John and his team installed a new sliding patio door within the last couple of months. There were a…read morecouple of visits to our place to make sure everything would fit and the colours would match existing windows and the interior. They made good practical suggestions regarding the model of door and handle styles and colours. We couldn't be happier with the job they did. Everything was removed and the new door installed with everything as neat as a pin when they left. The new door has much more glass area than the old door and provides a great view of the trees in the back yard. Pricing was very competitive.

Dave came to the house and looked at the project we had and gave suggestions and tips as to guide…read moreour process.

Scott fixed a quirky screen door problem. He found an effective solution with expertise and…read moreefficiency. Very professional and committed to doing the best job possible! Very fair pricing.

From the owner: Niagara's Premier WIndow and Door Company Quality Products,…read moreExceptional Installations, Friendly Service

I needed work done so waited until 7am when there said they were open and just got an answering…read moremachine well into the 7 o'clock hour. Then finally contacted at 9am. Given an appointment time that was changed 3 times during the day. Work was finally done changed to my credit card and now 3 business days later still no receipt. Even after calling once.

From the owner: Canadoor Garage Doors, based in Barrie, Ontario, has built its reputation on its superior quality…read moregarage door systems and openers. We professionally install for residential, commercial, agricultural, or industrial uses. We have proven experience in every phase of garage door selection, installation, maintenance, service, and garage door repair. Canadoor Door Systems Inc. offers a comprehensive range of new and automatic products for all openings in any building in Ontario, Canada. We are providing reliability as the one contractor for all door requirements. The Canadoor Service & Repair Department is one of the largest and most diversified in the industry. From residential garage door service & electric opener service.

Wonderful service! The guys were so friendly and professional. Fast efficient and the windows look…read moreamazing!! Thank u!

Save your money and go elsewhere . I've owned plenty of doors in my life but never had problems…read morelike the ones from Dans discount windows and doors. Within less than one year from having a new front door installed by Dans, it's been nothing but problems . The wood around the striker broke shortly after install, I called them and they talk to you like you've never used a door before , they put all the blame on us for being too aggressive opening and closing the door and the project manager constantly had to leave multiple times for personal problems (which has nothing to do with the customer- we all have problems in life) ) - all this with a lifetime warranty on the door, which they point out when purchasing but they don't honour it. The hardware on the door never stays tight so every month I've have to re tighten all the hardware (which is absurd ) and they said they would try to fix the broken wood by the striker but they never return your call or show up - I'll be replacing this door before it's even 3 years old because I'm sick of the maintenance required to just keep it operational . Worst customer service I've ever had . Save your money and buy elsewhere. Buyer beware I only gave one star because I couldn't give zero stars

We recently had them replace our storm door and entry door. Our threshold was a very old and in…read moredesperate need of replacement. Dan was very knowledgeable and explained everything well. He also took the time to help me find the entry door that would work perfectly for our house. Dan is very conscientious, fair priced and did a beautiful job. If you need door or windows replacements, I would highly recommend Dan at Alt Builders.

I'm writing this review on behalf of my friend Jeff who recently had a patio door replaced in his…read morecondo. Based on the reviews he read here on Yelp he decided to go with Alt Builders and their owner Dan. He contacted Dan and was who responded very promptly on a Sunday afternoon. Dan came out the next day to size up the job. He was prompt and very knowledgeable about what Jeff was looking to have done. The patio door was ordered and came in approximately 3 weeks later. Dan and his crew were able to come out to do the job within a couple of days and completed the job in a day and a half just like he promised. They cleaned up and the installation went smoothly. The price was very reasonable and Jeff is definitely going to hire Alt Builders in the future to get some doors installed. He highly recommends Dan for any work or repairs you might need.