Roof Repointing

Roof repointing is one of the most important and most frequently overlooked maintenance tasks for a tile roof. The pointing — the mortar or compound that seals and finishes the ridge caps and hip caps on your roof — plays a critical role in preventing water ingress and keeping the caps securely in place. When it fails, the consequences range from leaks and water damage to ridge tiles literally becoming dislodged by wind and rain. At Roof Restoration Coffs Harbour, Nathan Locke has been repointing tile roofs across the Coffs Harbour region for 25 years. It’s one of the most common jobs we do, and one of the most impactful in terms of protecting a home from water damage.

What Is Roof Repointing?

To understand repointing, it helps to understand how ridge caps and hip caps work. These are the tiles — usually semi-circular or angled — that run along the ridge line at the apex of the roof and along the hip rafter lines on hipped roofs. They cover the gap where the two slopes of the roof meet and are essential for waterproofing those junctions.

Ridge caps can’t simply be laid dry. They need to be bedded in mortar on top of the field tiles and finished with a pointing compound that seals the edges and fills any gaps. This bedding and pointing system is what holds the ridge caps in place and prevents water from getting underneath them.

Repointing refers specifically to the process of removing the old, failed pointing and applying fresh pointing compound. In many cases, repointing is done in conjunction with re-bedding — replacing the mortar bed that the ridge caps sit on — when the bedding itself has also deteriorated. The two terms are often used together: “re-bed and repoint.”

Why Pointing Fails

All pointing will eventually fail — it’s a question of when, not if. The rate at which it fails depends on several factors:

Type of Compound Used

Traditional rigid cement mortar pointing was the standard for decades. The problem with rigid mortar is that it doesn’t flex. A tile roof expands in heat and contracts in cold, moving constantly throughout its life. Rigid mortar can’t accommodate this movement, so it cracks — often within a few years of application in a climate like Coffs Harbour’s, where the temperature differential between a hot summer day and a cool winter night is significant.

Modern flexible pointing compounds are polymer-modified and designed to accommodate roof movement without cracking. They bond well to tile surfaces, remain flexible over a wide temperature range, and provide a far more durable seal than rigid mortar. Any pointing work Nathan does uses flexible compound as standard — he hasn’t used rigid mortar for pointing in years, because it simply doesn’t last.

Age

Even quality flexible compounds have a finite lifespan. As the compound ages, it gradually loses its flexibility, becomes brittle, and eventually cracks. Quality modern compounds can last 10–15 years or more before repointing is needed, but older roofs with original mortar pointing may be well past their service life.

UV Exposure

The pointing at the ridge is typically the most exposed part of the roof to UV radiation, heat, and weather. In coastal locations like Coffs Harbour, this exposure is significant and accelerates the degradation of pointing compounds over time.

Biological Growth

Moss and lichen can establish themselves in the porous surface of old mortar pointing, and their growth accelerates deterioration. Plant roots work their way into small cracks, widening them over time. This is another reason why coastal and humid environments like Coffs Harbour tend to have faster pointing deterioration than drier inland areas.

Why Failed Pointing Is Critical

Many homeowners don’t realise how important the pointing is until something goes wrong. Failed pointing can cause two major categories of problems:

Water Ingress

The ridge is the highest point on the roof. Water that gets underneath a ridge cap at the ridge line can travel a long way before it finds a path through to your ceiling. This is why a ridge cap pointing failure often shows up as a ceiling stain somewhere in the middle of the house, well away from any external wall. Homeowners often assume the leak must be coming from somewhere else, when in fact a failed ridge pointing is the cause.

In heavy rain — the kind that Coffs Harbour receives regularly during the wet season — even small gaps in the pointing can allow significant volumes of water into the roof space. And once water is in the roof space, it can spread across insulation, saturate plasterboard, and cause mould growth well before it’s visible from inside the house.

Ridge Tile Displacement

When the bedding and pointing that holds ridge caps in place fails completely, the caps become loose. In strong wind — again, something that coastal Coffs Harbour properties experience regularly — loose ridge caps can lift, shift, or be blown off the roof entirely. This creates an immediate and significant waterproofing failure at the ridge, and loose or displaced ridge caps are also a safety hazard if they fall.

In very severe cases, failed bedding can leave multiple consecutive ridge caps held in place by nothing more than their own weight and friction. This is a situation that needs urgent attention.

Signs Your Roof Needs Repointing

Some signs of failed pointing are visible from ground level; others require a roof inspection to identify. Things to look out for include:

• Visible cracking or gaps in the pointing along ridge or hip lines
• Ridge caps that look slightly out of alignment or appear to be sitting at an odd angle
• Chunks of old mortar on the roof tiles or in the gutters (falling pointing debris)
• Ceiling stains or water ingress without an obvious source
• A roof that’s more than 10–15 years old without any known pointing maintenance
• Moss or lichen growth concentrated along the ridge line

If you’re uncertain about the state of your pointing, Nathan offers a free on-site inspection. Getting up on the roof and actually looking at the pointing is the only reliable way to assess its condition — the view from the ground is often misleading.

