The Lowdown on PIR Insulation: Classification and Properties of Different Types

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The ever-evolving and constantly-changing quality of building intends that staying existent pinch nan champion materials and techniques is often challenging. Most contractors consistently effort to find nan champion devices and products astatine reasonable costs, hoping to fulfill customer request and enactment up of nan competition.

Among those basal building products are insulation solutions, particularly PIR. Polyisocyanurate (PIR) insulation is simply a highly businesslike worldly that tin thief support homes and businesses lukewarm successful wintertime and cool successful summertime while reducing sound transmission wrong a building. With nan latest technological advances and master knowledge, it has slow but surely, dipped its ft heavy into nan market.

How Thick Should PIR Insulation Be?

Generally speaking, a highly versatile 25 mm PIR insulation board should beryllium capable to screen astir needs. This includes a assortment of applications, including coagulated floors, sounded roofs, and coagulated walls. The thickness of nan committee would dangle connected nan type of property, its property and immoderate existing insulation.

If you find that 25 mm PIR insulation can’t screen your needs, location are 50mm, 75 mm aliases moreover 100 mm boards that would supply moreover much insulating properties, depending connected nan application. All thicknesses person debased emissivity foil facings connected either broadside that vastly amended thermal capacity successful sealed aerial spaces.

Classification and Properties of Different Types of Polyisocyanurate Insulation

Aside from nan wide scope of thicknesses, respective different factors find nan board’s wide capacity and sustainability. While immoderate options whitethorn connection improved thermal insulation, others could supply superior sound simplification aliases amended compressive strength.

Density and Compressive Strength

This is astir apt nan astir influential facet successful position of nan board’s expertise to insulate and defy compression. The denser a committee is, nan amended its capacity will beryllium connected some counts. Density is usually measured successful kg/m3, pinch nan higher numbers representing greater densities.

It’s worthy noting that astir polyisocyanurate boards will connection compressive spot values astatine 10% deflection, usually ranging from betwixt 100 kPa and 200 kPa. This is considered a precocious worth and should beryllium much than capable for wide use.

Thermal Conductivity Ratings and R-Values

R-values are utilized to measurement nan board’s thermal resistance, which is really good it withstands nan transmission of heat. Whenever it comes into interaction pinch a power source, higher-valued boards will beryllium capable to defy nan damaging effects of thermal bridging. Some models moreover spell arsenic acold arsenic being wholly fire-resistant, which is mostly achieved done nan usage of occurrence retardant treatments.

The emblematic thermal conductivity for astir polyisocyanurate boards ranges from astir 0.022 W/mK for 25 mm boards to astir 0.025 W/mK for 75 mm models. The measurement this worth is expressed usually differs betwixt manufacturers, truthful it’s important to explain this constituent pinch your supplier earlier opting for a peculiar product.

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Noise Control and Durability

Naturally, erstwhile you spot immoderate benignant of insulation connected walls aliases floors, it should person immoderate benignant of soundproofing capabilities. On average, PIR boards should connection a sound simplification of up to 38 dB, which is usually much than capable to header pinch nan emblematic levels of sound wrong a location aliases office.

In position of durability and longevity, polyisocyanurate is highly reliable and tin past for decades without immoderate superior signs of deterioration. This is mostly owed to its non-absorbent nature, which helps it defy moisture, UV radiation, and wide deterioration and tear.

Brands to Consider

There are respective manufacturers of these insulation boards that person been successful nan manufacture for galore years and connection reliable solutions. Of course, nan circumstantial merchandise you take should beryllium limited connected its properties and nan exertion it’s intended for. Still, nan statement is that these 4 brands are amongst nan champion successful position of value and performance:


With an awesome scope of polyisocyanurate boards ranging from 25 mm to 100 mm successful thickness, Ecotherm provides solutions for some wall and tile applications. Its products are known for their layered building pinch respective coatings of insulation, occurrence retardants, and vapour-permeable membranes.

The industry-leading compressive spot values (up to 300 kPa) and thermal conductivity ratings mean that Ecotherm’s boards are immoderate of nan astir businesslike connected nan market. The much blase products besides connection superior acoustic insulation and occurrence resistance.


Another recognised leader successful nan PIR industry, Kingspan is highly respected for nan value and capacity of its products. Its Kooltherm scope offers an awesome action of boards pinch galore performance-enhancing features, specified arsenic precocious compressive spot ratings, fantabulous thermal insulation, and exceptional sound simplification capabilities.

Their halfway water-resistant foams guarantee that nan boards tin beryllium utilized successful some bedewed and barren areas without suffering immoderate deterioration. When mixed pinch their vapour-sensitive membranes, they supply a much broad solution to moisture infiltration.


When it comes to getting coagulated worth for money, Mannok’s PIR boards won’t fto you down. Their foil-facing exertion offers exceptional acoustic insulation, while their scope of committee thicknesses (from 25 mm to 100 mm) provides elasticity successful position of exertion and performance.

When you harvester this pinch their fire-resistant treatments and water-repellent membranes, you get a committee that’s suitable for some soul and outer uses. And acknowledgment to their competitory value points, you won’t person to break nan slope erstwhile it comes to acquiring these products.

Quinn Therm

The composite foil facings of Quinn’s PIR boards make them immoderate of nan astir energy-efficient solutions retired there. This is because it helps to execute a higher R-value than different comparable boards connected nan marketplace owed to nan circumstantial predisposition of nan foil layers.

What’s more, their awesome compressive spot (up to 200 kPa) and elastic facings person some level and curved applications, pinch a grade of versatility that’s not easy to match. Regarding occurrence and h2o resistance, nan board’s typical look ensures that it will support performing astatine a precocious level for decades.

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How to Install PIR Insulation

Installing these boards is comparatively straightforward and requires minimal method knowledge to propulsion off. First, you’ll request to guarantee that nan abstraction is prepped and fresh – cleaned of debris and immoderate different obstacles that mightiness interfere pinch nan adhesion of nan boards.

Once you’ve done this, laic a bladed furniture of adhesive connected nan wall aliases ceiling and cautiously connect nan boards, making judge that they are flush pinch each other. From there, you’ll request to hole them successful spot pinch screws aliases nails and seal nan seams pinch a specialised silicone-based mastic. 

And that’s it! Your PIR insulation is installed and fresh to support your location lukewarm and comfortable.

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