Flat Roof Tapered Insulation Board

We are insulating a flat roof with tapered rigid insulation over a moisture barrier and then capped with modified bitumen.

Flat roof tapered insulation board.

Insulfoam i vii ii ix xiv and xv. Xtratherm offer a comprehensive range of high performance pir flat roof insulation boards that includes the xf range of tapered insulation providing comprehensive solutions for all flat roof projects whatever the choice of waterproofing system with environmental scoring within the bre green guide. The boards can simply be installed on top of the existing waterproofing layer. To drain and insulate dead level roof decks.

It is readily available in the two most popular and efficient tapers 1 8 3 18 mm per foot 305 mm 1 and 1 4 6 35 mm per foot 3 18 mm 2. Tapered insulation is also ideal for existing roofs that may not already incorporate a structural fall. High performance tapered insulation for flat roofs kingspan thermataper tt47 is a high performance insulation with a fibre free rigid thermoset polyisocyanurate pir core. Factory cut taper that is easy to install and cut builds slope into an otherwise flat roofing system allowing water to drain freely off the roof.

With a thermal conductivities as low as 0 024 w mk it is designed to enhance water drainage for flat roofs waterproofed with full adhered single ply partially bonded built. Tapered expanded polystyrene eps roof insulation was developed more than 30 years ago with a dual purpose in mind. By creating appropriate falls and drainage a flat roof is more likely to last for its designed life by channelling water to outlets efficiently. Standard tapered insulation is typically an iso board with fiberglass mats on both sides.

It can also be made using eps rigid or high density styrofoam. Flat tapered eps roofing insulation insulfoam taper is an engineered insulation consisting of a superior closed cell lightweight expanded polystyrene eps. Thus a 0 5 1 5 inch board would cost about 80 85 per 100 sq ft. Because this is a specialty product it costs about 60 80 more than a flat foam insulation of the same thickness.

When correctly installed tapered insulation helps eliminate problems due to ponding water and can extend the longevity of your low slope roofing system. However we lose r value where the taper is thinnest and need to insulate under the sheeting. Insulfoam taper is cut from the same high quality eps as our flat insulroof products and meets or exceeds the requirements of astm c578 standard.