Roof Bedding & Pointing
The mortar holding your ridge caps is usually the first thing to fail on a Perth tiled roof — and once it cracks, the caps loosen and the leaks begin. We strip the failed bedding, re-secure every cap on fresh mortar and finish with flexible pointing that moves with the roof instead of cracking like the old rigid cement. The cheapest way to add years to a tiled roof.
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Bedding is the mortar bed the ridge caps sit on. Pointing is the flexible compound sealing the joint. On most Perth tile roofs the original rigid cement has cracked and let go after two to three decades. Powerdrive re-beds where needed and re-points in a flexible compound, backed by a 10-year workmanship warranty.
Roof Bedding & Pointing across Perth
Ridge caps sit on a bed of mortar and the joint is sealed with pointing. Done in rigid sand-and-cement, as it was for decades, that mortar shrinks and cracks after roughly two to three decades.
What the work involves
- Assess bedding separately from pointing. The two are different failures. Pointing alone can be renewed if the mortar bed underneath is still solid. If the bed has broken up or the caps have moved, pointing over it just hides the problem for a season.
- Re-bed and point in a flexible compound. Caps reset true to the line, then pointed in a compound that moves with the roof instead of cracking under it.
Signs you need this work
- Mortar crumbs appearing in the gutters
- A cap that sits proud, rocks or has shifted
- Ceiling stains only after wind-driven rain
Match the symptom to the fix
| What you are seeing | What it usually means | What it needs |
|---|---|---|
| Mortar crumbs in the gutter | Bedding has begun to break down | Re-bed and flexible re-point |
| Hairline crack along the ridge | Rigid pointing has shrunk | Cut out and re-point |
| Cap rocks or sits proud | Bed has failed underneath the cap | Lift, re-bed, re-point |
| Leak only in driving rain | Water entering at the ridge joint | Ridge investigation and repair |
| Moss growing in the ridge line | Joint holding moisture | Clean, re-point, treat roof |
| Previous pointing already cracked | Rigid cement used on the re-point | Re-do in flexible compound |
Guide only. Every roof is different, which is why we look before quoting.
How roof bedding & pointing differs across Perth
What perishes the mortar under your ridge caps — salt, damp, movement, heat or age — and how it’s re-bedded and re-pointed changes with where the home sits. Here is how bedding and pointing plays out across Perth.
On the coast
On the coast the ridge and hip caps take the wind first, and salt-laden gusts work the pointing loose and lift the caps along the exposed edges while the field of the roof sits sound. Along the coastal strip through Scarborough, Hillarys and Sorrento failed pointing on the caps is one of the most common coastal problems, and one of the first ways a roof starts letting wind-driven rain in.
We re-bed the caps back onto a sound mortar base where they’ve worked loose, then re-point over the top with a flexible compound rated for the exposure rather than the rigid cement that cracks and lets go. The bedding underneath is the part that actually holds the cap — pointing over a failed bed just cracks again — so on the coast we do both properly and secure the caps for the wind they’ll face, which is what stops them lifting again in the next blow off the water.
Loose caps on the coast let water straight in and become the next leak fast, on homes around Cottesloe. Our guide to why pointing fails and what to do explains why the caps go first.
In the river suburbs
In the shaded river suburbs, damp and moss work into the pointing and break it down from the surface, and the growth that thrives on the cool planes creeps up onto the ridge and into the mortar joints. Through Melville, Applecross and Bicton that damp-driven pointing failure on the ridge is a recurring find on the older tiled roofs.
We rake out the perished pointing, re-bed any caps the damp has loosened, and re-point with a flexible compound that resists the moisture better than the old rigid mortar did — and clear the growth that’s been feeding into it. On these shaded roofs the pointing and the moss go together, so re-pointing without addressing the growth just means it works back into the fresh joint, which is why we treat the cause alongside the repair rather than leaving it to come straight back.
Perished ridge pointing is a classic quiet leak source under damp conditions, on homes around Bassendean. Our guide to the most common causes of leaks covers where it fits.
Up in the hills
Up in the hills, wind and temperature swings crack rigid pointing faster, and the split-level rooflines carry more ridge and hip lines for it to fail along. The exposure works the caps and the daily hot-cold cycle fatigues the old cement mortar. Around Kalamunda, Lesmurdie and Roleystone that cracked, failing pointing across long ridge lines is the common job.
We re-bed the loosened caps and re-point with a flexible compound that copes with the movement and the temperature swings rather than the rigid cement that cracks under them. On a complex hills roof there’s simply more ridge and hip to do, so we work methodically along every line — the flexible pointing is what lasts up here, because it flexes with the daily expansion and contraction that fractures old cement, which is exactly why the original pointing failed in the first place.
More ridge line and harsher swings mean more to keep sound up here, on homes around Mundaring. Our guide to why pointing fails explains why flexible outlasts cement.
