Glencoe: 20

Question 1

Hydrostatic pressure

Answer 1

If water builds up on one side of a foundation wall, pressure created may force moisture through the concrete and into any joints

Question 2

Footing drains, (foundation drains or perimeter drains)

Answer 2

relieve pressure by allowing subsurface water the drain away from the foundation. Located near the outside face of footing

Question 3

Drains are required when?

Answer 3

For full height foundation walls and where a house is located near the bottom of a long slope that is subject to heavy runoff.

Question 4

Most new houses use a network of X pipes

Answer 4

4” plastic pipes that drain into the storm sewers but may run to daylight.

Question 5

4” foundation drain pipes have holes:

Answer 5

pointed down.

Question 6

Always lay X before laying drain pipe

Answer 6

2 inches of gravel.

Question 7

To keep water moving. The drain pipes should be sloped at least X” per foot

Answer 7

1/8” per foot.

Question 8

After drains are placed, they should be X

Answer 8

covered with filter fabric (geotextile or landscaping fabric) which allows water to pass but prevents tiny particles. The foundation is then backfilled to rough grade with dirt.

Question 9

Drain pipes should not empty into the X

Answer 9

drain field of a septic system, this is restricted by code because large amounts of water can damage the septic system,

Question 10

What is needed for basement beams or girders?

Answer 10

A wall notch or a beam pocket.

Question 11

What does a wall notch or beam pocket do?

Answer 11

A beam pocket is a notch created to support the end of a beam.
Allows the top of the grider to be flush with the top of the sill plate.

Question 12

A beam pocket or wall notch should allow at least X” of clearance at the sides and end of a beam.

Answer 12

1/2”
This allows for ventilation of moisture so the wood doesn’t rot. A waterproof membrane such as a roll roofing is applied under the end of the beam to reduce moisture absorbtion.

Question 13

Forms should not be removed until

Answer 13

the concrete has enough strength to support the loads of early construction.

Question 14

Leaving a formwork in place X

Answer 14

slows the loss of moisture which improves the strength of concrete.

Question 15

At least X days are required before forms can be stripped in temperatures above freezing

Answer 15

2 days preferably longer. A week may be required when temps are below freezing.

Question 16

Metal pry bars should X when stripping wood forms.

Answer 16

Not be used because they can easily damage the edges and faces of the panels.

Question 17

Use X to pry panels away from the concrete.

Answer 17

Wood wedges.

Question 18

Wall notches and beam pockets must provide X” minimum bearing.

Answer 18

4 inch.

Question 19

As soon as forms are removed, they should be

Answer 19

cleaned and inspected for damage to repair. Scrape the concrete residue with hardwood wedge. Avoid wire brush because it can damage the wood. Then recoat with form-release agent to prevent concrete sticking.

Question 20

Before full-height concrete foundation walls are backfilled, steps must be taken to protect them from

Answer 20

ground moisture.

Question 21

Dampproofing:

Answer 21

Required by code for all foundation walls. The walls are coated with a material that protects against ordinary seepage (which may occur after rain storm).
The coating should extend from the top of the footings to the finished grade level.

Question 22

When should damp proofing be applied?

Answer 22

It should not be applied until the surface of the concrete has dried enough, otherwise it may not stick.

Question 23

Most common dampproofing material:

Answer 23

black bituminious coating that is either sprayed or brushed over the walls.

Question 24

Where must greater efforts be made to protect the foundation?

Answer 24

Where the soil drains poorly, where the water table is high, or where living spaces will be located below grade.

Question 25

What type of greater efforts must be applied to foundations where soil drains poorly or water table is high?

Answer 25

Applying a waterproofing membrane to the foundation walls. This should extend from the top of the footings to the finished grade level. All joints in the waterproofing membrane must be overlapped and sealed with an adhesive suitable for the membrane materials.

Question 26

Types of adhesive suitable for the membrane in waterproofed foundations:

Answer 26

2-ply hot-mopped felts
55-lb rolled roofing
6-mil PVC or polyethylene sheeting
40-mil polymer-modified asphalt
60-mil flexible polymer cement
1/8” cement-based fiber-reinforced waterproof coating
60-mil solvent free liquid-applied synthetic rubber.

In some cases, multi layer combination of rigid insulation board, drainage media, and spray or sheet membranes.