Independent Kent roofer with over 30 years experience · Direct personal service across Sittingbourne and North Kent
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Should I Repair or Replace My Tiled Roof?
When water starts dripping through a bedroom ceiling or you find broken tile shards on the driveway after a gale, the immediate fear is that you are facing the expense of a complete new roof. In reality, a large share of roof leaks come down to a single failed component—and I will never tell you to strip a roof that only needs a straightforward repair.
The Short Answer: Repair vs. Replacement
How a Tiled Roof Actually Keeps Water Out
I have been climbing onto roofs around Sittingbourne, Faversham, and the Medway towns for over thirty years. One of the biggest misconceptions homeowners have is that roof tiles form a completely sealed, watertight lid. They don't. Whether your home has 1970s concrete interlocking tiles, Victorian Welsh slates, or handmade Kent peg tiles, wind-driven rain and fine snow will occasionally blow up underneath the overlaps.
That is why what sits underneath your tiles matters just as much as the tiles themselves. Beneath the outer covering lies a sheet of roofing felt (or modern breathable membrane) stretched over the rafters, held in place by horizontal timber battens. Any moisture that gets past a tile is supposed to land on that underlay and run safely down into your guttering. Deciding between a local repair and a full strip and retile almost always comes down to the condition of those hidden layers.
Perished 1F Bituminous Felt & Rotten Battens
Look closely at the photo above from a job we stripped back. The outer concrete tiles still looked half-decent from the pavement across the street. However, once lifted, the old bitumastic underfelt had completely shredded with age, and the timber battens had rotted through from decades of trapped condensation and slow leaks.
pay someone to swap three cracked tiles on a roof like this, the rain will simply bypass the next tile along, drop straight through the torn felt, and stain your ceiling again the following winter.
Breathable Membrane & Treated Grading Battens
When we carry out a full renewal, we strip the roof right back to the bare rafters. We then lay a high-tensile breathable membrane and fix brand-new, tantalised timber battens before any tiles go back on.
Notice how the underlay is dressed cleanly around the chimney stack and roof window. If your original tiles are good-quality clay or slate, we can often salvage and re-lay them over this fresh substructure, only buying matching reclaimed tiles to make up the shortfall.
5 Checks You Can Safely Make From Inside Your Loft
You should never climb a ladder onto a pitched roof yourself, especially when tiles are damp or brittle. Instead, take a bright torch up through your loft hatch during daylight hours and check these five indicators before calling a roofer out.
Pinpricks of Daylight
Switch off your torch and look up. On older period properties in places like Faversham or Rochester that were built without underfelt ("torched" roofs with lime mortar on the back of the tiles), seeing tiny chinks of light indicates slipped tiles or fallen mortar. If you see a clear patch of sky on a felted roof, both the tile and the felt have failed at that spot.
Sagging or Torn Underfelt
Touch the black felt between the timber rafters gently. On homes built between the 1950s and 1980s, traditional 1F bituminous felt eventually dries out and turns as brittle as old newspaper. If it crumbles when touched or has large bellies of water pooling in it, spot repairs from the outside won't cure the underlying issue for long.
Damp Around the Chimney Breast
Shine your torch where the brick chimney stack passes through the roof timbers. If the rafters are bone dry everywhere else in the loft, but the brickwork and timber trimmers around the chimney are dark and wet, your main roof is likely fine. You probably just need leadwork and flashing repairs or chimney repointing.
White Powdery Dust or Tile Flakes
Look on top of your loft insulation for red clay flakes, broken nibs (the little lugs that hook tiles onto the timber battens), or rusted nail heads. When old clay tiles absorb moisture and freeze repeatedly, they delaminate—peeling apart like pastry. Once nibs start snapping off across the pitch, tiles will continually slide out of place.
