Tpo Roofing Over Rigid Insulation

By itself tpo roofing doesn t provide much insulation so many installations include a layer of rigid foam insulation which is secured to the roof with mechanical fasteners or adhesive.

Tpo roofing over rigid insulation.

Install no more insulation than can be covered during the same working day. Early in the days of polyiso insulation production the product could suffer from edge collapse facer delamination and. Polyiso products are a reliable alternative to other fibrous and rigid foam plastic insulation as they can offer the following benefits. The first step with roof installation is to prepare the roof deck by getting rid of all dirt dust and contaminants.

If insulation layer is 1 or less taper 12 from the drain bowl. With the ability to be installed in a variety of roofing applications thermoplastic systems combine durability and flexibility with an already easy to install and versatile product. Achieves fm vsh approval with adhered 60 or 80 mil smooth back jm tpo membrane and standard jm tpo membrane adhesives when 4 x4 panels are adhered in low rise foam adhesive ribbons 12 o c. Taper roof insulation to drain sumps using tapered edge strips.

Tpo s long term heat uv and natural fungal resistance plus flexibility without need for plasticizers also make tpo a reliable low slope roofing system. Tpo pvc pvc based thermoplastic roofing membranes provide strength and flexibility along with superior weatherability characteristics. In addition national roofing contractors association nrca has issued bulletins over the years recommending the use of cover boards to minimize damage to polyiso insulation caused by high foot traffic and other impacts. It can also be used as a roofing cover board and in building envelope applications.

Best to use 2 part adhesive foam to attach insulation to roof substrate and then glue tpo over iso this way there are not screws under tpo minimizing punctures from underneath. The bottom layer of a single ply membrane roofing system is the roof deck or substrate. Coated fiberglass facer ideal for fully adhered systems provides a broader compatibility and higher performance with. If insulation thickness exceeds 1 taper 18 from the drain bowl.

I suggest you space our insulation fasteners so that deck framing is not directly over screws plates otherwise it may tear through membrane. Tpo roof insulation in the midwest is typically polyisocyanurate board insulation also referred to as polyiso or just iso. Meets the requirements of astm c 1177. Insulation over 2 thick needs to be installed in two layers with staggered board joints per the roofing manufacturer s instructions.

It is a thermoset closed cell foam that is an optimal insulation solution for low slope roofs. Heat welded seams provide superior strength. Just before installing the membrane you typically install a slipsheet a low friction barrier that allows the roofing to expand and contract freely. Rigid foam insulation installation prepare roof deck.