Supplying quality windows and doors to Simcoe County, Muskoka, and beyond since 1993.

We could not be happier! The products, expert installation and finishing are beyond our expectations.

Hi Michael and Adam, Our Frank windows and ThermaTru doors are now installed in our home by Troy, Dan and his crew (Blair, Christine, & RJ). We could not be happier! The products, expert installation and finishing are beyond our expectations. Troy and his crew are exceptional. Having installers in your home for four long days can be stressful but they brought positive energy and made it such an easy process. Troy and the team took their time and solved all challenging issues that our home presented to them. The team is respectful, neat, hardworking and are all perfectionists (which I appreciate). It was a real pleasure to have them here. You’ve got reliable, professional contractors there! Thank you again for a terrific experience. We’ll be passing out your contact information whenever our neighbours ask - as they will. Wishing the best to you all, Jennifer & Jamie

Hi Adam, I just wanted to say, I love, love, love my door! Chris & his partner did a great job. I couldn't be happier! I will definitely recommend you. Regards, Joan M.

One of the main reasons our process for replacing our front door included DeCola Windows & Doors was because of their involvement in the local community over the last 25+ years, specifically donating windows to the Hospice Huronia. When we went to the showroom, we were pleased with Adam’s advice and the direction he persuaded us in with style, especially with the privacy glass. He was upfront with the manufacturers and how their quality, credibility and service is a main reason they carry such brands. The pricing was very competitive to other quotes we received too. The recommended installers did an excellent job installing the door too. They were quick, courteous, on time, clean, and even offered to come back for adjustments if they were needed. We are very pleased with our new front door and receive compliments from all our friends and neighbours. We would 10/10 recommend DeCola to anyone looking for new windows or doors.

I recommend DeCola Windows and Doors to anyone looking for excellent quality windows and service!

The owner, Angelo DeCola, showed up on schedule, and was very professional and efficient with the window screen repair today. These high quality windows were purchased 10 years ago from this wonderful company. I recommend DeCola Windows and Doors to anyone looking for excellent quality windows and service!

It’s nice to have an honest company to deal with and not have to worry about shopping around.

We have been using DeCola for all of our windows and doors for over 15 years and have been extremely pleased with them each and every time. Their products are excellent quality, very reasonably priced and they only use the best installers in the business, which in our opinion, makes all the difference. Paul and his team are very helpful at finding the right products for a quality job and the final outcome always exceeds our expectations. It’s nice to have an honest company to deal with and not have to worry about shopping around. We very highly recommend DeCola!

With help from Jerome, we’re sitting in our new room watching the birds. We wanted to thank you for all your help in making it happen. Kathy and I are enjoying it very much, the finished product exceeded both our expectations. Thanks again!

We had to replace all of our windows – and working with Paul was so easy! He made it effortless on our part, advised us on what would look good and even showed us the energy savings we would see! He was absolutely right!!! Thank you Paul and all the staff at DeCola Windows & Doors! Our house looks beautiful!

An absolute pleasure to deal with, on time delivery, and install without a hitch.

Not very many people want to get new windows for their whole house. When you do, please go to Ange at DeCola Windows and Doors. An absolute pleasure to deal with, on time delivery, and install without a hitch. Thanks again Ange.

Paul, Angelo and their team listened to our needs and were consummate professionals that I recommend without hesitation.

When we decided to take on the task of gutting an old building and rebuilding it to become our custom jewellery store, we looked to DeCola Windows & Doors to provide us with the quality product that would help us to stand apart from the competition. Our building has been modernized with sleek new windows and doors that add to the first impression of passers by. Paul, Angelo and their team listened to our needs and were consummate professionals that I recommend without hesitation.

I have been purchasing windows and doors from DeCola for over 10 years. Paul and Angelo have great knowledge of their products and industry. Their showroom location is convenient and displays a wide range of available products so your client can really understand what they are purchasing … should you require after sales service, Paul and Angelo will ensure that you are looked after in a timely and professional manner.

Prycon Custom Building and Renovations have been purchasing their windows and doors from the DeCola brothers for over 11 years. We find them very knowledgeable about their products and consistently deliver high quality product at a very competitive price. I would strongly recommend DeCola Windows & Doors to anyone looking for windows and doors for their home.

I needed to replace all my windows and hardware throughout my 25 year old house. The staff at DeCola Windows and Doors came in gave me a competitive quote. Not only was it the lowest price but also the best quality. Seven years later still no problems or issues and I continue to be completely satisfied with the product. Thanks Paul & Ange!

A perfect job and a quality product!

We are delighted with the products and installer recommended by DeCola, for adding new windows and doors to our lakefront home. Installer matched the smallest architectural details so that windows and doors look like the original installation. A perfect job and a quality product!

We purchased an Ostaco Patio Door from DeCola Windows & Doors and couldn't be happier. Delivery and service were exceptional. Since then I had the opportunity to photograph many homes that DeCola has provided windows and doors to and I must say that the workmanship of the installations were outstanding. Beautiful products!

These guys know their stuff and have made me look good on many occasions.

I have been using DeCola to supply product for projects in the Georgian Bay area since 1993. Their team have always been willing to spend the time to listen, ask the right questions, and give insightful advice and suggestions in order to be sure their customers feel comfortable with the process and the product they will be receiving. These guys know their stuff and have made me look good on many occasions … Thanks guys.

What a great company to deal with! Professional throughout the whole process – we replaced 27 year old windows throughout our home. Replaced front entranceway and replaced our sliding back door with double the size. The recommended installers did an amazing job with the replacements which required renovations both up and downstairs. Amazing transformation inside and out to our 27 year old custom home. Thank-you to Ange and Andrew!

Thanks to Jerome at DeCola Windows for providing us with the help and direction needed in making our window purchase. We had purchased 10 windows in total with 2 of them being large picture windows and a new front entry door. All of the windows had specific measurements for the most part and all of them including the front door were fitted with ease, all of the details we requested also arrived as promised. Thanks again to Jerome and the recommended installers for making a large job seamlessly simple.

We are extremely satisfied with the results and would highly recommend DeCola to other home owners.

From start to finish we were delighted with the products and service we received from DeCola. … Paul DeCola was most understanding, reassuring, and helpful as we made (then re-made!) decisions - we greatly appreciated his product knowledge, patience, and professionalism! … We are extremely satisfied with the results and would highly recommend DeCola to other home owners.

It was one of the easiest parts of our huge renovation project.

DeCola Windows & Doors replaced all the windows and doors in an 80 plus year old home we purchased in Barrie last year. Paul advised us on style, function, colour … everything. We required specialty door hardware and DeCola was able to source the necessary door product for our retail location. It was one of the easiest parts of our huge renovation project.