Building Homes or Extensions/Spots on new concrete

Advertisement

Expert: - 5/19/2011


Question
Dan,

Recently, we got a new concrete in the backyard. I's been a month, we have watered it as required.

In some places on concrete there are dark spots that don't seem to disappear.

What would you recommend to do to remedy that?

Thanks for your time.

BK

Answer
B, the initial set on concrete takes 28 days.  If you were soaking or keeping water on the slab continuously as you should have, it will have moisture throughout.  In a building slab this water will leave the concrete at the rate of 1/2"/month.  I think you just need to givwe it a chance to dry completely.

Building Homes or Extensions

All Answers

Answers by Expert:

Ask Experts

Volunteer

Dan Griffin

Expertise

I can answer almost all questions related to the total construction process. My expertise is in commercial construction, though I can field most any residential question. I have hands on experience in concrete, heavy equipment, masonry, all phases of carpentry, interior finishes, and I am fairly strong in mechanical and electrical.

Experience

I have over 20 years experience as a commercial carpenter and commercial construction superintendent. I have another 20 years experience in facility management for a major school district.

Organizations
My favorite hobby for he past 12 years has been singing bass in a The OkChorale men's barbershop chorus and the Mature Moments quartet.

Education/Credentials
I hold a Bachelor's degree in English and Math. I have completed many continuing education hours in the building trades. I hold a Master Carpenter card from the AGC, Associated General Contractors.

©2012 About.com, a part of The New York Times Company. All rights reserved.