BOKKA Blog
Latest articles on PIR insulation, construction industry guides.
1000 m² Warehouse — termPIR® or Sandwich Panels? Cost, Time, Operation Comparison
1000 m² warehouse: termPIR® in masonry construction or GS insPIRe / GS MW sandwich panels? Comparison of cost, build time, 10-year operation.
Passive house — termPIR over-rafter system for EUco 15 kWh/m²/year
PHI passive standard: roof U ≤ 0.10. Practical termPIR over-rafter system for EUco 15 kWh/m²/year. Thickness chart, cost, AL vs MAX 19 alternatives.
Thermomodernization tax relief 2026 — limits, VAT invoices, how to claim in PIT
Thermomodernization tax relief 2026 up to 53,000 zł per person. What qualifies (PIR boards, tapered wedges), invoices, when to deduct in PIT-37/36/36L/28.
termPIR® AL vs termPIR® MAX 19 — when is it worth paying extra for λD 0.019?
Comparison of termPIR AL (λD 0.022) and MAX 19 (λD 0.019). When the 30% premium pays off in partition thickness, when it doesn't. Roof, wall, floor scenarios.
How to read DoP, ETA and AVCP certificate — a guide for designers and buyers
DoP, ETA, AVCP, PZH hygiene certificate — what they mean, how to verify, what's missing. Step-by-step guide for designers and buyers of construction materials.
BROOF(t1) for PIR Roofs — 8 Proven Coverage Configurations + Test Conditions
BROOF(t1) is valid only for the tested combination: covering + substrate + PIR thickness + slope. Table of 8 proven configurations: termPIR + PVC/TPO/EPDM/bitumen.
EI 120 for sandwich panels — under what conditions? 10 pitfalls of fire classification
EI 120 class for sandwich panels applies only under test conditions: span, fixings, joints, orientation. Designer's guide with table of real classes.
Sandwich panels second grade — what it exactly means and when it makes sense
Second grade sandwich panels: where defects come from, when λ is preserved, no DoP/no warranty claims, where to use (garage, carport, farm cold room), where not allowed.
PIR vs EPS/XPS vs Mineral Wool: ROI Analysis for Designers | BOKKA
B2B comparison of PIR boards, EPS/XPS and mineral wool for designers. λD, fire class, acoustics, EPD, TCO. Hard numbers for WT 2021 and EPBD 2030.
EPBD 2030 & Zero-Emission Buildings — Role of PIR Boards | BOKKA
EPBD Directive 2024/1275 requires zero-emission buildings from 2030. See how PIR boards (λD 0.019–0.022) meet ZEB and WT 2021 requirements.
Energy Retrofit Before the 2026/2027 Season — Planning Guide
Spring 2026 retrofit — why May/June is the optimal window. PIR boards λD 0.022, WT 2021 U-values, thickness selection and schedule before heating season.
izoGRASS® PIR Boards Without Facing — Insulation Core | BOKKA
izoGRASS® PIR boards without facing: λD 0.027 W/(m·K), fire class E, used as cores in roof and wall systems. Parameters, standards, installation.
PIR Tapered Insulation izoGRASS® — Flat Roof Drainage & Insulation
PIR tapered insulation izoGRASS® — flat roof slope shaping, λD 0.027 W/(m·K), WT 2021 compliance. Layout design and thickness selection guide.
Silesia Anti-Smog Resolution and PIR Thermal Upgrades | BOKKA
Coal ban in Silesia, mandatory CEEB registration and WT 2021 requirements. How termPIR® PIR boards support thermal upgrades and low-emission goals.
WHO 2021 Air Quality Guidelines and Thermal Retrofit in Poland
WHO's tighter PM2.5 and NO₂ limits force deeper retrofits. See how PIR boards cut CO₂ emissions from buildings and help fight smog in Poland.
