San Francisco Bay Area General Contractor

San Francisco Bay Area General Contractor

G.T.I, Inc has been offering general contracting services to the San Francisco Bay Area and all surrounding counties since 1989. We are specialize in all kinds of Commercial and Residential Construction Work. You can view our full list of services under the Services Menu. With over 20 years experience, you are guaranteed to have peace of mind knowing Greentech Industry, Inc is handling your general contracting needs.

Siding is like the skin of you home and has two main functions, aesthetic and protective. A home with properly installed siding and insulation can save you hundreds of dollars a year on heating and cooling costs.

Siding is the first thing people see when looking at your house and curb appeal is very important when showing your home to prospective buyers. New siding may also help you increase the value of your home and even sell it quicker. Siding can be a worthwhile investment that can pay off with the right siding contractor. 


Rain, hail, frost, heat and humidity - San Francisco and the surrounding area can be an extreme environment for your house.

Your siding has to be versatile enough to perform in all types of weather. 

The elements can take a beating on your home's exterior and siding is critical in ensuring your investment and the safety and health of your family.

As your San Francisco bay area contractor  we understand this. 

It will protect what's inside and give your home a beautiful exterior finish. It will be like having a new home. 

Who you choose to install your siding is crucial. You need a contractor who understands the importance of the exterior of your home on several levels. That is why we are your San Francisco bay area Contractor.


With years of experience and many satisfied customers, we know what matters to you most when it comes to siding.

From helping you choose the type of siding to matching the color of your house, we will ensure your home's siding installation is a smooth process. 

We use quality and durable materials to ensure your investment will be protected for years to come. Give us a call today and find out for yourself.