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When does condensation form on insulated wall panels with a mineral wool core and how can it be predicted?

Water on the internal lining does not necessarily mean a roof leak. Vapour can condense on a surface colder than the dew point, especially at the plinth, fastener or reveal. In a new building, both usage and moisture from construction work must be taken into account. Panel thickness alone does not describe the whole risk. Surface condensation occurs when the surface temperature falls below the dew point of the surrounding air. In a simplified example, for air at 20°C and 60% relative humidity, the dew point is approximately 12°C. This is the result of a psychrometric calculation, not a fixed temperature for every hall.

By |2026-11-14T10:37:31+01:002026-10-10|Knowledge base|Comments Off on When does condensation form on insulated wall panels with a mineral wool core and how can it be predicted?
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What should you include in a request for quotation for an integrated photovoltaic roof?

A good quote starts with a good description of the building and expectations. If each contractor receives different information, you will get figures that cannot be fairly compared. The request should specify the roof geometry, the condition of the structure, the energy requirements and the scope of work. It is also worth asking for a description of the servicing and documentation. This ensures the discussion concerns a complete system, not just the price of the active component. Provide the location, roof drawings, cross-sections and basic dimensions. Mark windows, chimneys, roof hatches and other obstructions. If it is a renovation, add photos and information about the existing covering and any known problems. The contractor should know whether they are quoting for a new structure, a material replacement or a more complex refurbishment.

By |2026-11-15T18:59:57+01:002026-09-30|Knowledge base|Comments Off on What should you include in a request for quotation for an integrated photovoltaic roof?
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How to choose roofing for an industrial hall or factory building

Start by considering what the hall is used for, since this sets the direction for choosing a covering. In an unheated building, trapezoidal sheet may be sufficient, whereas a heated one calls for sandwich panels or a build-up with structural sheet and PIR insulation. The price per metre alone should not decide. Support spacing, airtightness, acoustics and planned roof installations all count. A warehouse without heating, a workshop and a facility with a cold store each need a different covering, because temperature, water vapour, the nature of the work and aggressive substances matter.

By |2026-11-14T20:13:12+01:002026-09-05|Knowledge base|Comments Off on How to choose roofing for an industrial hall or factory building
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Why choose insulated sandwich panels for a façade?

A sandwich wall panel is a complete assembly: metal façade, insulating core and internal lining in one element. It simplifies enclosing a hall, workshop or other suitably designed building. Unlike T18 sheet, it provides insulation and load-bearing capacity, but fire requirements and details must be checked. Locks, coatings and joint tightness determine the outcome, so thickness alone does not settle the choice. A mineral wool core can be advantageous for fire and acoustics, while EPS is sometimes considered for cost reasons.

By |2026-11-14T20:14:17+01:002026-08-31|Knowledge base|Comments Off on Why choose insulated sandwich panels for a façade?
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When can second-grade 40 mm roof panels suit a new building?

A 40 mm roof sandwich panel from a cheaper batch may be tempting because of its low purchase cost, but its suitability depends on the entire roof slope. The thermal conditions inside, the loads, the geometry and the reason for the price reduction all need to be assessed. In a new building, it is better to carry out these checks before ordering the steel. Only then does the panel price become part of a meaningful comparison of options. An unheated storage facility and an all-year workplace have different requirements. A thickness of 40 mm alone does not confirm that the roof will provide the required insulation performance. Panel data and an assessment of the building envelope for the specific conditions are needed. Also consider the planned use, not just the first months after construction.

By |2026-11-14T16:50:00+01:002026-08-28|Knowledge base|Comments Off on When can second-grade 40 mm roof panels suit a new building?
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A roof without an overhang: what happens at the eaves?

A roof without eaves means the slope ends essentially at the wall line rather than beyond it. This arrangement still requires well-planned drainage and ventilation right at the façade. Gutters, flashings and air inlets must be resolved at the design stage, as must service access. Metal roof tiles can be suitable provided they match the pitch and details. What matters most is water runoff and continuous insulation where the roof meets the wall. Simply shortening the rafters is not enough, because runoff conditions and wall protection change.

By |2026-11-14T23:56:28+01:002026-08-16|Knowledge base|Comments Off on A roof without an overhang: what happens at the eaves?
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Planning repairs to damaged steel building cladding

A dent at the gate, a scratch on a panel or a rain streak do not mean the same type of problem. Repairing the cladding of a steel hall must begin with identifying the damage. Painting over the mark may improve the appearance, but it does not always restore the tightness and properties of the element. It is also important to determine the cause so that the same damage does not reappear. A sandwich panel consists of facings and a core that work together to carry loads. Surface damage does not necessarily mean the loss of all properties, but a deep dent requires a broader assessment. In a steel hall, the extent of the damage, its position relative to the supports and the condition of the connections must be checked. The colour of the mark alone does not determine the repair method.

By |2026-11-15T03:58:39+01:002026-08-15|Knowledge base|Comments Off on Planning repairs to damaged steel building cladding
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How an eaves flashing guides water into the gutter

The over-gutter strip directs water from the roof slope into the gutter and protects the roof edge from seepage, so its shape must suit the covering, pitch and gutter position. Check the bend geometry and its placement relative to the gutter, as these determine effectiveness rather than the metal strip alone. Also account for drainage from the underlay and the ventilation inlet, so water from the underlay does not end its run on timber or insulation. Separately, distinguish the over-gutter strip from the under-gutter strip, which shields a different part of the eaves.

By |2026-11-14T23:58:00+01:002026-08-14|Knowledge base|Comments Off on How an eaves flashing guides water into the gutter
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How do you calculate the cost of a photovoltaic roof over its entire service life?

The purchase price marks the start of the investment, but not its full cost. A photovoltaic roof will require servicing, and some equipment may need repair or replacement. At the same time, it serves as the roof covering and generates energy. A reliable comparison should cover both functions over the same period. There is no need to build a complicated model, but it is worth explicitly recording the costs, benefits and uncertain assumptions. Choose a common horizon for all the variants under consideration. Do not compare one solution over a short period and another over the entire expected life of the building. A distinction must also be made between the warranty period and the durability of each component. The covering, the active elements and the electronics do not have to share an identical service history.

By |2026-11-15T19:00:00+01:002026-07-23|Knowledge base|Comments Off on How do you calculate the cost of a photovoltaic roof over its entire service life?
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EPS, XPS or PIR: how to choose insulation for different parts of a new home?

In a new home, various insulation materials can be used if each one matches the conditions of its zone. A wall under render, a roof under a membrane and a floor loaded with equipment do not impose identical requirements. A comparison of EPS, XPS and PIR is worth starting with the function of the layers, and only then comparing lambda, thickness and the cost of the finished installation. List the walls, plinth, floor, roof and any terrace. For each location, note contact with water, the expected load and the available space. Add the requirements for fire and the method of fixing. Such a schedule shows why one material does not have to be the best choice in every zone.

By |2026-11-14T12:52:21+01:002026-07-08|Knowledge base|Comments Off on EPS, XPS or PIR: how to choose insulation for different parts of a new home?
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