At SE Knotweed, combination treatment pairs two or more methods on one site, such as a reduced-level dig with soil screening and a residual herbicide programme, where a single method does not fit the whole area. It balances speed, cost and the constraints of the plot.
Combination treatment costs from around £3,000 to £9,000 depending on the mix of methods and the soil volume, and we confirm the figure at survey.
At SE Knotweed, combination treatment brings together more than one method on a single site, because real gardens and plots rarely suit one approach across the whole area. A typical mix is a reduced-level dig, soil screening and a residual herbicide programme on what remains.
It is the method for awkward, mixed or access-restricted sites, and we design the mix from the survey findings rather than forcing a single technique. Book a survey to see what your site needs.
A reduced-level dig removes the densest, most contaminated soil for licensed disposal or burial, cutting the volume that has to leave site. We then screen the remaining soil to pick out rhizome fragments, so clean material can stay and only the contaminated fraction is treated or removed.
Screening lowers the disposal cost, which is the expensive part of excavation, while still clearing the ground far faster than herbicide alone.
A combination suits sites where part of the stand must go quickly, for a build or a sale, while another part can be contained or treated over time, and where mixing methods cuts the cost against a full dig.
It also fits plots with restricted access or services in the ground, where a barrier protects one line while the rest is dug or treated. We set out the plan at survey.
Combination treatment costs from around £3,000 to £9,000, driven by how much soil is dug and disposed of, how much is screened and retained, and the length of any residual herbicide programme.
Because it trims the disposal volume, it usually sits below a full excavation while clearing the site faster than herbicide alone. We give a fixed figure at survey.
Yes. Combination work by an audited specialist is backed by an insurance-backed guarantee that a mortgage lender accepts, with any residual programme covered through its monitoring period.
We hand over the management plan, the waste transfer notes for soil that left site, and the guarantee certificate on completion.
Tell us the address and what a surveyor flagged. We confirm the plant, record the RICS category and set out the figures.