1. Lesson Summary
M. S. Martin 21/11/07

2. Flooring – click your mouse to bring up each point
Two main types of construction
Platform flooring &
Cut in Floors (typically strip flooring is used)
Click mouse again to look at the sketches opposite & review your notes from P20
Cut in floors
Platform Floors

3. Strip Flooring Face fixed or secret nailed Undercut but joints or
Laying & Clamping – click mouse to bring in each point
Select the longest run of flooring
String a line through middle of building parallel to outside walls
Lay a run of boards along this line
Note: in small rooms you might start from one wall and work towards the other
Cut and lay say 4 runs of board on each side of centre
Cramp & fix
Continue laying & cramping boards in sections of 6 to 8 board maximum
When you get close to the wall you will need to use an alternative to floor clamps, timber or a chisel
Undercut but joints or
Or use end matched boards

4. Platform floors
Types
Structural Grade particle board
Plywood
Compressed cement sheet
Sheet sizes vary in thickness which effects joist span 450 or 600 centres

5. Calculations Review your workbook calc’s Look at the sketch below:
When working out quantities of floor boards to suit a particular room in a house, we calculate the amount of boards using effective cover per square metre of floor area, see the simple description below.
1.0 x 1.0 = 1.0m²
= 1.0m = 1000mm
For the purpose of the example, let’s say our floor boards have an effective cover of 86mm, therefore:
or =
Which means you can lay lineal metres of floor boards per / m² of floor area
Review your workbook calc’s
1.0m
1.0m

6. Practical Assessment Bearer & Joist exercise in basement
Demonstration of flooring clamps & strip flooring
Explanation of different set out for sheet flooring & strip.