Waterproofing & Sealants

52 topics in this forum

1. Waterproofing window sill with too little incline

   By Bruce, December 28, 2025
   • 9 replies
   • 707 views
   • 
   • Nickfromwales
   • January 17

2. Room knock through - what about DPC?

   By JFH777, December 10, 2025
   • 6 replies
   • 681 views
   • 
   • Nickfromwales
   • December 11, 2025

3. What render to use around upvc window frames fitted flush to timber frame.

   By JCL, December 6, 2025
   • 0 replies
   • 354 views
   • 
   • JCL
   • December 6, 2025

4. Leaking Roof

   By Leakyroof, December 2, 2025
   • 3 replies
   • 473 views
   • 
   • jack
   • December 4, 2025

5. water proofing my exterior walls

   By scottishjohn, November 14, 2025
   • 4 replies
   • 678 views
   • 
   • scottishjohn
   • November 17, 2025

6. Dilemma - Dug trench now foundations are exposed?

   By InspiredSloth, February 19, 2025
   • 2 replies
   • 1.9k views
   • 
   • Markuz
   • October 17, 2025

7. Fixing a hole where the rain gets in. (new AC pipe into PassivHaus)

   By puntloos, August 4, 2025
   • 5 replies
   • 2.2k views
   • 
   • JohnMo
   • September 26, 2025

8. What shoud be done on the edge of the door the unexpanding form is crumbly

   By Mubbashshir, September 15, 2025
   • 9 replies
   • 1k views
   • 
   • Oz07
   • September 15, 2025

9. i have used mapei flexible grout not ultraplus which is water proof. Anything I can do to protect from mould

   By Mubbashshir, September 15, 2025
   • 2 replies
   • 955 views
   • 
   • nod
   • September 15, 2025

10. Restarted on the build - any views on how to waterproof the cavity/retaining wall like a basement?

    By AdTee, July 3, 2025
    • 4 replies
    • 1.5k views
    • 
    • AdTee
    • July 9, 2025

11. Mould on floorboards/battens

    By Cookie, May 8, 2025
    • 4 replies
    • 1.7k views
    • 
    • Cookie
    • May 9, 2025

12. Recommend a good translucent exterior sealant please

    By SilverShadow, January 12, 2025
    • 5 replies
    • 3.1k views
    • 
    • SilverShadow
    • January 17, 2025

13. Using foil insulation on a stud wall to prevent damp penetration.

    By Frazer G, January 12, 2025
    • 5 replies
    • 2.4k views
    • 
    • Mike
    • January 13, 2025

14. Roof Leaking but can't find the cause of it.

    By Chanpreet2675, September 26, 2024
    • 2 replies
    • 2.5k views
    • 
    • ProDave
    • September 26, 2024

15. Painting bricks with bitumen DPM

    By JohnBishop, April 25, 2024
    • 12 replies
    • 4.9k views
    • 
    • Andeh
    • September 15, 2024

16. Shower niche error: how to put it right…?

    By Omnibuswoman, June 20, 2024
    • 7 replies
    • 2.1k views
    • 
    • Nestor
    • June 20, 2024

17. Is this tube of Silicone Sealant probably "dead"?

    By David001, June 14, 2024
    • 11 replies
    • 2.9k views
    • 
    • SteamyTea
    • June 15, 2024

18. Humidity damage? Mold?

    By Garald, May 18, 2024
    • 10 replies
    • 2.7k views
    • 
    • Garald
    • May 21, 2024

19. Waterproof Balcony Floor

    By Ambaz79, May 2, 2024
    • 17 replies
    • 5.5k views
    • 
    • scottishjohn
    • May 16, 2024

20. Kitchen ceiling mould

    By Natalia L, April 3, 2024
    • 2 replies
    • 2.8k views
    • 
    • mike2016
    • April 7, 2024

21. Wet cills

    By Jimbo37, March 6, 2024   

    • window cills
    • window sills
    • (and 1 more)

      Tagged with:

      • window cills
      • window sills
      • wet windows
    • 4 replies
    • 3k views
    • 
    • Jimbo37
    • March 6, 2024

22. Waterproofing exterior wall below ground

    By Bosi, February 27, 2024
    • 3 replies
    • 4.6k views
    • 
    • Mike
    • February 28, 2024

23. Pitched Gutter

    By sergiu, February 7, 2024
    • 5 replies
    • 3k views
    • 
    • kandgmitchell
    • February 8, 2024

24. water dripping down on the outside of chimney pipe and condensation

    By natlak, January 13, 2024
    • 0 replies
    • 2.6k views
    • 
    • natlak
    • January 13, 2024

25. Scottish stone wall penetrative Damp

    By SeaSocks, January 4, 2024
    • 0 replies
    • 2.6k views
    • 
    • SeaSocks
    • January 4, 2024