Can you put TPO over existing roof?

If the existing roof is in good enough condition, a TPO membrane can beapplied over an existing roof system after an insulation board has been applied over anexisting built-up roof system or other single ply membrane.

Can TPO be installed on a sloped roof?

TPO and PVC are two great roofing membrane choices for low-slope applications (1/4:12 up to 4:12 range, or greater). They last a long time, and unlike competitor options like EPDM, they don't pull away from the edges or from pipe-penetrations in the roof.

Can you put TPO over EPDM roof?

Yes. Recovering with TPO is a great option for a building with an aging EPDM roofing system. It's easy. It's far less costly and disruptive than a full tear-off.

Does TPO need underlayment?

Thermoplastic Polyolefin (TPO)

TPO roofs can resist UV rays by reflecting the light off its surface. This makes TPO ideal for buildings that need an effective insulation system. TPO underlayment is relatively easier to install. A hot-air gun is used to melt the rubber down to fuse each sheet together.

Can you overlay TPO?

So, I guess the longer answer is Yes. You can apply spray foam over a TPO roof. At West Roofing Systems, we've installed spray foam roofs over popular single-ply membranes, including TPO, since 1979.

4 Reasons Why You Should Install TPO Roof

What is a TPO overlay?

Thermoplastic Polyolefin is a single-ply roofing membrane that is one of the fastest-growing commercial roofing systems on the market. TPO roofing systems are made up of a single layer of synthetics and reinforcing scrim that can be used to cover flat roofs.

Can you glue TPO on top of TPO?

A TPO roof can be installed fully-adhered, mechanically-attached or ballasted. When the TPO roof is fully adhered it means that the membrane was glued to the substrate using a special strong adhesive that creates a chemical bond with the TPO.

What goes under a TPO roof?

Can you install TPO over plywood?

TPO is a single-ply membrane that can be installed over the top of the plywood. Although there are different types of roofing material, like metal or wood shingle roofs, this type provides an alternative because it's much cheaper.

How do you install TPO roofing membranes?

Is TPO better than EPDM?

TPO has better dimensional stability than EPDM. EPDM is more likely to shrink which can cause a variety of problems on your roof.

Is EPDM cheaper than TPO?

EPDM roofs are the most economical choice for single ply roofing membranes. TPO roofing membranes are more expensive than EPDM. Regardless of which membrane you choose, it is better to spend more money and invest in a thicker membrane. Both EPDM and TPO roofs perform better and last longer if they are thicker.

What is better TPO or PVC roofing?

While PVC offers better resistance to puncture and weathering, TPO (like PVC) is recyclable and environmentally friendly. Its reflective surface reduces UV radiation and helps with energy efficiency.

How many years does a TPO roof last?

It comes in a variety of thickness ranging from 45 mil to 80+ mil which can fit within a wide variety of budgets. 80-mil TPO roofs come with up to a 25-year warranty and with the appropriate maintenance, it is not uncommon for a TPO roofing system to last as long as 30 years.

What is the minimum slope for a TPO roof?

Thermoplastic single-ply roofing systems are plastic sheets (PVC, TPO, CSPE) that are welded together with hot air. This creates a shingle sheet that provides the weather protection for the building. Both the Thermoset and the Thermoplastic must be installed at a minimum one- fourth-inch-per-twelve-inch slope.

Is TPO better than modified bitumen?

Unless you are on an extremely restricted budget and need the cheaper roofing material right now, TPO is a superior choice. When it comes to which is the better material, TPO wins on most points. Despite that, modified bitumen is still around, and there are still roofers who are happy to work with it.

How wide is a roll of TPO roofing?

Systems offered: PVC, TPO. Roll sizes (length and width): Roll widths are 10 feet and 6.5 feet. Roll lengths vary by membrane thickness, but range between 65 and 100 feet.

Is TPO a good roof?

TPO is very good at resisting dirt build-up, punctures, and tears as well. This means a strong roofing product that can save you money in the long run as the roof will need to be cleaned less often.

How thick is a TPO roof?

TPO is a type of roofing membrane that can come in a variety of thicknesses. The most common thickness is probably 60 mils. (A mil is a unit of measure where 1-mil is equal to 0.001 inches. So, a 45-mil roofing membrane is actually 0.045 inches thick; whereas a 60-mil membrane is 0.06 inches thick, and so on.)

Can you install TPO over tar and gravel?

The types of membrane roofing systems we install include PVC and TPO. Either of these are great replacements for tar and gravel and will ultimately benefit your commercial building in no time.

Is TPO compatible with asphalt?

*Note: EPDM, flexible (plasticized) polyvinyl chloride—PVC, uncured neoprene and TPO are not compatible with rubberized asphalt.

Can you put a metal roof over an existing metal roof?

As long as the original metal roof panels are not deteriorated from environmental conditions, a metal-over-metal retrofit can put virtually any type of metal panel over any type of existing metal panel.

Can TPO roofing be painted?

Then, based on recommendations from a national coating and paint company in Canada, the best paint to use to paint a TPO roof is elastomeric paint. If you use a good quality elastomeric paint, then that will eliminate the need to use a surface primer first.

How do you tell the difference between TPO and PVC?

While TPO and PVC are both in the thermoplastic, single-ply family, they are very different in their base chemical composition. TPO is made of ethylene propylene rubber and polypropylene, while PVC, also commonly known as vinyl, is composed of ethylene and chlorine.