General Foundation Information Flashcards
The concrete slab in a foundation (commercial or private) must be an absolute minimum of?
At least 100mm (generally 150/200mm)
A DPC (Damp proof course) should run at least how high in foundations?
150mm (used to protect the bottom of the building from splash back from rain)
What is the purpose of a DPC (Damp proof course)?
To stop moisture rising through the foundation walls
What is the absolute minimum concrete slab depth when using a concrete based foundation?
100mm (generally 150-200mm though)
Without a DPM moisture would be able to do what?
Rise up through the foundation walls to make the inside walls below the DPC damp
Serve as a barrier to damp.
What is the primary purpose of the use of hardcore on site?
To raise the level of the top of the concrete of the foundation (to that of the dpc in walls)
Where can a DPM be placed in relation to the concrete slab?
Under or over (or in the slab)
Why do we link the DPM to the DPC in walls?
To provide a continuous seal against moisture/damp in the foundation
What is hardcore made of?
Broken brick, stone or concrete
Where the foundation has trouble settling (on relatively unstable land), what should be added to the concrete slab and footings?
Steel reinforcement
Why do we use insulation around or under the edges of a solid floor?
As it will significantly reduce heat losses
How do we avoid a cold bridge across the foundation wall and the edges of the slab?
- Fit insulation around the edges of the slab
2. Continue the insulation down inside the cavity
