Get matched with top excavation pros in Saint Helena, CA

"Humberto is a very creative problem solver! Personable and definitely interested in customer satisfaction, so spends time understanding the full scope of the problem. The problem was the subterranean north wall of the sanctuary of First Presbyterian Church in Vallejo that was far from being waterproof, especially with the rains last winter. Castaneda dug out the soil next to the wall, pressure washed it and applied two coats of DryLok and then a layer of Henryâ s waterproofing. Then Humberto installed a French drain and then a big pipe to route the water off of five downspouts. To get the correct drainage slope, more excavating needed to be done than anticipated. Removed five landscaped trees and lots of concrete that was in the way of the drains which were to be routed under city sidewalks."

"I have hired this company on several occasions and they have never disappointed. The owner Adam and his employees have always done an excellent job. I?m very satisfied with their work product. I would recommend this company without a doubt. Whether you need demolition work, excavation and the like they will show up when promised which is rare these days. I have also rented dumpsters before. They offer a range of services."

"Jose installed a French drain and piping for the downspouts to drain into. Jose was very prompt and courteous. He kept me updated throughout the course of the project."

"I cannot say enough about how good this experience with John Mountain/Mountain Engineering has been. They said it would be 3 weeks; anti was. The work was painstakingly done, including a French drain behind the wall. And they replaced the plants that were destroyed during the process, which was an unexpected bonus."

"They did an amazing job, and I would hire them again for sure."

"They did great work. He was very easy to work with and kept a very clean site. I recomended him to 2 other friends."

"Edgar and his employees were amazing. Their bid was the best. Other guys said they would have to rip up pavement that this crew could do no problem minimally. The guys were so well groomed and polite. Not that that matters but it was an extra bonus. Lovely crew and incredible job in a few days. I will for sure use them again."

"Scott is well experienced.Gets the job done Fast"

We are a general engineering contractor that offers high-quality craftsmanship in all site, work underground, utilities, paving, and concrete work.

Demar Inc. proudly serves its customers with pride, integrity, and attention to the details that matter most to you. This is one of the many things, that set us apart from the rest. We are locally owned and operated. Give us a call today!