Tall Pine Roofing installs TPO roofing systems on commercial buildings, condominium associations, and flat residential roofs throughout southern New Hampshire and southern Maine. TPO has become one of the most widely installed single-ply membranes in the country, and on the right building it is an excellent choice — particularly where cooling costs matter.
We are an Owens Corning Preferred Contractor, fully insured, and a member of our management team is on site for every job. Estimates are free and carry no obligation.
What TPO Roofing Is
TPO stands for thermoplastic polyolefin. It is a single-ply membrane, typically white, that arrives in wide rolls and is fastened or adhered across the roof deck over insulation.
The characteristic that sets it apart is how the seams are joined. TPO sheets are heat-welded with hot air, fusing adjacent sheets into a single continuous piece of material. There is no adhesive or tape at the seam to age, dry out, or let go. On a flat roof, seams are where failures almost always begin, so a welded seam is a meaningful structural advantage rather than a marketing point.
For a plain-language explanation of the material itself, see our article on what TPO roofing is.
Why Building Owners Choose TPO
- A reflective surface. White TPO reflects a large share of the solar energy that lands on it instead of absorbing it. On a building with air conditioning and significant roof area, that reduces summer cooling load in a way a dark roof cannot.
- Heat-welded seams. Continuous welded sheets rather than adhered laps, which removes the most common point of long-term failure.
- Resistance to grease, chemicals and punctures. This matters on restaurants and buildings with kitchen exhaust, where some other membranes degrade.
- Light weight. TPO adds little load to the structure, which is useful on older buildings and in a region where the roof also has to carry snow.
- A clean appearance. On buildings overlooked by neighbouring windows or upper floors, the finished look is tidier than many alternatives.
TPO or EPDM? An Honest Comparison
We install both, and we do not have a favourite we push regardless of the building. They suit different situations, and the honest answer depends on your roof.
| Consideration | TPO | EPDM |
|---|---|---|
| Colour and reflectivity | Usually white and highly reflective — lowers cooling load | Usually black and absorbs heat — can help shed snow |
| Seams | Heat-welded into one continuous sheet | Adhered with tape or adhesive |
| Cold-weather flexibility | Performs well | Exceptional — rubber stays flexible through deep freeze-thaw cycles |
| Repairability | Straightforward, but welding needs the right equipment and technique | Very straightforward to patch |
| Track record | Widely installed; formulations have improved considerably over time | Decades of documented performance in New England |
| Grease and chemical resistance | Strong | Weaker — a poor match near kitchen exhaust |
The short version for this climate: if your building is air-conditioned with a large roof area, or has kitchen exhaust, TPO is usually the stronger choice. If the priority is proven cold-weather flexibility and simple repairs, EPDM remains an excellent option. We will tell you which we would put on the building if it were ours.
One point worth understanding about reflectivity in New Hampshire and Maine: a white roof genuinely reduces summer cooling costs, but it also holds snow longer than a dark roof does, because it absorbs less heat on bright winter days. On most commercial buildings that is a fair trade. On a structure where snow load is already a concern, it is worth discussing before you decide.
How We Install TPO
A membrane is only as good as the system beneath it and the detail work around its edges. Our installations cover:
- Deck assessment and repair. We check the condition of the existing deck before anything goes over it. Covering soft decking produces a roof that fails early.
- Insulation and slope. Correct insulation thickness, and tapered insulation where drainage needs improving. Ponding water is one of the main reasons flat roofs fail here.
- Attachment method. Mechanically attached or fully adhered depending on the building, its exposure, and wind uplift requirements.
- Welded seams, tested. Seams are welded and then probed to confirm the weld is continuous.
- Flashings and penetrations. Curbs, drains, vents, HVAC units and parapet walls. This detail work is where most leaks originate, and it is where the time goes on a good installation.
TPO is one of several systems we install as part of flat roof replacement, alongside our wider commercial roofing work for businesses, condominium associations and churches.
TPO Roofing FAQs
How Long Does a TPO Roof Last?
Service life depends far more on membrane thickness, the quality of the installation, and how well the roof drains than on the brand name. A thicker membrane installed over proper insulation with real slope outlasts a thin one laid over a flat, ponding deck by a wide margin. We will tell you which thickness we are quoting and why, rather than leaving it buried in the specification.
Can TPO Go Over My Existing Roof?
Sometimes, depending on the condition of what is already there and how many layers the building code allows. It saves tear-off cost, but it also means nobody inspects the deck underneath, and any wet insulation stays wet and keeps degrading. We will give you a straight assessment of whether a recover is sensible on your building or whether it would just postpone a larger bill.
Does a White Roof Make Sense in a Cold Climate?
It is a fair question, and the answer is usually yes for commercial buildings. Most of the savings come in summer, when cooling is doing the work; in winter, a roof under snow is insulated by the snow regardless of its colour, and the heat retained by a dark membrane on a cold day is modest compared with what proper insulation provides. The place to spend money on winter performance is the insulation below the membrane, not the colour above it.
Can You Work Around an Occupied Building?
Yes. Most commercial and condominium work happens while people are using the building. We sequence the work so the roof is never left open, plan material staging and access with you beforehand, and keep tenants or staff informed about what is happening and when. For condominium associations we are happy to provide written scopes suitable for board review.
Get a Free TPO Roofing Estimate
Tell us about the building and we will come look at it, assess the existing system, and give you a written scope and price. If another membrane suits the building better, we will say so.
