Written by Five Star Roofing | Published on June 2025
Roof rebedding replaces the sand and cement mortar base that holds your ridge and hip capping tiles in place, while repointing applies a fresh flexible pointing compound over the top of that base. These are two separate but related processes, and most tiled roofs in NSW, QLD and ACT need both done at the same time when the mortar has failed. This article breaks down exactly what each job involves, when it is needed, what it costs, and how to choose the right contractor.
Understand What Rebedding and Repointing Actually Are
Ridge and hip capping tiles sit along the peaks and edges of a tiled roof. They are not nailed down like field tiles. Instead, they sit on a bed of sand and cement mortar that bonds them to the roof structure below.
Over time, that mortar bed cracks, crumbles and loses its bond. When it fails, the capping tiles become loose or lift entirely. That is when rebedding is required.
Rebedding means removing the old mortar completely, cleaning the surface, and laying a fresh sand and cement bed before resetting the capping tiles on top.
Repointing is a separate step that applies a flexible acrylic or polymer pointing compound over the top of the mortar bed once it has cured. This sealing layer prevents water from entering the join and allows for minor movement without cracking.
Repointing without rebedding is like painting over a crumbling wall. If the mortar bed underneath is already failing, a fresh pointing coat will not save it. Both jobs are usually required together on roofs older than 15 to 20 years.
Spot the Warning Signs That Your Roof Needs Rebedding
The sooner you catch mortar failure, the cheaper the repair. Leaving it too long means loose capping tiles, water ingress and potential structural damage to your sarking, battens or ceiling.
- Cracked, crumbling or hollow-sounding mortar along the ridge line
- Ridge or hip capping tiles that rock, shift or have already come loose
- Visible gaps between the pointing compound and the tiles
- Pointing that has turned grey, powdery or is peeling away in chunks
- Water stains on your ceiling near the ridge area after heavy rain
- Moss or lichen growing heavily along the ridge, which traps moisture and accelerates decay
- Tiles that have slipped down the slope of the roof near hip ends
In coastal areas of NSW like the Central Coast, Newcastle and the Northern Beaches, salt air accelerates mortar breakdown significantly. Homes in these areas may need attention every 10 to 15 years rather than the standard 20-year cycle.
In QLD, the combination of intense UV, high humidity and storm season puts extreme stress on pointing compounds. ACT homes face freeze-thaw cycles in winter that cause mortar to crack and expand repeatedly over the colder months.
Compare Rebedding and Repointing Side by Side
Many homeowners confuse these two terms or assume they are the same job. The table below shows the key differences between the two processes.
| Feature | Rebedding | Repointing |
|---|---|---|
| What is replaced | The full sand and cement mortar base | Only the flexible pointing compound on top |
| When it is needed | Mortar base has cracked, crumbled or lost bond | Surface pointing has cracked but base is still sound |
| Capping tiles removed | Yes, tiles are lifted and cleaned | No, tiles stay in place |
| Materials used | Sand, cement, water | Flexible acrylic or polymer compound |
| Typical lifespan after work | 15 to 20 years | 8 to 12 years |
| Average cost (per lineal metre) | $40 to $70 | $15 to $30 |
| Can be done independently | Only if mortar base is still sound (rarely) | Yes, on a well-bedded roof |
At Five Star Roofing, we inspect both the base and the surface pointing before recommending which work is actually needed. You should never be sold a full rebedding job if repointing alone will do the job.
Understand the Rebedding Process Step by Step
Knowing what the job involves helps you evaluate quotes properly and know what to expect on the day. A professional rebedding job follows these steps.
- Safety setup: The crew sets up edge protection and scaffolding or harnesses as required under Australian roofing safety standards (AS/NZS 4994 and the relevant state Work Health and Safety regulations).
- Remove capping tiles: Ridge and hip tiles are carefully lifted and set aside. Broken tiles are identified and flagged for replacement.
- Remove old mortar: All old mortar bed is chipped away and removed. The roof surface is cleaned back to the tile surface below.
- Check for damage: The contractor inspects the underlying tiles, sarking, battens and any flashings while everything is exposed.
- Lay fresh mortar bed: A new sand and cement mix is applied to the correct profile and depth, typically 25 to 40mm.
- Reset capping tiles: Tiles are pressed firmly into the fresh bed and aligned correctly across the ridge line.
- Cure time: The mortar is left to cure for 24 to 48 hours before pointing is applied.
- Apply flexible pointing: Once cured, the pointing compound is applied over the joins to seal and protect the bed from water and UV.
The whole process on an average suburban home typically takes one to two days depending on the length of ridge and hip runs.
