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Which trapezoidal steel profile suits a canopy roof?

For a carport, trapezoidal steel sheet T18 or T35 can be considered, but the choice requires checking the support spacing and loads. A higher profile does not mean an arbitrarily larger span. The steel thickness, geometry, building location and method of fixing all matter. In an open carport, wind acting from underneath must also be taken into account. Limiting condensation under the covering is a separate decision. A carport roof is exposed from various sides. Wind can act on both the upper and lower surfaces of the covering. Fixings from a closed garage should therefore not be copied without checking the conditions. Location, height, surroundings and degree of wall openness are important. These data influence the selection of the sheet, fasteners and the entire structure.

By |2026-11-14T15:41:30+01:002025-10-02|Technology and applications|Comments Off on Which trapezoidal steel profile suits a canopy roof?
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How to choose a repair for a leaking metal roof

Repairing a leak in metal roofing starts with establishing whether the water comes from rain or from condensation. Note when the dampness appears – a leak after rain driven by a strong wind may have a different cause from droplets seen in the morning in a cool garage. Check the fixings, sheet laps and flashings, as well as any services in the loft. Only after identifying the problem should you choose a sealant, replace an element or improve a detail, remembering that repair compound is not universal.

By |2026-11-14T18:55:27+01:002025-10-01|Technology and applications|Comments Off on How to choose a repair for a leaking metal roof
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Where does damp on a north-facing wall come from and where should you start with the repair?

A north-facing wall tends to be cooler and dries more slowly after rain. Orientation alone does not explain every patch, however. The cause may be a leak, moisture from the ground or condensation of vapour from inside the room. Before you cover the wall with insulation, establish where the water is coming from. This determines whether a repair makes sense and in what order it should be done. Mark the boundaries of the damp and note when you notice them. A patch under a window sill after heavy rain points to different places than a damp corner during frost. The link with the weather is a clue, not a final diagnosis. Water can move within the layers and show up far from where it enters.

By |2026-11-14T09:33:17+01:002025-09-07|Technology and applications|Comments Off on Where does damp on a north-facing wall come from and where should you start with the repair?
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Choosing a roof covering for a holiday cottage

First decide whether the holiday cottage will be used only seasonally or heated in winter as well, as this changes the roof requirements. Check the minimum pitch for the chosen profile, the support spacing and the loads, not just the appearance of the covering. For year-round use, condensation, ventilation and the continuity of the sealing layer must be assessed; in summer, protection against rain and overheating is key. A sandwich panel can combine covering and insulation, but it needs correct locks and support. Leave the design of the layer build-up to the designer.

By |2026-11-14T18:55:52+01:002025-09-05|Technology and applications|Comments Off on Choosing a roof covering for a holiday cottage
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Structural trapezoidal steel decking: uses and price factors

Structural trapezoidal steel sheet can form the load-bearing substrate of a roof or work in another arrangement specified by the design. Deep ribs allow steel to be used efficiently, but the profile height alone does not determine the permissible span. The choice is governed by thickness, steel grade, supports and loads. The price must be compared for the same structural task, taking into account fixings and the other roof layers. A low profile used as an external covering sheet and a high load-bearing profile may look similar in a small sample. Their tasks, however, are different. Structural sheet is part of the load-transferring system. It can support the roof insulation and waterproofing. In such an application, tightness is provided by a separate layer designed above it.

By |2026-11-14T15:41:11+01:002025-09-02|Technology and applications|Comments Off on Structural trapezoidal steel decking: uses and price factors
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Inspecting a delivery of sheet metal flashings before installation

It is best to check the flashings while they can still be compared with the documents and set aside freely. Bringing the entire delivery onto the roof before checking makes it harder to clarify mistakes. The acceptance check does not have to be complicated. It should, however, cover quantity, geometry, material and surface condition. This allows a recognisable complete set to be handed over to the installer instead of a collection of similar metal strips. The acceptance check requires the schedule according to which the delivery was made. If the order was changed, the latest approved version must be used. It is not worth comparing the sheets with the first working quote. Differences may then result from an agreed correction rather than from a supplier error.

By |2026-11-15T02:37:05+01:002025-08-27|Technology and applications|Comments Off on Inspecting a delivery of sheet metal flashings before installation
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How should you plan chimney flashing on a trapezoidal steel sheet roof?

Chimney flashing must join two different surfaces: a vertical wall and a profiled roof covering. The most difficult point is usually behind the chimney, on the ridge side. This is where water arrives from the higher part of the roof. A good detail starts with measurement and unobstructed drainage. A sealant layer alone will not replace correct laps. You need the dimensions of the chimney at the roof covering, its position and the roof pitch. Measure the width on the eaves side and the length of the sides. Check whether the chimney walls are perpendicular to the roof covering and whether the render forms an even surface. Do not order components solely according to the chimney dimension given on the building plan.

By |2026-11-14T09:23:47+01:002025-08-05|Technology and applications|Comments Off on How should you plan chimney flashing on a trapezoidal steel sheet roof?
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What are the advantages and limitations of a mansard roof?

A mansard roof is distinguished by its broken slopes, divided into a steeper lower part and a gentler upper part. This can give the attic more usable space than a simple roof of similar height, but construction demands more careful junctions. It is worth checking whether the design shows sections with heights and realistic furniture, not just a floor plan. For metal roofing, plan sheet formats, the treatment of the break and ventilation separately, because these details determine durability.

By |2026-11-14T22:27:47+01:002025-08-05|Technology and applications|Comments Off on What are the advantages and limitations of a mansard roof?
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How do you calculate the full cost of covering a 200 m² roof with trapezoidal steel sheet?

For a 200 m² roof, multiplying the area by the price of the steel sheet is not enough. First you need to know whether this refers to the slope area or the building footprint. Then come laps, cut-offs and full sheets. Flashings, fixings and labour are calculated separately. A clear breakdown shows where the cost actually arises. Let us assume this is the measured area of both slopes, taking their pitch into account. If the 200 m² refers to the footprint, a geometric conversion will be needed. Eaves also increase the covered area. You should not take the external wall dimensions as the finished roof area.

By |2026-11-14T12:00:31+01:002025-08-04|Technology and applications|Comments Off on How do you calculate the full cost of covering a 200 m² roof with trapezoidal steel sheet?
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Can trapezoidal steel roofing suit a traditional house?

Trapezoidal metal sheeting can suit a traditional house if its profile, colour and details match the building's proportions. Before ordering the material, check local rules on roof appearance, as these may determine the permitted options. Assess the whole covering together with the eaves, gutters and façade, not just the sheet itself. The choice of profile, such as T18 or T35, must first meet technical requirements; only among those options should appearance be decided. Consistency of details is key.

By |2026-11-14T18:53:51+01:002025-07-24|Technology and applications|Comments Off on Can trapezoidal steel roofing suit a traditional house?
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