A network of certified installers for PUR foam throughout Poland

When comparing quotations, consider not only the price but also the type of foam, its thermal conductivity (lambda), layer thickness, protective measures, substrate preparation, handover documentation, warranty and the team’s experience with similar projects. Differences in these areas can completely change the actual value of a quotation.

A good offer should be specific and understandable. If the contractor avoids answering about the material, thickness, details or application conditions, this is a red flag. In spray insulation, the quality of workmanship is as important as the product itself.

PUR foam may only be sprayed when conditions meet the requirements of the material and equipment. Substrate temperature, component temperature, humidity, ventilation and safe working conditions for the team all matter. Application conditions need particularly careful monitoring in winter.

If the building is too cold or damp, the contractor should postpone the work or specify the preparation needed for correct application. Rushing the work in unsuitable conditions can compromise the quality of the insulation.

Ventilation becomes even more important once a building’s airtightness has been improved. Insulation reduces uncontrolled draughts, but it does not replace air exchange. If ventilation previously relied mainly on air leaking through the building fabric, moisture or comfort problems may become apparent after an energy retrofit.

Before undertaking extensive insulation work, check that the natural ventilation works properly or consider mechanical ventilation. A good insulation contractor should raise this issue even if ventilation is outside the scope of their service.

Foundations can be insulated with a suitable closed-cell foam, but not every PUR foam is suitable for this application. The choice of product and installation method depends on soil and groundwater conditions, the design of the building element and the material’s technical data sheet.

Thermal insulation does not automatically replace waterproofing. Before backfilling, provide the protection against water and mechanical damage specified in the design and check that the applied layer is continuous.

At the final inspection, check the continuity of the insulation layer, its junctions with structural members, corners, service penetrations, the wall plate area and the areas around roof windows. The average thickness is only part of the assessment: there must also be no voids or interruptions at points that ensure the airtightness of the building element.

Ask for photographic documentation and a description of the material used. Taking photographs before the insulation is covered is good practice, as assessing it afterwards will be much more difficult.