The roof of a passive house: bringing insulation, airtightness and ventilation together

A passive house roof requires combining insulation, airtightness and ventilation, not just choosing thick PIR. The building owner should check where the heated part of the house ends and how junctions at the wall plate, ridge and windows are designed. Airtightness is confirmed by a pressure test, and heat-recovery ventilation must work with the envelope. It is also worth assessing summer overheating risk and planning duct penetrations before insulation is installed. The material alone does not guarantee the standard – calculations and measurements for the whole building are needed.

2026-11-14T23:28:00+01:00

When is PIR a better choice than EPS, XPS or mineral wool?

PIR wins where a high thermal resistance is needed within a limited thickness, but it is not a universal solution. Before choosing, establish the available height, the required resistance, the loads and the fire requirements, then compare specific products and complete assemblies. Check the declared lambda and the intended use of the product, not just the material name. This article explains when EPS may be more favourable in the budget, why XPS is considered where there is contact with water, and what speaks in favour of mineral wool.

2026-11-14T23:28:07+01:00

Where do insulated wall panels with a mineral wool core help separate different building functions?

In a building, rooms rarely all serve the same purpose. A workshop may operate next to a storeroom, with a changing room behind it. Insulated wall panels with a mineral wool core allow enclosures and partitions to be created to suit these functions. Their use, however, requires the whole wall to be checked, including doors, penetrations and the method of support. In a sports equipment back-of-house area, a repair section and a quiet storage space can be separated out. One zone is in constant use, the other only when equipment is issued. The wall should respond to differences in temperature, noise and safety requirements. The division shown on the plan alone does not yet determine its construction.

2026-11-14T10:15:42+01:00

Single- and double-module metal roof tiles: which differences matter?

What matters is not the number of modules itself but the covering area of a specific panel. Before comparing, check the product dimensions and the cut plan on the actual roof slope, including the ridge, eaves and obstacles. A module is a repeating section of the pattern along the slope; overall length also includes the parts needed for joining, so it is not equal to the covering length. The format affects handling, the number of joints and the fit of edge rows, but it does not by itself determine steel quality or coating durability. The choice should be driven by roof geometry and installation organisation, not by the label ‘single-’ or ‘double-module’.

2026-11-14T16:29:42+01:00

How long do trapezoidal steel sheets last and what shortens their service life?

There is no single service life for trapezoidal sheet, because correct performance over time depends above all on matching the product to its specific environment. The name trapezoidal sheet covers many products that differ in steel thickness, metallic protection and organic coating. Before purchase, check the scope of application and the warranty conditions for the given coating, not just the longest declared period. Equally important is what counts as the end of service life: a change in gloss, a scratch and perforation are different phenomena, and a roof may need a detail repaired while the main sheets remain sound.

2026-11-14T19:47:04+01:00

How to choose an insulated wall panel with a mineral wool core for a specific workshop

The best mineral wool panel is one that meets the requirements of the given room. A sewing workshop used all year round needs a different analysis from a seasonal decoration store. Before comparing offers, describe the daily work, temperature, humidity and the expected level of quiet. Only then choose the thickness, coating and method of fixing. Note how much time people spend inside and when the heating is running. Add information about water, cleaning and equipment that gives off heat. In a small workshop, the heat source and the stored material create different conditions from those in a dry clothing repair point. The term “service premises” is therefore too general.

2026-11-14T10:15:40+01:00

Verge flashings at the edge of a sandwich panel roof

Barge flashings tidy the gable line and shield the end of the covering. In a roof made of sandwich panels, however, a distinction must be made between the protective flashing and the elements supporting the panel. A thin strip of sheet metal will not solve a structural error. A good detail shows at the same time the panel edge, the position of the support, the fixing and the way the junction with the wall is closed. Only on this basis can the right barge flashing be chosen. Catalogues list gable flashings and flashings for the upper edge of a mono-pitch roof. Variants with and without a projecting eaves overhang are also found. The differences are not limited to the length of the leg. The points of contact with the panel and the wall change, as do the directions in which water is led.

2026-11-15T03:32:46+01:00

Roofing options after professional asbestos removal

Trapezoidal steel sheet, tile-effect metal roofing and insulated sandwich panels are possible replacements for asbestos roofing if the structure and roof pitch suit the chosen system. Before ordering a replacement, have a specialist assess and remove the old sheets. Do not take samples, cut the sheets or drill through them yourself. Agree with the contractors when the exposed supports can be inspected and how the building will be kept dry. An unheated shelter and a heated workshop may need different layers beneath the same metal sheet. Compare complete roof assemblies for the building’s intended use.

2026-11-14T23:25:48+01:00

Choosing external window sills to suit the façade

The choice of an external window sill is determined above all by the finished façade thickness, the way it connects to the window and the intended appearance. The building owner and the contractor should first establish how water from the lower part of the window will be drained beyond the wall face, and only then decide on material and colour. It is worth checking the overhang, the fall, the side terminations and whether the detail blocks the joinery's drainage. Choosing between slim steel sheet and another solution is a trade-off between ease of dimensional fitting, the required support and the durability of the coating.

2026-11-14T23:25:45+01:00

Metal picket fencing on a plinth: coordinating sheet steel and the base

The plinth forms the lower part of the fence and strongly influences its proportions. The same picket looks different above a low base than above a high, massive base. Metal fence pickets can be combined with various plinth solutions if the structure has been properly designed. However, appearance must be separated from the method of fixing. The mere presence of a concrete plinth does not mean that the infill can be attached to it arbitrarily or that the steel sheet can be supported on it. When choosing the picket length, take into account the plinth height and the clearance above its top surface. The picket length is not the same as the total fence height. Overlooking this distinction can result in a bay higher than intended. On the sketch, also show the target ground level on both sides. The ground in the garden is not always at the level of the pavement.

2026-11-15T18:26:46+01:00