Exterior Wall Cladding Materials Compared for Real Projects

Five checks before comparing materials

This is a comparison method based on public guidance and manufacturer documents, not our tests or a ranking. No generic weight, price or service-life range is assigned to a family.

Check	Project evidence
System	Bonded / mechanically fixed / cavity; complete build-up
Load	Product mass and thickness; verified support and anchorage
Fire	Applicable project requirement; matching product and assembly evidence
Exposure	Rain, sun, salt, frost; compatibility of finish and fasteners
Maintenance	Inspection, cleaning, coating, access and removal sequence

Settle the system first — see ventilated facade vs direct-applied cladding. Metal sheet and composite panels differ in construction; record thickness and mass for the exact candidate.

The candidates: checks by material

Each short entry uses the same comparison fields: load and exposure evidence, maintenance, replacement and the main assembly constraint. Fill the record below for actual candidates.

Brick and brick slips

Verify unit and system mass, support, exposure suitability and joint maintenance. Bonded slips and supported masonry need different repair procedures; confirm removal and matching spare stock.

Natural stone

Check stone identity, support or bond system, moisture and frost exposure, cleaning and repair. Weight and replacement access need project evidence; stone is not an automatic durability winner.

Fibre cement

Check product mass, coating, exposure and edge treatment. EQUITONE’s public US application guide requires Luko on site-cut [natura] and [natura] PRO edges: that is a named-product instruction, not proof that every fibre-cement product needs the same treatment. Verify the removal sequence.

Metal sheet, cassette and composite

Confirm thickness, core, coating and fire evidence together. Check corrosion exposure and metal compatibility. Interlocking cassettes may need adjacent panels removed; “panelised” does not prove independent replacement.

Timber

Record species or product, finish, moisture detailing, inspection and any recoating schedule. Check fixings and whether a damaged board can be removed without dismantling adjoining boards.

Render and EIFS

Check the specified substrate, reinforcement, movement and water-control details. Record coating maintenance and the repair method; inspect a repair sample where visual continuity matters.

Porcelain and ceramic panels

Check unit mass, product exposure evidence, anchors, support and handling instructions. Confirm how one panel is released and replaced within that fixing system.

High-pressure laminate

Check product fire evidence, exposure and movement instructions, finish care and replacement access. A family name does not establish the performance of the complete assembly.

How to narrow the list

1. Apply the hard constraints. Fire classification for your building height and occupancy. Structural capacity for the weight. Any planning or conservation requirement on appearance. These are project constraints, not a predetermined fraction of the list.

2. Apply exposure. Driving rain, UV intensity, freeze-thaw cycling, coastal salt. Then check that the fasteners’ material, grade, coating and compatibility suit the system and exposure.

3. Apply maintenance reality. Not what is theoretically possible, but who will actually do it and how they will reach it. Timber on a two-storey house with easy scaffold access is a different proposition from timber on a fifth floor over a public footpath.

4. Apply repairability. Ask what happens when one area is damaged. Confirm whether fixings are accessible and what adjacent units must be removed. Check the appearance of a repaired continuous finish as well.

5. Then choose on appearance from whatever survived, including how the material weathers rather than only how it looks new.

Where each one is the wrong choice

• Brick and stone on a structure that was not designed for the weight, or in renovation without a verified capacity check.
• Timber where nobody has committed to a recoating cycle, or on elevations with high UV and no shading.
• Render over a substrate that moves, or where impact damage at ground level is likely.
• Metal where visible surface damage is unacceptable and the location invites it.
• Fibre cement where the proposed edge treatment conflicts with that product’s installation instructions.
• Any panel system where the support system was value-engineered out after the material was chosen.

Candidate document record

Copy one record per option; comparison fields need the same units and exposure assumptions.

Field	Candidate record
Product / thickness / mass per area	______
Manual / technical sheet revision	______
Exposure / corrosion compatibility	______
Fire requirement / matching evidence	______
Maintenance / access / removal steps	______
Missing evidence / responsible reviewer	______

The decision that gets skipped

Almost every cladding conversation starts with appearance and works backwards. That is why cladding decisions get reopened late, after the structural or fire constraint surfaces.

Running the constraints first is faster, even though it feels like the boring order. It also produces a shortlist you can defend when someone asks why the cheaper option was not used — which is a question that always arrives eventually.

Settle the system before the material — see the facades and exterior design guide and types of facade systems. Where weight governs, start instead with lightweight facade materials.