On low, damp ground
On low, damp ground the persistent moisture perishes the bedding mortar from beneath — the mortar the caps sit in never fully dries, softens over time, and lets the caps work loose even where the pointing on top still looks intact. In the lower-lying pockets around Bayswater, Bassendean and Ascot that damp-softened bedding is the underlying issue.
We lift and re-bed the caps onto fresh mortar, then re-point over the top with a flexible compound, addressing the bed as well as the surface. The bedding is the part that matters most here, because pointing over a soft, damp-perished bed just cracks again as the cap keeps moving — so we renew the mortar the cap actually sits on and finish it with flexible pointing, which is the difference between a repair that holds and one that’s loose again within a season on damp ground.
Soft bedding is the real cause here, not just the surface pointing, on homes around Maylands. Our guide to why pointing fails and what to do covers the bed beneath the caps.
On reactive clay
On reactive clay the seasonal ground movement cracks the pointing along the ridges and hips every year, and rigid cement pointing simply fractures again each time the clay swells and shrinks. Through the clay belt around Gosnells, Forrestfield and Thornlie that recurring cracked pointing that keeps coming back after every patch is the giveaway.
We re-bed where needed and re-point with a flexible compound that moves with the seasonal swell instead of fracturing, which is the whole answer on reactive ground. A rigid re-point looks fine for a season and then cracks in exactly the same spots, so the flexible compound is not a nice-to-have here but the actual fix — it flexes with the house rather than fighting it, which finally breaks the cycle of pointing that fails every winter no matter how many times it’s redone.
If your ridge keeps cracking in the same places, rigid pointing is the reason, on homes around Maddington. Our guide to why pointing fails explains why flexible is the lasting answer on clay.
On the sand plain
Across the free-draining sand plain the ground is stable, so pointing here fails from age rather than movement — the newer estates are reaching the point where the original factory pointing has begun to crack and crumble on schedule. Through Wanneroo, Baldivis and Butler that first wave of failing pointing is arriving now.
We re-bed any caps that have loosened and re-point with a flexible compound, renewing the ridge before the cracks let water in. Caught early it’s straightforward, planned work — the caps are still well bedded and just need the pointing renewed — so it’s a cheap, high-value job that keeps a sound roof watertight for years, provided it’s done before a cracked joint has let water track into the roof over a wet winter.
Renewing the pointing early is cheap insurance on this stock, on estates around Ellenbrook. Our guide to why slipped tiles shouldn’t wait covers acting before small problems grow.
On character and heritage homes
On character and heritage homes the original lime-based mortar and old terracotta caps need sympathetic handling — the wrong modern mortar can be too hard for fragile old tiles and the caps themselves are worth preserving rather than replacing. Through Fremantle, Guildford and Mount Lawley that careful approach sets heritage bedding and pointing apart.
We re-bed the original caps where we can rather than swapping them, matching the approach to the age of the roof, and re-point with a compound suited to old terracotta rather than a hard modern cement that can crack fragile tiles. The care is in preserving the original caps and not over-stiffening the ridge, because a heritage roof re-pointed like a modern one can damage the very tiles it’s meant to protect, so it’s slower, more considered work that keeps the character intact.
Preserving the original caps is the priority on old roofs, on homes around Subiaco. Our guide to what’s different about restoring a terracotta roof covers the sympathetic approach.
On post-war housing
On post-war housing, crumbled ridge pointing is one of the most common findings — the original cement mortar has simply perished after decades in the sun, leaving the caps loosely held and the joints open. Across the post-war suburbs of Morley, Dianella and Bentley that perished pointing is behind a great many leaks on this stock.
We re-bed the caps that have worked loose and re-point the whole ridge line with a flexible compound, which on a sound post-war roof is exactly the cost-effective maintenance it needs. The structure is generally fine and the ridge is the weak point, so renewing the bedding and pointing properly keeps the roof watertight for years without touching the tiles — and it’s often the single most worthwhile thing you can do for a tired-looking post-war roof short of a full restoration.
Re-pointing the ridge is the classic worthwhile post-war repair, on homes around Nollamara. Our guide to the most common causes of leaks covers why it matters.
On newer estates
On newer estates, cracked or missing pointing is usually a laying fault or storm damage rather than age — the roof’s too young for the pointing to have perished, so it’s original workmanship or a blow that’s lifted a cap, and it may sit under warranty. Through Joondalup, Aveley and Harrisdale that’s the usual cause.
We re-bed and re-point the affected caps properly with a flexible compound, and where it looks like an original laying fault on a recent home we’ll point you at the builder’s warranty first. On young stock the value is knowing whether the failed pointing is your cost or the builder’s — pointing shouldn’t be cracking yet, so if it is, that often signals a workmanship issue worth claiming rather than simply paying to redo, which is worth establishing before any work.
Knowing whether it’s warranty saves you money on newer homes, on estates around Byford. Our guide to why pointing fails covers the difference.
On strata and multi-residential
On strata and multi-residential, the long ridge lines across multiple units make bedding and pointing a substantial, ongoing maintenance item, and failed pointing over common property affects the tenancies beneath it. Around Victoria Park, Rivervale and Burswood that scale is what defines the strata brief.
