Where you have a level and moisture-free subfloor, Basic 20 underlay is the optimum choice. It’s inexpensive, offers good comfort and support, and has reasonable soundproofing and thermal qualities too. It’s particularly useful for upper floors where moisture isn’t an issue. Tog rating: 0.84.
Woodpecker Basic 20 Underlay
£1.70 /m² (inc vat)
Comes in 15m2 Rolls