IKO Undertile Felt 1F 15m is a great product. This product is used by roofers, underslating for use under tiles or slates this is either on an open rafter or on fully supported pitched roof applications.

• British made and is a British Standard product (formerly BS 747 Type 1F)
• Conforms to current building regulations
• Traditional secondary barrier against wind-driven snow and rain
• Can be used in all wind zones in ventilated situations