Fibreglass repair for homes and buildings: roofs, doors, baths, pools and more.
A cracked flat roof, a chipped front door, a bath with a crack in the base, a pool that has gone chalky: much of the fibreglass around a building can be repaired, provided what's underneath is still sound and dry.
- WALL / UPSTAND
- TOPCOAT
- NEW MAT + RESIN
- CRACK AT CORNER
- GRP LAMINATE
- DECK
Fibreglass around the home and building.
GRP flat roofs
Cracks, pinholes, worn topcoat, impact damage and failed edge trims on fibreglass roofs over garages, extensions and porches.
Fibreglass doors
Chips, cracks, impact damage and faded or scratched GRP door skins. We manufacture fibreglass doors ourselves, so we know how the skin is built.
Baths & shower trays
Stress cracks, chips and small holes. Cracks usually appear in the base, where the moulding flexes under load.
Pools & ponds
Star cracks, blisters and chalky, faded gelcoat in fibreglass pools and ponds.
Planters
Cracked, chipped or faded GRP planters.
Canopies
Door and porch canopies with cracks, impact damage or weathered gelcoat.
What goes wrong, and where.
Roof cracks at corners and edges
On a GRP roof, cracks cluster where the roof changes direction or meets something else: corners, edges, rooflights, outlets and wall abutments. Causes include movement in the deck, thermal expansion, impact and age.
Pinholes and worn topcoat
The topcoat is a roof's protective finishing layer. Once it has worn thin or pinholed, the laminate beneath is less protected.
Soft or spongy areas
A roof that gives underfoot points to failed decking, trapped moisture or delamination — a sign the problem goes deeper than the surface.
Stress cracks in baths and trays
Usually in a poorly supported base. Some are shallow; deep ones can leak.
Star cracks, chalking and blisters in pools
Star cracks follow impact or movement. Chalking is sunlight breaking down the gelcoat surface. Blisters point to moisture trapped in the laminate.
Chips, fading and loss of gloss
Outdoor gelcoat dulls and fades in sun and weather, and knocks chip it. Small cracks left alone let water in and get worse.
The method depends on how deep the damage goes.
Surface damage is dealt with at the surface. Damage in the laminate means cutting back and rebuilding. This is how the work is typically done.
- 01Find the extent and the causeHow far the damage runs, and whether what is underneath — roof deck, bath base, pool shell — is sound and dry. A repair laid over wet or soft decking will not last.
- 02Clean, dry and keyThe area is cleaned and abraded beyond the edge of the damage, so new material has a sound, dry surface to bond to.
- 03Cut back and reinforceLoose or fractured laminate is cut away. A hairline crack may need only a repair coating; wider cracks, holes and punctures are rebuilt with glass matting and resin.
- 04CureThe resin is left to cure. Rain, frost, heavy dew and low temperatures all interfere with adhesion and cure.
- 05Topcoat and finishRoofs are finished with topcoat. Baths, pools, doors and planters are finished in gelcoat or paint, then sanded and polished to blend with the surface around them.
Where the work happens.
On site
Roofs, fitted baths and shower trays, pools, ponds and fixed canopies are repaired where they are. Outdoor work depends on the weather: a repair has to stay dry until the resin has cured, which makes spring to early autumn the most reliable time for roof work.
In our workshop
Doors, planters and anything else that can be removed are easier to repair and refinish under cover, and can be brought to our workshop.
- On-site coverage area: to be confirmed · placeholder
- Workshop address: to be confirmed · placeholder
Repair if the structure is sound. Replace if it isn't.
Repair usually suits
- Local damage: a crack, a puncture, a blister, a worn patch.
- A laminate that is sound, dry and well bonded.
- A roof whose deck is dry and firm underfoot.
- A fitted item that would be disruptive to replace — a bath usually went in before the tiling and flooring around it.
Replacement is usually better when
- A roof deck is soft, delaminated or leaking in several places.
- Cracks keep returning, which points to movement in the structure.
- Poor drainage or structural failure is causing the damage.
A roof often can't be judged from photographs alone: the condition of the deck may need checking on site.
What to tell us.
- What it is, and roughly how old.
- The size of the item or roof, and of the damaged area.
- Photos: a close-up and a wider view.
- For roofs: where it leaks, any standing water, and how the roof can be reached.
- For baths and trays: whether the underside can be reached.
- For pools: the colour, and the manufacturer if you know it.
- Any previous repairs.
Home and building repair questions.
Can a GRP flat roof be repaired, or does it need replacing?
Usually it can be repaired, provided the laminate is sound, dry and well bonded to the deck. Replacement is the better option when the deck is soft, the roof leaks in several places or cracks keep returning.
Why has my fibreglass roof cracked?
The common causes are movement in the deck, thermal expansion, impact, poor installation, age and trapped moisture. Cracks tend to appear at corners, outlets, rooflights, upstands and edges.
Is a small crack in a GRP roof serious?
A small crack doesn't mean the roof has failed, but it shouldn't be left. Water gets in, and frost and repeated wetting make it worse.
Is a fibreglass roof different from a GRP roof?
No. GRP — glass reinforced plastic — is the technical name for fibreglass. They are the same thing.
Can a GRP roof be repaired in winter?
Rain, frost, heavy dew and low temperatures all affect how resin bonds and cures, so an outdoor repair needs a dry, mild spell. Spring to early autumn is the most reliable time.
Can a cracked fibreglass bath or shower tray be fixed?
Often. Shallow cracks can be refinished; deeper ones can leak and need the base reinforcing. Many baths and trays are acrylic or stone resin, not fibreglass, and the repair differs.
Can a blistered or chalky fibreglass pool be repaired?
A chalky, weathered surface can be prepared and recoated. Blistered areas have to be sanded back and dried before they are coated. How much work that is depends on how widespread it is.
Can you repair a fibreglass front door?
Yes — fibreglass doors are among the things we repair. Surface damage to a GRP door skin, such as chips, scratches, small cracks or a faded finish, can often be repaired and refinished. Send photos and a description of what has happened to the door.
Not quite what you have?
Tell us what's cracked, leaking or worn.
What it is, how big the damage is and where it is — and we'll come back to you about a repair.