The Roof Repointing Process

Roof repointing done properly is a careful, methodical job. Here’s how Nathan approaches it:

Step 1: Remove All Old Pointing

The old pointing is removed in full — it’s not possible to simply apply new compound over old failed material and expect it to last. Cutting back the old pointing also allows Nathan to assess the condition of the bedding underneath. Where the bedding mortar is also failed or soft, it’s removed and replaced as part of the job.

Step 2: Clean and Prepare the Surface

The exposed surfaces are cleaned of debris, old mortar residue, and any biological growth before new compound is applied. Proper surface preparation is essential for adhesion — fresh compound applied to a dirty or crumbling surface won’t bond properly and will fail prematurely.

Step 3: Re-Bed Where Required

Where the bedding mortar under ridge caps has also failed, new bedding is applied and the ridge caps are reset in the correct position. This is done carefully to maintain the correct line and alignment of the ridge caps across the full length of the ridge.

Step 4: Apply Flexible Pointing Compound

New flexible pointing compound is applied to both sides of all ridge and hip caps. The compound is worked carefully into any gaps and finished neatly. A proper pointing job is both functional and tidy-looking — the finished ridge line should be clean, consistent, and professional.

Step 5: Inspection

Nathan inspects the completed work to ensure consistent coverage, good adhesion, and correct application across the full length of the ridges and hips. Any areas that need touching up are addressed before the job is signed off.

Flexible vs Rigid Pointing: Why It Matters

If you’ve had repointing done before and it’s cracking again after only a few years, the likely cause is rigid cement mortar rather than flexible compound. Many operators still use rigid mortar because it’s cheaper and faster to apply. But in a climate like Coffs Harbour — hot summers, wet winters, coastal UV — rigid mortar typically cracks within 3–5 years, leaving you back where you started.

Nathan uses flexible polymer-modified pointing compound on all his repointing work. It costs more and takes longer to apply properly, but it lasts significantly longer and provides a far superior result. This is the difference between a job that lasts 10–15 years and one that needs redoing every few years.

For more information on our full range of services, visit our services page. For information specifically about ridge cap work, see our ridge capping page.

Book a Free Roof Repointing Inspection

If your tile roof is more than 10 years old and hasn’t had the pointing checked recently, it’s worth getting a professional assessment. Failed pointing is one of the most common — and most preventable — causes of tile roof leaks in Coffs Harbour.

Call Nathan on (02) 6638 9959 to book your free on-site inspection. We service Coffs Harbour and surrounding areas including Sawtell, Toormina, Moonee Beach, Woolgoolga, and Bellingen.

How Often Does Roof Pointing Need Replacing?

As a general rule of thumb, roof pointing should be inspected every five to seven years and replaced when it shows significant cracking, separation, or other deterioration. With quality flexible compound and good application technique, you should expect 10–15 years of service life in the Coffs Harbour climate before repointing is needed.

Older roofs that still have original rigid mortar pointing — common on homes built before the mid-1990s — may already be well past their service life regardless of their age, simply because rigid mortar deteriorates faster than modern flexible compounds. If you’ve never had your roof repointed and it’s more than 15 years old, it’s worth getting it inspected.

Can Roof Repointing Be Done in Wet Weather?

No. Repointing requires dry conditions for both the preparation work and the compound application. Fresh pointing needs time to cure before it’s exposed to rain — applying pointing to a wet surface, or having rain fall on fresh pointing before it cures, compromises the adhesion and durability of the job. Nathan schedules repointing work around the weather forecast and will reschedule if conditions are unsuitable. In Coffs Harbour, the drier winter months (June to August) are often the best time for repointing work, though the job can be done in any dry spell throughout the year.

What’s the Cost of Roof Repointing in Coffs Harbour?

The cost of roof repointing depends on the size of the roof, the length of the ridge and hip lines, and the extent of any deterioration requiring full re-bedding rather than just repointing. Nathan provides free on-site quotes so you know exactly what the work will cost before committing. There are no surprises — the quote covers all the work needed to properly complete the job.

It’s worth noting that repointing, done at the right time, is one of the best value maintenance investments you can make on a tile roof. The cost of repointing is a small fraction of the cost of repairing the water damage that failed pointing can cause — ceiling replacement, insulation replacement, and timber repairs can all easily exceed the cost of a full roof repoint many times over.

Repointing as Part of a Full Restoration

Repointing is always included as a component of a full roof restoration. When Nathan carries out a complete restoration — cleaning, repointing, and recoating — the repointing is done as a core part of the process before the coating is applied. Painting over failed or inadequate pointing without addressing it properly is a shortcut that Nathan doesn’t take — the restored appearance would be misleading and the underlying waterproofing problem would remain.

If your roof needs a full restoration rather than just repointing, Nathan will advise you of this during the inspection and provide a comprehensive quote for the full scope of work. The 10 Year Warranty on restoration work covers both the repointing and the coating system.

Nathan Locke: Your Local Repointing Specialist

With 25 years working on tile roofs in the Coffs Harbour region, Nathan has repointed more ridge and hip lines than he could count. He knows the difference between flexible and rigid compound, the difference between a job that will last and one that won’t, and the difference between pointing that needs immediate attention and pointing that can wait for another season. That knowledge and experience is what you get when you call Roof Restoration Coffs Harbour — along with a free inspection, an honest assessment, and a clear, fair quote for whatever work is needed.