Energy Retrofit with PIR Boards and WT 2021 in Practice | BOKKA
Energy retrofit step by step: audit, U-value per WT 2021, selecting PIR boards (λD 0.022) for walls, roofs and foundations. Concrete thicknesses and standards.
Building Insulation for Heatwaves — PIR Boards & Summer Comfort
How to protect a building from heatwaves? PIR boards with λD 0.022 W/(m·K) limit overheating, cut cooling costs and meet WT 2021 requirements.
Insulating a Steel Garage with PIR Boards — B2B Guide | BOKKA
How to insulate a steel garage effectively? PIR boards with λD 0.022 W/(m·K), internal and external mounting, thicknesses, U-values and fire classes.
Smog in Kraków 2024 — AGH study and the role of thermal upgrades | BOKKA
AGH study for Kraków: PM10 -45%, PM2.5 -43%, B(a)P -42%. The role of thermal upgrades and PIR insulation boards in reducing low-stack emissions.
Smog and Allergies — How PIR Thermal Upgrades Cut Emissions | BOKKA
Jagiellonian University study: PM2.5 dust triggers allergic reactions in 75% of people. PIR thermal upgrades (λD 0.022) cut low-stack emissions and meet WT 2021.
Dog House Insulation with PIR Boards — Practical Guide | BOKKA
How to insulate a dog house with termPIR® AL boards. Lambda 0.022, moisture resistance, thickness selection, step-by-step installation. BOKKA technical guide.
Basement Ceiling Insulation with PIR Boards — Selection & Installation
How to insulate a basement ceiling with PIR boards? λD 0.022, U ≤ 0.25 W/m²K per WT 2021, thickness selection, installation, thermal bridge elimination.
Roof Thermal Insulation — Why PIR Boards Set the WT 2021 Standard
Roof insulation with PIR boards — λD 0.022 parameters, thicknesses, U-values per WT 2021, over-rafter and under-rafter installation. Practical B2B guide.
Window Replacement and Warm Installation with PIR Insulation | BOKKA
Window replacement with warm installation in the PIR insulation layer. Eliminating thermal bridges at reveals, WT 2021 parameters, installation details.
Inverted Roof Insulation with PIR Boards — Layers, U-value, WT 2021
Inverted roof with PIR insulation — layer build-up, thickness selection, U ≤ 0.15 W/m²K per WT 2021, tapered insulation and load analysis. B2B guide.
PV on PIR Sandwich Panel Roofs — Mounting and Design | BOKKA
How to correctly design a PIR sandwich panel roof for a PV installation — facing thickness, fixings, load capacity, fire classes.
Attic Insulation with PIR Boards — WT 2021 Compliance | BOKKA
Attic insulation with PIR boards — over-rafter and under-rafter methods, λD 0.022 W/(m·K), meeting WT 2021 U≤0.15 W/m²K. BOKKA technical guide.
Terrace Insulation with PIR Boards — Layers, U-value, λD | BOKKA
How to correctly insulate a terrace above a heated room? Cross-section layers, PIR board selection, λD 0.019–0.022, U ≤ 0.15 W/m²K per WT 2021.
Over-rafter PIR Roof Insulation — Technical Guide
Over-rafter PIR insulation method: layer build-up, λD 0.022, WT 2021-compliant U-values, thickness selection and comparison with mineral wool and XPS.
Thermal Conductivity λ — B2B Guide to PIR Insulation | BOKKA
Thermal conductivity λD explained: how to read it, how to select PIR insulation for WT 2021 compliance. Material comparison, tables, FAQ for B2B.
PIR Insulation for Ground-Bearing Floors — WT 2021 Compliance
How to insulate a ground-bearing floor to WT 2021. PIR board selection, required thicknesses, U ≤ 0.30 W/m²K, mechanical loads and underfloor heating.
Smog in Poland & Thermal Upgrades — the Role of PIR Boards | BOKKA
2024 smog report: how energy retrofits with PIR boards (λD 0.022) cut PM2.5 and benzo(a)pyrene emissions. WT 2021, U-value and ETICS requirements.
