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So far PiVi has created 1404 blog entries.

Choosing timber connectors for a roof frame

A timber connector is selected for the specific joint, not merely for the beam width. To choose the right connector, you need to check the force directions, the substrate, corrosion protection and the required nails or screws. Even a correctly selected plate will not perform as intended if it is fastened randomly. It is therefore worth starting with the joint drawing and information on the forces transmitted, then analysing the technical documentation. This will help prepare an order for timber roof truss connectors that comply with the design and installation conditions.

By |2026-11-15T00:56:47+01:002025-10-22|Blog|Comments Off on Choosing timber connectors for a roof frame
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Reasons to use metal cladding on a building façade

Metal cladding works well when you want clear geometry and a regular division of the surface. It is worth assessing the proportions of the profile, the layout of the sheets and the care taken with details, as well as the substructure and protection of the wall against water and moisture. Choosing between T18 and T35 is not just a matter of colour – the effect is shaped by the rhythm of light and shadow, which depends on the width of the flat fields. Before deciding, view a larger sample in the planned orientation, because a small catalogue cut-out does not fully convey the character of the façade.

By |2026-11-14T21:02:21+01:002025-10-22|Blog|Comments Off on Reasons to use metal cladding on a building façade
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When should you choose wall panels with 150 or 200 mm mineral wool?

Thicker panels with mineral wool are worth considering for a demanding thermal balance or a specific wall solution. This does not automatically mean the highest fire class. The 150 and 200 mm variants also differ in weight and details. They should be selected before making the connections, flashings and fixings for the entire enclosure. In one example panel family, Uc is approximately 0.27 W/(m²K) for 150 mm and 0.20 W/(m²K) for 200 mm. A lower value means reduced heat flow through the component in question. However, the data should be related to the specific product, not to all panels of that thickness.

By |2026-11-14T11:11:45+01:002025-10-14|Blog|Comments Off on When should you choose wall panels with 150 or 200 mm mineral wool?
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Measuring the eaves and gutter position for a custom gutter apron

The gutter apron should follow from the geometry of the eaves. Fitting it to the width of the fascia board alone is not enough. The flashing connects the roofing zone with the water collection in the gutter. Its position therefore depends on the roof pitch, the method of fixing the gutter and the layer build-up. Before ordering, it is worth drawing a cross-section. This makes it easier to check whether a ready-made profile will do the job or whether a different shape is needed. On the sketch, mark the roofing surface, the substrate of the flashing and the gutter position. Add the run of the underlay, if present on the given roof. It is precisely in this cross-section that the water paths can be established. A plan view of the eaves from above does not show all the relationships needed for bending the apron.

By |2026-11-15T04:43:39+01:002025-10-10|Blog|Comments Off on Measuring the eaves and gutter position for a custom gutter apron
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Understanding the weight of T18 and T35 trapezoidal roofing sheets

The weight of T18 and T35 trapezoidal sheets follows from the steel thickness, the profile shape and the area the mass is referred to. The coverage area is not the same as the area of the whole sheet. Because T18 and T35 can vary in width, compare their mass in the same unit. With a similar profile, a thicker steel core makes the sheet heavier. Do not rely on the numbers in the profile name alone, as different ribs consume a different strip width per metre of coverage. Catalogue data support transport planning but do not replace roof load-bearing calculations or arrangements for unloading.

By |2026-11-14T21:02:08+01:002025-10-08|Blog|Comments Off on Understanding the weight of T18 and T35 trapezoidal roofing sheets
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Ordering roof and wall panels together for a building extension

The roof and walls can be ordered in one stage, but they must be described separately. The panels differ in profile, joints and requirements. A combined schedule helps to coordinate colours, flashings and transport. Find out how to prepare such a purchase so that the next delivery fits the structure and the extension schedule. In the schedule, separate the roof, external walls and any internal partitions. Each group may have different thermal conditions, loads and fire requirements. Do not assume one thickness for all elements just to simplify the order.

By |2026-11-14T17:30:06+01:002025-10-04|Blog|Comments Off on Ordering roof and wall panels together for a building extension
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Daylight in the loft: gable windows, roof windows or dormers?

The choice between a gable window, a roof window and a dormer depends on where light is actually needed in the attic. First draw the room functions and furniture layout, because a desk needs different light from stairs or the area by the bed. Check the cardinal directions and the surroundings of the house, which may restrict daylight. Also consider the sloped ceilings and the height of the knee wall to assess the view from a seated position. Compare the full scopes of work: structure, flashings, insulation and finishing.

By |2026-11-15T00:58:32+01:002025-10-01|Blog|Comments Off on Daylight in the loft: gable windows, roof windows or dormers?
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Deciding which covering to use on a house roof

In Poland, the choice of roof covering depends primarily on the roof shape, pitch and the building's use, not on appearance alone. Before comparing cut and modular metal roof tiles, trapezoidal sheet and sandwich panels, check the design and any elevation requirements. Roof pitch, structural load capacity and permitted colour may narrow the options. Always verify the minimum pitch for the specific product and joining method, as no single value applies to every profile.

By |2026-11-14T17:30:22+01:002025-09-22|Blog|Comments Off on Deciding which covering to use on a house roof
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Metal roofing and energy use: how the whole roof build-up matters

How much energy a building uses is decided not by the metal roof covering alone but by the whole thermal envelope. The sheet protects the roof from external conditions and drains water, yet it conducts heat well. Readers should check which layers lie beneath the covering or within a sandwich panel, how continuous the insulation is and where thermal bridges occur. It is also worth comparing the declared lambda, thickness and R-value of specific materials and examining junctions with windows and ventilation. The designer should decide on solutions based on calculations for the entire assembly.

By |2026-11-15T00:56:15+01:002025-09-13|Blog|Comments Off on Metal roofing and energy use: how the whole roof build-up matters
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How do you fix sandwich panels to an existing masonry wall?

A masonry wall is not always a ready substrate for new panel cladding. First the masonry must be assessed and the way loads are transferred determined. Only then are profiles, anchors and fasteners selected. During refurbishment, unevenness, the condition of lintels and space for sealing the entire building envelope also matter. Begin by establishing what the wall is built from. Solid brick, block and concrete require different fixing solutions. Plaster alone says little about the load-bearing capacity of the substrate. Exposing a few locations may reveal hollow joints, friable areas or earlier repairs. The parameters of a new material must not be assumed for an old wall without assessing its condition.

By |2026-11-14T14:20:43+01:002025-09-09|Blog|Comments Off on How do you fix sandwich panels to an existing masonry wall?
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