Render and texture coat failure: diagnosing cracking, delamination and efflorescence
Render failures rarely begin in the render. Read the crack pattern, the drummy map and the salt bloom together and they point to the substrate, the mix or the water that is still getting in.
13 min read
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Building Materials
What the materials in a house are doing: new products, how established ones perform, supply and prices, and the details that decide whether they last.
Render and texture coat failure: diagnosing cracking, delamination and efflorescence
Render failures rarely begin in the render. Read the crack pattern, the drummy map and the salt bloom together and they point to the substrate, the mix or the water that is still getting in.
13 min read
Wall cladding fixings, clearances and ground levels
Cladding rarely fails because the sheet was the wrong product. It fails because the fixing, the clearance or the ground level under it was set by habit rather than by the manufacturer’s instructions and the NCC.
12 min read
Roof tile rebedding and pointing: scope, materials and common faults
Rebedding and pointing is repair work on an existing tiled roof, not a re-roof. Getting the scope, the mortar and the coating right decides whether it lasts one season or fifteen.
13 min read
Metal roof flashing details that cause leaks
Most metal roof leaks are not product failures. They are sequencing and lap-direction failures that are sealed over before anyone can see them.
13 min read
Roof sarking and underlay: getting laps, drapes and penetrations right
Sarking is the layer that catches what the roof covering lets through, and it only works if it is lapped, draped and sealed in the right direction. Most failures are not product failures — they are installation failures at laps, valleys and penetrations.
11 min read
Roof truss bracing and tie-down checks before sheeting
Bracing and tie-down are routinely signed off without being checked, because the work is done by someone else and the paperwork arrives before the roof does. Here is how to inspect it before sheeting closes the frame in.
11 min read
Engineered floor joists: installation errors that show up later
Most engineered joist failures are not manufacturing faults. They are penetrations cut in the wrong place, bearings detailed for solid timber, and moisture allowed into a member that cannot dry.
11 min read
Steel framing fixing details: how cold-formed frames are actually fastened
Cold-formed steel frames fail at the connections, not the members. This covers screw and fixing selection, how load reaches the fixing, galvanic risk between dissimilar metals, and what to inspect before the frame is closed up.
12 min read
Nail plates, cyclone washers and fixing schedules for timber frames
The fixing schedule tells you what holds the frame together. If you only read it after the plasterboard goes on, you are relying on someone else’s work with no way to check it.
15 min read
Formwork stripping times for residential slabs, beams and walls
Stripping formwork is a decision about load, not a decision about the clock. The rules differ for slab soffits, beam sides and soffits, and wall panels, and cold weather shifts all of them.
12 min read
Curing concrete in hot weather: what actually prevents cracking
Hot weather does not crack concrete by itself. It drives moisture out of the surface faster than the mix can replace it, and the surface shrinks against a cooler core. The decision that matters is when to start curing, and that is a measurement, not a guess.
11 min read
Reinforcement cover and concrete durability in coastal and exposed sites
Cover is not a dimensional detail you check once at pre-pour. On coastal and exposed sites it is the single largest determinant of how long the reinforcement inside a slab, footing or column stays passive.
13 min read