07:20AM | 02/20/06
Member Since: 02/19/06
1 lifetime posts
I had a house framed up this past fall it is backfilled. It is a walkout with only 1 4 foot block foundation around the rest. I just noticed the back wall opposite the walkout has cracked all the way through from top to bottom. Some of the crack follows the mortar and some go through the blocks. The builder installed a drain system and says it isn't a problem. Is it?


10:56PM | 02/20/06
Member Since: 03/05/04
301 lifetime posts


a drain system is fine but, it NO way will keep all water/moisture away from...out of...a crack.

and, many cracks will widen, get bigger and then allow MORE water/moisture into a hollow-block wall. this is Often why mold/mildew/efflorescence/discolorment will be seen on the inside.....`cos water is allowed to enter.

so, a builder/whoever that isn`t concerned about a crack either doesn`t fully understand 'how `n why water enters' and/or doesn`t care.

I`ll say it again, raising-sloping the grade or longer downspout extensions or french drains etc etc does NOT seal/waterproof any crack, these techniques will divert 'some surface' water away which is fine, but cannot keep all water/moisture away from the entire DEPTH of a foundation wall, and where any cracks are.

And some cracks will appear hairline in size on the inside but, can be wider on the outside...this is just how block walls crack.

Often with block walls, there will be NO 'visible' crack when looking/inspecting the walls on Inside of basement but on the Outside there are hairline to 1,2++ inch wide cracks. And again, THIS is where water/moisture enters INTO a hollow-block wall and will often show up inside at/near where the floor and wall meet...cold joint.

Did the builder damproof the outside of the walls or Waterproof them?

Did they 'Backfill' against the Outside walls with at least 3/4 gravel/peastone?

Or did they maybe backfill with 1' or so w/gravel and then push/backfill rest w/ soil from site? This is what you DON`T want.

That crack 'could' have been caused from the soil compacting/settling last month(s) does indeed create pressure against basement walls.

--Carefully read ALL of--

see 6th, 7th paragraphs

Unbiased links here folks....think about what they are trying to inform YOU about. Soil pressures on the OUTSIDE of basement walls...YOUR Foundation walls!

Sure there are other important factors when building houses/walls incl`g site soil testing,footing depth & thickness, using--not using steel reinforcing rod in basement walls,also....what is the Best backfill to have on the Outside of Your basement Walls, which applies the LEAST lateral load & which provides excellent `n immediate drainage along the walls.

There is a SIGNIFICANT difference between damproofing and Waterproofing, oh YES there is!

see first few paragraphs and also 5th P " To permanently Stop water & water vapor from entering your foundation walls, you need to WATERPROOF them. Damproofing is an inexpensive way to meet the 'lowest' minimum standard of the building code"



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.


type the code from the image


Post_new_button or Login_button

All bookworms need a good bookmark that inspires them to keep reading. To make this colorful bookmark, cut a rectangular p... It turns out that many bath and kitchen cleansers contain chemicals that are dangerous to the skin and eyes, and often pro... So often we paint tiny nooks white to make them appear larger, but opting for a dark, dramatic wall color like this one—Be... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon