Quick Answer:
Slow drains that get worse in spring are commonly caused by tree roots re-invading the main lateral where small cracks or joints allow roots in. Start by comparing current symptoms to last spring and then arrange a camera inspection early in the season. A qualified technician can map the roots and recommend targeted removal and barrier options. Track results year-to-year to decide whether repeat pruning or permanent barriers are needed.
Why This Happens
In spring the soil warms and moisture often increases, which signals roots to grow more actively. Roots seek water and nutrients and will exploit tiny breaks in sewer pipes. If roots have entered previously, partial blockages can reopen into larger obstructions as the root mass thickens. Watch for increased clogging during the warm, wet weeks of spring because of this spring root growth.
Step-by-Step What to Do
Step 1 — Compare this year to last year
- Note which fixtures slowed first last spring and which are slow now (toilet, shower, washing machine, yard clean-up drains).
- Write down timing: did the slowdown start with the first thaw/rain or later in the season?
- Compare whether odors, gurgling, or backups happened then and now.
Step 2 — Schedule a camera inspection early
- Book a camera inspection in early spring while roots are actively growing and symptoms are present. This gives the clearest view of root intrusion and pipe condition.
- A camera will show the location, extent of root growth, and whether cracks, offsets, or collapsed sections exist.
Step 3 — Ask for mapping and targeted solutions
- Have the technician map root locations relative to nearby trees and landscaping so you know which trees are associated with the intrusion.
- Request targeted root removal options (mechanical cutting or professional chemical treatment applied by a plumber) rather than random cutting.
- Discuss long-term measures such as root barriers, pipe lining, or spot repairs based on what the camera shows. A focused plan minimizes repeat visits and damage to trees.
Step 4 — Track outcomes year-to-year
- Keep notes each spring: which fixtures slowed, whether a camera was done, what repairs were made, and how effective they were.
- If roots recur in the same spot, you’ll have data to justify more permanent measures like trenchless pipe repair or barriers.
- For related seasonal effects on underground roots, review guidance on roots after winterization to understand timing and treatment windows.
What Not to Do
- Avoid seasonal root cutting near the house without a professional plan; cutting at the trunk can promote more aggressive regrowth — call a pro when problems return every spring or when multiple fixtures show progressive slowing.
- Do not attempt major excavation or invasive pipe repairs without a licensed plumber and proper permits; this can damage utilities and increase costs.
- Avoid pouring random chemical drain cleaners or concentrated root-killing chemicals into the system without professional advice; misuse can harm pipes, septic systems, and plants.
When to Call a Professional
- Multiple fixtures slow at the same time (kitchen and basement fixtures, or toilets and showers).
- Recurring slow drains each spring even after snaking or cleaning.
- Sewage odors, gurgling sounds, or any sign of backups or pooling on the property.
- Visible tree roots near sewer access points or if a camera inspection shows roots inside the pipe.
Safety Notes
- Sewer work involves wastewater; avoid direct contact and keep children and pets away from any pooling or backups.
- Professional root removal and pipe repairs require specialized tools and safety precautions. Let trained technicians handle confined-space work and chemical treatments.
- Keep records of inspections and repairs so contractors can plan safe, effective follow-up work without unnecessary digging.
Common Homeowner Questions
- How fast do roots regrow after removal? — Regrowth speed varies by species and severity; some roots regrow within months, others take years, which is why tracking year-to-year matters.
- Will a single root cutting fix the problem? — Often it’s only a temporary fix; mapping and barriers or pipe repair are usually needed to prevent recurrence.
- Can I prevent roots by removing a tree? — Removing the tree can help long-term, but roots already in the pipe may remain active for a time; consult a pro before cutting major trees near sewer lines.
More in this topic
For more related fixes and similar symptoms, see Tree Root Intrusion Patterns.