Foundations

800 topics in this forum

1. Trench fill acceptable tolerance in level and dip

   By Stu84, September 12, 2025
   • 19 replies
   • 3.5k views
   • 
   • Stu84
   • October 1, 2025

2. Foundations & Drains 1 2

   By Spinny, September 18, 2025
   • 32 replies
   • 4.1k views
   • 
   • Spinny
   • September 30, 2025

3. Garden gravel as hardcore substitute?

   By YodhrinForge, September 25, 2025
   • 2 replies
   • 1.9k views
   • 
   • YodhrinForge
   • September 27, 2025

4. Backfilling under lintel above drain pipe

   By John2000, September 21, 2025
   • 4 replies
   • 1.7k views
   • 
   • John2000
   • September 22, 2025

5. Cutting up my raft foundation

   By Gone West, September 20, 2025
   • 5 replies
   • 1.4k views
   • 
   • Gone West
   • September 21, 2025

6. RC slab and waste drainage

   By LSB, September 20, 2025
   • 2 replies
   • 1.1k views
   • 
   • torre
   • September 20, 2025

7. Shutter Foundations at Boundary ?

   By Spinny, September 17, 2025
   • 2 replies
   • 1k views
   • 
   • Spinny
   • September 17, 2025

8. Step in foundations, flatness of bottom of foundation, sleeving

   By Stu84, September 9, 2025
   • 2 replies
   • 1.4k views
   • 
   • Stu84
   • September 12, 2025

9. Can I use this to level ground under workshop slab

   By Owain1602, September 11, 2025
   • 1 reply
   • 1.2k views
   • 
   • Mike
   • September 11, 2025

10. Running underground drainage through below dpc wall

    By Sunil237, September 8, 2025
    • 3 replies
    • 1.2k views
    • 
    • Sunil237
    • September 9, 2025

11. Insulated Raft - How much better?

    By dsaunders, July 18, 2025
    • 12 replies
    • 1.9k views
    • 
    • Rosslyn
    • September 4, 2025

12. Foundations for garden retaining wall

    By paul1966, August 31, 2025
    • 1 reply
    • 1.1k views
    • 
    • cwr
    • September 1, 2025

13. Raft foundation expansion/movement joint

    By Selexus, August 5, 2025
    • 17 replies
    • 2.5k views
    • 
    • -rick-
    • August 13, 2025

14. Pile Foundation Cost

    By Saul, June 6, 2021
    • 19 replies
    • 18.8k views
    • 
    • Lincolnshire Ian
    • August 4, 2025

15. Rod System

    By MortarThePoint, July 30, 2025
    • 5 replies
    • 1.4k views
    • 
    • MortarThePoint
    • July 31, 2025

16. 7x4 garden room 1 2

    By Jadhacha, July 28, 2025
    • 26 replies
    • 2.7k views
    • 
    • saveasteading
    • July 30, 2025

17. Soil pipe penetrations through slab - which way up?

    By Dunc, April 15, 2025
    • 13 replies
    • 2.3k views
    • 
    • saveasteading
    • July 21, 2025

18. Piling Foundations

    By dsaunders, June 8, 2020
    • 3 replies
    • 4k views
    • 
    • dsaunders
    • July 18, 2025

19. Insulated rafts 1 2

    By Gus Potter, February 12, 2025
    • 26 replies
    • 4k views
    • 
    • Dave Jones
    • July 11, 2025

20. Soil sample Atterberg test

    By Buildbuild, June 21, 2025   

    • atterberg
    • soil test
    • (and 1 more)

      Tagged with:

      • atterberg
      • soil test
      • trees
    • 2 replies
    • 1.4k views
    • 
    • saveasteading
    • June 22, 2025

21. What type of insulation to minimise thermal bridging in this design?

    By Great_scot_selfbuild, June 14, 2025
    • 9 replies
    • 1.6k views
    • 
    • Kelvin
    • June 16, 2025

22. Progress update on my foundation

    By zzPaulzz, May 28, 2025
    • 14 replies
    • 2.4k views
    • 
    • zzPaulzz
    • June 6, 2025

23. Foundations - DPM / Flood zone thoughts?

    By boxrick, June 2, 2025
    • 3 replies
    • 1.1k views
    • 
    • boxrick
    • June 2, 2025

24. Log Cabin Foundations - Concrete Piers

    By iSelfBuild, July 16, 2019
    • 10 replies
    • 13.5k views
    • 
    • Space Race
    • May 31, 2025

25. Adding to existing garage slab

    By crispy, January 30, 2025
    • 1 reply
    • 1.5k views
    • 
    • crispy
    • May 30, 2025