Rotten Eaves (The Bottom Edge)
Even if the top 90% of your roof felt is sound, the bottom 300mm where the felt tucks into the gutter almost always rots first due to UV sunlight and standing water in blocked gutters. If water is running down your cavity wall or soaking the soffits, we can often strip just the bottom three courses of tiles and install rigid uPVC eaves trays without replacing the whole roof.
I'll Inspect It Personally
When you call C.L. Baker, I don't send a commission-based salesperson. I come out myself, check your loft and roof exterior, and give you a plain-English appraisal.
4 Common Faults That Only Need a Targeted Roof Repair
Over the years, I have been called to plenty of homes where the owner had been told by a cold-caller that their entire roof was "condemned," when in reality only a junction detail had failed. Before committing to a full replacement, always check whether the problem is confined to one of these four areas:
1. Failed Valley Gutters (Lead or GRP)
Where two roof pitches meet in an internal 'V' shape, thousands of litres of rainwater channel down a single valley trough. On older properties across Kent, the original zinc or lead sheet eventually cracks from thermal expansion, or cement mortar pointing along the tile edges drops out and dams the water. We can strip back the tiles on either side of the valley, renew the trough, and re-bed the cut tiles without touching the rest of your roof.
2. Loose Ridge Tiles & Perished Gable Verges
Especially on coastal properties around Sheerness, Whitstable, and Herne Bay, driving salt winds eat away at old sand-and-cement mortar along the top ridge line and gable ends. If your ridge tiles are rocking in the wind or mortar is dropping into the gutter, the main body of the roof doesn't need stripping. We can remove the loose ridge tiles and upgrade them to a mechanically fixed dry ridge system screw-fixed directly into the ridge board.
3. Concrete Tile Granule Loss vs. Structural Failure
If your house was built between 1960 and 1990 with interlocking concrete tiles (such as Marley Moderns or Redland 49s), you might notice grit washing into your gutters or moss growing heavily on the surface. Losing the surface colour coat doesn't automatically mean the tile is porous. Concrete tiles routinely last 50 to 60 years; unless they are cracking down the middle or the underfelt beneath has failed, a careful roof clean and replacing broken individual tiles will keep them watertight.
4. Redundant, Leaking Chimney Stacks
Sometimes a persistent damp patch on an upstairs chimney breast has nothing to do with your roof tiles at all—it is caused by porous, spalled brickwork, cracked flaunching around the chimney pots, or split Code 4 lead step flashings. If the fireplace is boarded up and no longer used, removing the chimney stack below the roofline and tiling straight over the gap permanently eliminates the weak spot for a fraction of the cost of a new roof.
The Economic Tipping Point: Why "Patching" Eventually Costs More
One practical reality of the roofing trade is the cost of safe access. For a minor repair near the gutter line or a quick slipped tile fix, I can often work safely from a roof ladder or mobile staging tower. However, once a roof needs heavier repairs higher up the pitch—especially on tall three-storey Victorian terraces in Rochester, Chatham, or Sittingbourne—proper scaffolding is essential.
If you are paying for scaffolding to go up every eighteen months to chase a new leak across a perished 70-year-old roof, you will quickly spend half the price of a new roof without adding a penny of value to your property.
When we reach the point where climbing onto the roof to replace one brittle Kent peg tile cracks three more around it ("nail sickness" or brittle laths), I will tell you plainly that your money is better spent stripping the roof once, renewing the battens and membrane, and solving the problem for the next forty years.
Special Note on Period & Kent Peg Tile Roofs
If you own an older cottage in Faversham, Canterbury, or surrounding villages with authentic handmade Kent peg tiles or Welsh slate, "replacing" the roof does not mean throwing your historic tiles in a skip. We carefully strip and stack the original clay tiles by hand, upgrade the breathable felt and battens beneath, and re-hang your existing tiles—sourcing weathered reclaimed matches only for the broken ones.
Rules to Know Before Replacing a Roof in Kent
A simple repair—like replacing twenty broken tiles or re-leading a chimney—requires no paperwork at all. However, if you cross the line into stripping and replacing the roof, three important UK regulations come into play that every homeowner should understand before accepting a quote.
