Oswaldo and his team did a fantastic job on the roof and replacing the skylights on my property. Not only was the job professionally done but the project management part was superb too. Job was done on time and I was kept well informed at all steps of the way. I did not have to vivit the site once - being in the middle of a pandemic with a two ear old i was very appreciative of this. They proved beyond reliable. I am so happy with the work. I waited to give the review but we are a year in and there is every sign that this work was done to last. Oswaldo and his team take a lot of pride in their work, and that is the sign of a contractor a world apart. SO happy I chose them for the job!

Thank you Oswaldo for the great service and communication. I highly recommend GDO for shingle repair and replacement in Maple, Vaughan. Very happy with the results and my roof is protected!

Oswaldo and his team were quick and efficient in their assessment of the problem and delivery of the work. The price was very reasonable too. Most importantly, GDO went above and beyond by identifying where on the rest of our roof small but effective repairs could be made to further extend the life of our roof (we purchased a flipped house so short-cuts were apparent). Oswaldo helped complete the small repairs and did a thorough final clean-up. Great service, great price and I could especially see that GDO took pride in a job well done.

Thanks Oswaldo and team!
Best regards,
Leonard & Barbara

The work was excellent; after diagnostics, and found the problem and suggestion for the repair well planned and very nicely executed.
Mr. OSWALDO is a knowledgeable, hands-on project manager.
I am pleased with is work
and highly recommend him
Shasha From Shasha Bread Co. 2021

The roofing Oswaldo did on my property with his key helper was astounding.
Reliable and Honest. Price and Workmanship was above expectation.
No Need to go out and have quotes from a hand fill of roofers.
The job was done quickly and the clean up afterwards was remarkable
I highly recommend Oswaldo & his team to do your roof.
You will not be disappointed….a real professional
Oswaldo manner was unbelievable……

Oswaldo and his team are honest, timely, reliable and a pleasure to deal with. If you have roofing issues, I cannot recommend anyone more highly than GDO Construction. Our house stands 4 stories high and this was not an issue for them. They are well equipped, punctual, professional and very friendly.

Oswald always gives you quotes and is very reliable, clean and very detailed with pictures and video to show what problem was and the end result . Work is done same day and no issues to date. Would recommend him and crew to anyone.

Repairs around the chimney and replaced broken titles. I was satisfied the way the job was completed.

came when they said and did a great job
Very reliable
Fully recommended for any roofing needs
AAA

Oswaldo and crew did a great job , within budget and in time. He is a straight shooter and good at what he does.
Work was done as duscusse. Post work clean up included .