRS”). Click here to look up a license number with the Office of Consumer Affairs in Massachusetts.

Better Business Bureau is a well-known source of information on businesses across the country.

National Window is a BBB Accredited Business. This means we support BBB's services to the public and meet the BBB accreditation standards. National Window, a DBA of National Replacement Windows Company, LLC, has an A+ rating with BBB.

Click here to read our BBB review.

This means BBB has determined that the business meets BBB accreditation standards, which include a commitment to make a good faith effort to resolve any consumer complaints. BBB Accredited Businesses pay a fee for accreditation review/monitoring and for support of BBB services to the public. BBB accreditation does not mean that the business' products or services have been evaluated or endorsed by BBB, or that BBB has made a determination as to the business' product quality or competency in performing services. Businesses are under no obligation to seek BBB accreditation, and some businesses are not accredited because they have not sought BBB accreditation.

As you compare us to other companies, be certain that they are in good standing with no complaints on file, or with good resolutions confirmed.

Insurance is essential to protect you and your property from unforeseen accidents that may happen when work is done on your home. Be aware that if the Contractor does not have workman's compensation insurance and a worker gets hurt on your job, you could be held responsible. Liability applies to you if the contractor damages your neighbor's property and doesn't have liability insurance.

Our representative will show you proof of insurance. See our Insurance page for more information.

Reputable companies carry workers' compensation insurance to cover their workers. In fact, with limited exceptions, every employer in the Commonwealth of Massachusetts with one or more employee(s) is required by law to have a valid workers' compensation insurance policy at all times.

Reputable companies also carry adequate liability insurance. For extra peace of mind, ask the contractor the name of his insurance company and call that insurance company to verify that he does have liability and workman's compensation coverage currently in force. The MA registration or license process does not require proof of insurance.

Select a contractor vs. choosing from multiple bids. If you've done your research and are comfortable that a contractor is right for your job and will be respectful of your budget, it is fine to select a contractor without taking bids. You may also request bids but note that the best bid is not always the lowest. The quality of materials, experience, quality and capability of the companies may differ. Ask specifically about project management — will a Licensed Construction Supervisor be on-site to supervise the installation? Examine the scope of the proposals carefully, checking for similar inclusions such as waste removal and guarantees.