Building Regulations Part L (The 25% Rule)
Under UK Building Regulations, if you strip and re-cover more than 25% of your roof's surface area, the work is classed as a renovation of a thermal element. It must be notified to Building Control (administered locally across Swale, Medway, and Canterbury by the South Thames Gateway Building Control Partnership), and your loft insulation must be topped up to meet current Part L energy efficiency standards. You will need the completion certificate when you eventually sell your house.
Structural Loading & Conservation Rules
Swapping thin, lightweight natural Welsh slates for heavy concrete interlocking tiles adds substantial deadweight to Victorian roof rafters. If a new covering is significantly heavier (or lighter) than the original, Building Control requires a structural check to ensure the roof timbers won't bow. Furthermore, in conservation areas across Faversham, Rochester, and Canterbury, you must match existing traditional materials like-for-like to satisfy local planning rules.
Terraced Houses & The Party Wall Act
If you live in a semi-detached or terraced property, your roof tiles join directly onto your neighbour's roof along the shared party wall line, and you often share a central chimney stack. When we strip and retile up to a neighbour's boundary, we fit weatherproof bonding gutters so the new tiles join seamlessly with theirs. Always keep your adjoining neighbour informed, and be aware of the Party Wall etc. Act 1996 if work involves shared chimney stacks or parapet walls.
Want to read the official council and government rules on roof alterations? We keep a full directory of local planning and building control resources.
View Official Local Guidance →Questions Homeowners Ask Me on Site Surveys
Can you just replace the felt underneath without buying brand-new tiles?
Yes—provided the existing tiles are in sound structural condition. Because the felt sits beneath the timber battens, we still have to lift all the tiles off the roof to replace the felt (you cannot effectively re-felt a roof from the inside of the loft). However, if your existing clay tiles or slates have plenty of life left in them, we stack them on the scaffolding, lay new breathable membrane and treated battens, and re-lay your existing tiles to save you the cost of new materials.
How long does a full strip and retile take on an average house?
For a standard three-bedroom terraced or semi-detached house around Sittingbourne, a full strip and retile typically takes between 5 and 8 working days once the scaffolding is erected. Crucially, your home is never left open to the rain overnight. Once the old tiles are stripped and the new breathable membrane is battened down (usually achieved on day one or two of each pitch), your loft is completely watertight while we tile over the top.
Will spray foam inside my loft fix a leaking roof and save replacing it?
No—and I strongly advise homeowners to steer clear of spray foam applied to the underside of roof tiles or felt. Spray foam traps moisture against your timber rafters and battens, accelerating timber rot out of sight, and makes it impossible to carry out basic tile repairs from outside. Worse still, many UK mortgage lenders refuse to lend on homes with spray-foamed roofs until the entire roof is stripped and replaced.
If I call you out to look at a leak, who actually turns up?
I do. I run an independent, owner-operated business based in Bapchild, Sittingbourne. I don't employ salesmen and I don't subcontract jobs out to third-party gangs. When you phone me, I inspect the roof myself, show you photographs of what is happening up there, and give you a straight, fixed-price quote for either the repair or the renewal.
Related Services & Guides
Tiled Roofing Services in Sittingbourne and Across Swale
Expert tiled roofing in Sittingbourne by Chris Baker. Specialists in strip and retile, Kent peg tiles, and leak repairs. Call 01795 904566 for a survey.
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Can I Replace Clay Tiles With Heavier Concrete Tiles?
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Want an Honest Second Opinion on Your Roof?
Whether you have a sudden leak after heavy rain or you are weighing up whether an older roof in Sittingbourne, Faversham, Sheerness, or Medway needs repairing or replacing, give me a ring directly.
If I am halfway up a roof when you call, leave a quick message and I will get straight back to you as soon as I am down the ladder.