Review Typical Costs Across NSW, QLD and ACT
Pricing varies based on roof size, pitch, access difficulty, tile type and the extent of damage. The figures below are realistic ranges based on current market rates.
| Job Type | Sydney and NSW | Brisbane and QLD | Canberra and ACT |
|---|---|---|---|
| Repointing only (average home) | $900 to $1,800 | $800 to $1,600 | $950 to $1,900 |
| Rebedding and repointing (average home) | $2,500 to $5,000 | $2,200 to $4,500 | $2,600 to $5,200 |
| Per lineal metre for rebedding | $45 to $70 | $40 to $65 | $48 to $72 |
| Per lineal metre for repointing | $18 to $30 | $15 to $28 | $20 to $32 |
| Individual broken capping tile replacement | $35 to $80 per tile | $30 to $75 per tile | $38 to $85 per tile |
ACT pricing is slightly higher due to the additional preparation required for freeze-thaw conditions. Steep pitch roofs (above 35 degrees) will also attract a premium in all states due to increased labour time and safety requirements.
Be cautious of quotes that seem unusually low. Cheap rebedding jobs often skip proper mortar removal, use incorrect mix ratios, or apply rigid cement-based pointing instead of the flexible compound required to handle roof movement.
Know What Materials Are Used and Why They Matter
The quality of materials used in rebedding and repointing directly affects how long the repair lasts. This is an area where shortcuts are easy to hide but expensive to fix later.
For the mortar bed: A standard 3:1 or 4:1 sand to cement ratio is used, sometimes with a bonding agent added for improved adhesion. The mix must not be too wet or too dry. A poorly mixed bed will crack within a few years.
For pointing: Rigid cement pointing is no longer considered best practice in Australia. The industry standard is now a flexible acrylic or polymer-modified compound. Products like Bostik Seal N Flex, Dulux AcraTex Ridge Seal and similar flexible compounds are designed to move with the roof without cracking.
Rigid pointing on a roof that naturally expands and contracts with heat will crack every summer. This is a common failure mode in QLD where roof surface temperatures can reach 70 degrees Celsius or higher on a clear day.
When Five Star Roofing completes a rebedding and repointing job, we use flexible pointing compounds rated for exterior UV and thermal movement. We do not use rigid cement for pointing because it fails prematurely in Australian conditions.
FAQs on Roof Rebedding and Repointing
Can I just repoint my roof without rebedding it?
Yes, if the mortar bed underneath is still structurally sound and well bonded. A qualified roofer can assess this by checking for hollow sections and movement in the capping tiles. If the base is solid, repointing alone is a valid and cost-effective repair.
How long does roof rebedding last in Australian conditions?
A properly done rebedding job using the correct mortar mix and flexible pointing should last 15 to 20 years in most parts of NSW, QLD and ACT. Coastal and high-UV environments may reduce that to 12 to 15 years. Regular roof inspections every five years help you catch any deterioration before it becomes a major repair.
Is roof rebedding covered by home insurance?
Generally no. Rebedding is classified as maintenance and wear and tear, which most home insurance policies exclude. However, if a storm dislodges capping tiles and causes consequential water damage to your ceiling or interior, that damage may be claimable. Always check your specific policy and document any storm events.
How do I know if a contractor is quoting rebedding or just repointing?
Ask them directly whether the capping tiles will be lifted and the old mortar removed. A rebedding quote should always include tile removal, full mortar removal, a fresh bed and flexible pointing. If a contractor is quoting to just apply new pointing over the old crumbling mortar, that is not a rebedding job.
What type of tiles need rebedding?
Rebedding applies to any roof with mortar-set ridge and hip capping. This includes concrete tiles (like Monier and Bristile), terracotta tiles and some older slate and fibrous cement ridge designs. Metal roofs with mechanical fasteners do not require rebedding. If you are unsure what type of roof you have, a visual inspection from a licensed roofer will clarify this quickly.
Can I do roof rebedding myself as a DIY project?
It is not recommended. Working at height on a pitched roof carries serious injury risk and requires appropriate fall protection under Australian WHS legislation. Beyond safety, incorrect mortar ratios and poor tile alignment can lead to early failure and water damage. The cost of professional rebedding is relatively modest compared to the risk involved in DIY roof work.
Wrap Up and Next Steps
Rebedding replaces the mortar foundation that holds your ridge capping in place. Repointing seals the surface above it. Both are essential maintenance tasks for tiled roofs, and skipping either one can lead to loose tiles, water ingress and costly internal damage.
If your roof is 15 years or older and has not been inspected recently, it is worth having a qualified roofer take a look before the next storm season hits in NSW, QLD or ACT.
Five Star Roofing provides honest, no-pressure roof inspections and written quotes for rebedding and repointing across Sydney, regional NSW, QLD and the ACT. Call us today on +64211234567 to book your inspection or request a free quote.
