Tredaire Gala 15sqm Sponge Rubber Carpet Underlay: 2/6 Standard Durability, 3/6 General Comfort, 7mm Thick, 1.19 Tog, 60lb, 1.37m x 11.00m Roll Suitable for stretch-fit installation of carpets. Perfect for lounge, dining room & main bedrooms. An excellent budget rubber carpet underlay. This 7.00mm Tredaire sponge rubber waffle underlay exceeds British Standards for Light Domestic underlays. Suitable for around the home but not recommended for staircases. Extremely popular as a guest bedroom underlay. Provides good heat & sound insulation capabilities.