Lead Soakers: Lightweight Roof Detailing Guide
Small but essential, lead soakers provide a waterproof barrier where slates or tiles meet abutments. This guide explains sizing, code selection and fixing methods, aligned with Leadwork Standards.
1. What are Lead Soakers?
Lead soakers are small, individual sheets placed between each course of tile or slate at abutments. They form a stepped waterproofing layer beneath a cover flashing.
2. Code Selection
Code 3 lead is usually sufficient for tile roofs, while Code 4 is recommended for slate roofs. The thicker code compensates for thinner slate courses and higher exposure.
3. Dimensions & Laps
Soakers should extend at least 100 mm up the abutment and 100 mm under the covering material. Length matches the gauge of the slate or tile plus 25 mm lap. Side laps are achieved naturally with each course.
4. Fixing Methods
Soakers are not nailed individually. They are held in place by the tiles or slates above. Always install a cover flashing (usually Code 4) to complete the weatherproof detail.
5. Best Practice
Ensure consistent sizing and overlap. Don’t mix codes within one roof face. Always finish with patination oil on exposed flashings to prevent staining.
FAQs
What lead code is best for soakers?
Code 3 for tile roofs, Code 4 for slate roofs. Thicker codes provide durability in exposed conditions.
How are soakers fixed?
They are not nailed. Each soaker is held in place by the next tile or slate course, with a cover flashing above.
What size should a soaker be?
Minimum 100 mm upstand and 100 mm under-cover extension. Length matches the tile or slate gauge plus 25 mm lap.
Do soakers need patination oil?
Not on hidden areas, but exposed cover flashings above should be treated with patination oil.
Can I use Code 5 for soakers?
Not necessary. Code 3 or 4 is sufficient. Heavier codes add weight and cost without benefit for small details.
Next in the series (Post 9): Chimney Back Gutters — design, sizing and detailing to prevent leaks.
