About CG-SI


At C.G.S.I. we strive to provide superb products at competitive pricing, along with high quality installations. Our customers are our greatest asset and we take pride in the opportunity provided to work with them. We have over 20 years experience in all facets of the services we offer. We value the relationships with our customers and treat their projects as they were our own. We do our best to maintain a clean, safe work area while performing the work at our customers home or business. Thank you for taking the time to view our site and we look forward to being able to offer our services to you. 


Our customers are our highest priority. We stand by our work with a one year warranty on Labor. We are always willing to do our best to walk you through the process and answer any questions you may have. 


Why is custom work important? Custom work means we fit your needs and wants. Whether it's showers, or shelving, or even glass table tops we customize the glass/shelves to tailor to your specifications. 

Additional Information


We offer a wide range of services and products for your residence as well as commercial business property. We also work with property managers for condominiums, townhouses, apartments and commercial properties. 


- Shower doors 

- Tub sliders 

- Mirrors 

- Tabletop and desktop glass 

- Window repair and replacement 

- Screen repair 

- Skylight glass repair 

- We sell and install entrance doors, patio doors, french doors and interior doors. 

Closet organizing systems:

- We offer free design consultation 

- Walk In closets

- Pantries 

- Laundry rooms 

- Reach in closets 

- Storage closets 

- Garage systems 

All available in a wide variety of color choices. 

Commercial services:

- Storefronts 

- Commercial entrances 

- Glass partitions 

- Window repair and replacement 

- Emergency service available 

We are also certified in :

- EPA lead renovation certified 

- Massachusetts HCIC 

- Dreamline shower door certified installers 

- Basco shower door certified installers 

- Century shower door certified installers