We re-bed and re-point the full ridge line to a consistent standard with a flexible compound, and hand back a documented record for the owners corporation. On a large shared roof the consistency and documentation are half the value — the committee needs the whole ridge renewed to one standard and a record to minute the spend — so we do it uniformly across the building rather than in mismatched patches and give them the paperwork that lets them justify and track the work.
Consistent, documented ridge work is what strata management needs, on buildings around East Perth. Our guide to the most common causes of leaks covers the risk of leaving it.
Near heavy industry
Near heavy industry, atmospheric fallout degrades the pointing faster and leaves the mortar brittle sooner than in a suburban setting — the exposure attacks the joints as surely as it dulls the tiles. Around Kwinana, Welshpool and Bibra Lake that accelerated pointing failure is the pattern.
We re-bed the loosened caps and re-point with a flexible compound that stands up to the exposure better than the original mortar, and check the wider ridge because the deterioration rarely stays in one spot. In an industrial area the pointing degrades across the whole roof rather than at one point, so we assess the full ridge and hip lines rather than just the obvious failure, which stops a string of repeat visits as the next joint lets go a few months later.
Assessing the whole ridge matters where the exposure is even, on sites around Naval Base. Our guide to why pointing fails covers the causes.
In bushfire areas
In bushfire areas, well-sealed ridge and hip lines matter for embers as well as weather — gaps where pointing has failed are openings embers can exploit, so sound bedding and pointing does double duty on an exposed block. Through the bushfire hills of Kalamunda, Mundaring and Roleystone that gives the work extra weight.
We re-bed and re-point the ridge and hip lines with a flexible compound, closing the gaps properly so the roof is both watertight and better sealed against embers. Up here the sealing serves two purposes — keeping wind-driven rain out and denying embers a way in through a failed joint — so a thorough re-point contributes to a more resilient roof, not just a tidier one, which is worth doing properly before summer on a block that faces genuine fire exposure.
Sealed ridge lines are part of a fire-ready roof up here, on homes around Bedfordale. Our guide to why pointing fails and what to do covers keeping it sound.
Under mature trees
Under mature trees, constant damp and moss creep into the ridge pointing and break it down, and the shade keeps the mortar joints wet enough for growth to take hold in them. Through the leafy streets of Nedlands, Applecross and Mount Lawley that moss-invaded, damp-perished pointing is the recurring find.
We rake out the failed pointing, re-bed any caps the damp has loosened, re-point with a flexible compound, and clear the growth that’s been working into the joints. Under heavy canopy the moss and the pointing failure feed each other, so re-pointing without dealing with the growth just lets it creep straight back into the fresh joint — which is why we treat the cause alongside the repair and are upfront about keeping the ridge clear afterwards.
The moss and the pointing failure go together under trees, on homes around Dalkeith. Our guide to the most common causes of leaks covers where it fits.
On exposed, elevated blocks
On exposed, elevated blocks the wind works the ridge and hip caps harder than anywhere, lifting them and cracking the pointing where the roof has the least shelter. Around the high, open blocks near Kalamunda, Gooseberry Hill and higher Hillarys that wind-worked ridge is the defining problem.
We re-bed the caps onto a sound mortar base and re-point with a flexible compound, securing the ridge for the exposure rather than a sheltered standard. On a high block the bedding and the fixing are what keep the caps on — pointing alone won’t hold a cap the wind is working — so we re-bed properly and finish with flexible pointing rated for the exposure, which is the difference between a ridge that holds through a gale and one that’s lifting again by the next front.
Securing the caps for the exposure is the real job up here, on homes around Darlington. Our guide to why pointing fails explains why the caps need the attention.
On made ground
On made ground, uneven settlement cracks the pointing along the ridge much as reactive clay does — the slow, uneven movement of a filled site fractures rigid mortar at the joints, and it keeps returning until it’s done in a way that allows for the movement. On the made-ground pockets around Rockingham, Baldivis and Wellard that settlement-driven cracking is common.
We re-bed where needed and re-point with a flexible compound that moves with the ongoing settlement rather than a rigid one that simply cracks again. On settling ground the flexible pointing is the actual fix, because the fill beneath the house keeps moving for years — a rigid re-point just resets the clock — so we build the flex in and detail the ridge to keep sealing as the structure continues to shift, which is what finally stops the annual re-crack.
The flexible compound is what lasts on settling ground, on homes around Byford. Our guide to why pointing fails and what to do explains why rigid mortar keeps failing.
Common questions
What is the difference between bedding and pointing?
Bedding is the mortar bed the ridge cap sits on, structural. Pointing is the sealing compound over the joint between the cap and the bed, weatherproofing. They fail differently and they are priced differently, so a quote should tell you which one you are getting.
Can you just re-point without re-bedding?
Sometimes and it is the cheaper job when it is honest. If the mortar bed is sound and only the pointing has perished, re-pointing alone is the right call. If the bed has broken up, pointing over it buys a season and wastes your money.
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