I've read an earlier thread on this. I've got a quote for digging out the drain and it is not cheap!
We used to have a big tree in the garden, we got rid of it before the roots damaged the foundations, but, it seems, not before the roots damaged the drain. Two years after the tree has gone we had a blocked drain. They used a powerful machine (roto-router, I think) to slice through the blockage, though they had to have two goes.
All seemed fine until now, three weeks later, there's another blockage. This cleared with repeated flushing, but the plumber, who provided the quote to upset the rest of my Friday, is of the opinion that their machine chopped out the root, but has now left a hole in the pipe, which will cause blocking again intermittently.
A poster said that big sewers can have plastic lining applied to deal with cracks and leaks. Why should this be so expensive for a domestic foul drain? What products exist? It would seem to me, in my simple minded way, that an inner skin of rubber could be introduced from the bottom and stuck to the walls removing the problem. Why is this so difficult?
Given the price, the only option that I see as realistic is to go out to buy a pick and spend the weekend digging the drain out myself. Much as I understand the benefit this will give me in terms of improved physique, I'm not that keen on the option.
What if I got liquid rubber and poured it down the pipe - it'd fill in the crack and then dry - would that work?
I suppose another alternative would be to get a wi-fi camera on a stick with a led attached and see if I can see exactly what the problem is. Then I could use modified keyhole surgery techniques to apply a rubber or silicon seal directly to the spot. Exactly how impractical is this?
I'm not a very practical sort, actually, though I did fit a new oven, hob and worktop with no electrical or handyman assistance this last week, something I'm ridiculously proud of, so maybe I'm ready for keyhole drain surgery.