Screed Over Concrete
- EPS 50–100mm (depends on U-value target)
- DPM required
- Edge strip mandatory
Insulation & Ancillaries
Floor insulation boards (EPS & PIR), perimeter edge strips, damp-proof membrane, pipe conduit, manifold covers. Essential for heat retention and Part L compliance.
Floor Insulation Boards
| Type | Thickness | Size | R-Value | Code | Trade Price/m² |
|---|---|---|---|---|---|
| EPS70 | 25mm | 1200×600mm | 0.70 | INS-EPS25 | £4.85 |
| EPS70 | 50mm | 1200×600mm | 1.40 | INS-EPS50 | £7.20 |
| EPS70 | 75mm | 1200×600mm | 2.10 | INS-EPS75 | £9.80 |
| EPS70 | 100mm | 1200×600mm | 2.80 | INS-EPS100 | £12.50 |
| PIR | 25mm | 1200×600mm | 1.10 | INS-PIR25 | £8.90 |
| PIR | 50mm | 1200×600mm | 2.25 | INS-PIR50 | £14.50 |
| PIR | 75mm | 1200×600mm | 3.35 | INS-PIR75 | £19.80 |
Perimeter Edge Insulation
| Product | Dimensions | Length | Code | Trade Price |
|---|---|---|---|---|
| Edge Strip (PE foam) | 150mm × 8mm | 25m roll | EDG-150-25 | £18.50 |
| Edge Strip (PE foam) | 150mm × 10mm | 25m roll | EDG-150-10-25 | £22.00 |
| Edge Strip with Apron | 150mm × 8mm + 100mm apron | 25m roll | EDG-APRON-25 | £28.50 |
Damp-Proof Membrane & Conduit
| Product | Spec | Size/Length | Code | Trade Price |
|---|---|---|---|---|
| DPM 1200 Gauge | 300µm polythene | 4m × 25m (100m²) | DPM-1200 | £42.00 |
| DPM 300µm Tape | Jointing tape | 75mm × 50m | DPM-TAPE | £8.50 |
| Pipe Conduit 25mm | Corrugated, split | 50m coil | CON-25-50 | £35.00 |
| Pipe Conduit 28mm | Corrugated, split | 50m coil | CON-28-50 | £38.00 |
| Manifold Cover Box | Recessed, white | 400×300×120mm | MCB-01 | £45.00 |
| Manifold Cover Box | Surface, white | 450×350×130mm | MCB-02 | £38.00 |
Insulation Selection by Floor Type
Timber Suspended Floor
- PIR 50–75mm between joists
- Alu-foil faced for reflectivity
- Edge strip at perimeter
Heat Pump Systems
- Minimum 100mm EPS or 75mm PIR
- Lower flow temps = more insulation critical
- Check Part L / Part O requirements