Energy Audit of a Building — Thermal Retrofit with PIR
Energy audit step by step: report scope, thermographic surveys, PIR insulation selection for WT 2021. A practical B2B guide for investors.
Thermal Bridges — How to Eliminate Them with PIR Boards (WT 2021)
Thermal bridges account for up to 30% of heat loss. See how continuous termPIR® λD 0.022 insulation eliminates linear and point bridges per WT 2021.
Thermal Imaging Survey: Detecting Thermal Bridges | BOKKA
Thermal imaging surveys reveal thermal bridges, insulation defects and heat losses. Learn how to read thermograms and when to commission a diagnostic check.
PIR Boards for Flat Roofs — Insulation, U-value, Systems | BOKKA
PIR boards for flat roofs: termPIR® AL, Pro-F and izoGRASS® tapered insulation. λD 0.022, U≤0.15 W/m²K per WT 2021, FM Approved, BROOF(t1).
Over-Rafter Roof Insulation with PIR Boards — Complete Guide
Over-rafter installation of termPIR® boards eliminates thermal bridges and meets WT 2021 at minimum thickness. Parameters, U-value, installation technology.
Retrofitting Old Houses with PIR Boards — Energy Upgrade Guide
How to effectively insulate an old house with PIR boards? Heat-loss diagnosis, λD selection, thickness, WT 2021 compliance. A practical B2B retrofit guide.
PIR Insulation for Ground-Bearing Floors — WT 2021 Guide
How to insulate a ground-bearing floor with PIR boards per WT 2021. Variants, thicknesses, U-values, λD 0.022 and installation guidelines. B2B guide.
Building Law Reform & PIR Insulation: Impact on B2B Investors
Polish Building Law reform: project split, simplified procedures, WT 2021. How it affects PIR boards and sandwich panel selection in B2B investments.
PIR Board Applications — Where Polyurethane Insulation Excels | BOKKA
PIR boards in residential construction, warehouses, cold stores and livestock buildings. λD from 0.019, thicknesses, fire classes and variant selection.
termPIR® ETX — PIR Boards with Glass Fleece for ETICS | BOKKA
termPIR® ETX specs: glass fleece facing, λD 0.025–0.027, ETA 17/0066, step-by-step ETICS installation. Parameters, thicknesses, standards.
termPIR® AL — PIR Insulation Boards with λD 0.022 | BOKKA
termPIR® AL PIR boards — λD 0.022 W/(m·K), gas-tight Al facing, thicknesses 20–250 mm, FIT/LAP/TAG edges. Parameters, applications, installation.
How to Get Rid of Martens in the Attic? PIR as a Barrier
Stone martens in the attic — how to evict them effectively and humanely? See why rigid PIR boards form a barrier resistant to martens and rodents.
Clean Air Programme 2024 — Energy Retrofit with PIR Boards
Poland's Clean Air programme and energy retrofit: funding rules, energy audit and selecting termPIR® PIR boards for roof, slab and walls per WT 2021.
PIR Sandwich Panels in Agricultural Construction | BOKKA
PIR-core sandwich panels for agricultural construction — technical parameters, fire classes, EN 14509 and WT 2021 compliance. A practical B2B guide for investors.
Sandwich Panel Building Envelope — Selection Guide | BOKKA
PIR and mineral wool sandwich panels for warehouses, halls and chillers. Parameters, λD, fire classes, joint locks and project-based selection guide.
Pitched Roof Insulation with PIR Boards — Methods & Specs
Pitched roof insulation with PIR boards: comparison of over-rafter, between-rafter and under-rafter methods, thicknesses, λD 0.022 and WT 2021 requirements.
Attic Insulation Thickness per WT 2021 — PIR Boards | BOKKA
How thick should attic insulation be? Check WT 2021 requirements (U ≤ 0.15 W/m²K), a comparison of materials and termPIR® PIR board thicknesses.