Tuesday, September 12, 2017

Should I Water Proof The Foundation When I Raise The Grade On My House?

A reader of my blog asked me a question the other day and I thought it was worth writing about.

The question was as follows;

"I am raising the grade on one side of my house, do I really need to extend the waterproofing up that side of the building? The grade will have good slope away from the house."

The simple answer is yes you should, you should always waterproof foundation walls below grade even though you don't think that there will be a lot of water in the ground.

Adding a waterproofing to the wall like a blueskin or something else is not that expensive and in small area's can be done by yourself or a contractor that is doing the raising of the grade. All that you have to do is the following;


  • Makes sure you clean the foundation wall of any dirt, rocks or mildue. The adhesive on the back of waterproofing needs clean surfaces to stick too.
  • Make sure the foundation wall is dry, better adhesion for the waterproofing.
  • You can add a dimple board in front to give the waterproofing some protection from rocks and debris.
When your contractor back fills over the waterproofing makes sure there aren't any large stones or stumps that will be pushing on the foundation. This can damage the waterproofing.

The reason that you should waterproof the are isn't just to stop any kind of flooding into your foundation its also to keep all the moisture out of the foundation. When water saturates either block or concrete overtime it will start to break down the foundation, especially with freezing and thawing. This will crack and shift the foundation until it starts to crumple and then you are into a big repair bill.

A little bit of waterproofing goes a long way.

Rob Abbott
Village Builders Inc.