Compare pitch fibre drain repair quotes
Pitch fibre drains were fitted to millions of post-war UK homes and most are now past their design life. Compare rerounding, relining and replacement quotes from up to 3 verified local specialists.
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Pitch fibre pipe — wood cellulose bound in coal tar pitch — was installed in huge quantities between roughly 1950 and 1970 as a cheap, light alternative to clay. It was sold with a fifty-year life and it has reached it. The failure mode is distinctive: the pipe softens, squashes oval under load, and blisters inwards, so the bore narrows and the drain blocks repeatedly with nothing obvious to clear.
Do not let anyone jet it at full pressure
Pitch fibre that has already deformed can be split or further collapsed by a high-pressure jetting nozzle. If your house dates from the 1950s or 60s and the drain keeps blocking, say so when you book — the right first step is a camera survey, not a jetting hose.
Typical cost
Rerounding and lining a run; full excavation and replacement sits at the top of the range
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What’s involved
Pitch Fibre Pipe Repair
A CCTV survey identifies the material and how far the deformation has gone. Black or dark brown pipe with an oval bore and internal blistering is the signature.
A winch-drawn die is pulled through to force the pipe back to a circular section. This is a specialist operation and not every drainage firm carries the kit for it.
Immediately after rerounding, a structural liner is cured in place to hold the new shape permanently — a no-dig repair with a fifty-year design life. Where the pipe has broken up rather than deformed, excavation and replacement is the only route.
FAQs
Pitch Fibre Pipe Repair questions
How do I know if I have pitch fibre drains?
The strongest clue is the age of the house: pitch fibre was used widely in UK homes built between about 1950 and 1970. On camera it appears as dark brown or black pipe with an oval rather than round bore, often with blisters pushing inwards. A CCTV drain survey confirms it in minutes.
Is pitch fibre pipe covered by insurance?
Usually not on its own. Insurers generally treat pitch fibre deterioration as wear and tear or gradual deterioration rather than sudden damage, so it is commonly excluded. Where a pitch fibre pipe has caused an actual collapse and subsidence damage, the resulting damage may still be covered — which is why the survey report wording matters.
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