Heat Insulation

1457 topics in this forum

1. Help needed - mistakes were made with EWI

   By maznaz, April 20
   • 5 replies
   • 1.3k views
   • 
   • Temp
   • April 21

2. PIR above rafters only with dMEV

   By allthatpebbledash, April 5
   • 9 replies
   • 1.5k views
   • 
   • allthatpebbledash
   • April 8

3. Internal insulation for block cavity walls 1 2 3

   By Julestools, January 9
   • 60 replies
   • 6.7k views
   • 
   • torre
   • April 2

4. What's the best wall structure to balance performance and cost in a new stick frame extension, and is continuous insulation worth it? 1 2

   By Jess Shannon, March 31
   • 27 replies
   • 2.5k views
   • 
   • Roger440
   • April 1

5. Does insulating ceiling where there is a warm roof above reduce heating demand? Any downsides & what is MVHR impact?

   By Willus, July 16, 2025
   • 7 replies
   • 2.3k views
   • 
   • Willus
   • March 31

6. insulating wooden outbuilding?

   By marmic, March 28
   • 3 replies
   • 1.2k views
   • 
   • marmic
   • March 29

7. Installation of EPS

   By saveasteading, March 23
   • 10 replies
   • 1.4k views
   • 
   • saveasteading
   • March 27

8. How best to insulate a steel beam...

   By iSelfBuild, March 25
   • 3 replies
   • 1.1k views
   • 
   • Super_Paulie
   • March 26

9. Cellulose insulation at velux windows - problem

   By Dunc, March 24
   • 7 replies
   • 1.3k views
   • 
   • Iceverge
   • March 25

10. IWI for 1930s solid brick wall

    By Chloe, March 15
    • 14 replies
    • 1.5k views
    • 
    • SteamyTea
    • March 23

11. Second Floor - VCL/Insulation Queries

    By Jammy5, March 17
    • 1 reply
    • 990 views
    • 
    • Redbeard
    • March 17

12. Insulate in Recess of Fireplace

    By BingoBango, March 13
    • 0 replies
    • 814 views
    • 
    • BingoBango
    • March 13

13. Which airtight tape is needed?

    By ruggers, February 11
    • 20 replies
    • 1.7k views
    • 
    • ruggers
    • March 6

14. Damp condensation in built-in wardrobe

    By steveoelliott, February 25
    • 8 replies
    • 1k views
    • 
    • steveoelliott
    • March 3

15. Hot plant room 1 2

    By Benpointer, February 27
    • 29 replies
    • 2.1k views
    • 
    • SteamyTea
    • March 1

16. Target U-values… Cost/benefit sense check… What am I missing? 🤷🏻‍♂️ 1 2 3 4

    By fatgus, February 15
    • 87 replies
    • 8.8k views
    • 
    • craig
    • February 22

17. Air tightness tape yes, no?

    By Selfbuildsarah, February 12
    • 8 replies
    • 932 views
    • 
    • Nickfromwales
    • February 13

18. Spray foam on cold bridge steels 1 2

    By NCXo82ike, January 22
    • 36 replies
    • 2.5k views
    • 
    • Nickfromwales
    • February 10

19. How to attached studwall with cavity with no ceiling connection

    By Bruce, February 3
    • 11 replies
    • 1.1k views
    • 
    • Bruce
    • February 9

20. Warm roof design using pozi joists mid build - to many holes in the conditioned space layer

    By andeebee, November 29, 2025   

    • insulation
    • posi-joists
    • (and 2 more)

      Tagged with:

      • insulation
      • posi-joists
      • warm roof
      • air tightness
    • 18 replies
    • 1.8k views
    • 
    • Russell griffiths
    • January 26

21. Fixing plasterboard to IWI

    By Hammertime, January 15
    • 10 replies
    • 1.2k views
    • 
    • Hammertime
    • January 26

22. How to make structure airtight

    By Silly Man, November 6, 2025
    • 3 replies
    • 1.1k views
    • 
    • Andeh
    • January 22

23. Insulating from the outside: wood fibre vs rockwool vs perforated polystyrene 1 2 3

    By Garald, October 18, 2024
    • 73 replies
    • 14k views
    • 
    • Garald
    • January 17

24. Recognised Construction Detail for Gable

    By Jammy5, January 16
    • 7 replies
    • 813 views
    • 
    • Jammy5
    • January 17

25. Maintaining air tightness with downlighter

    By Annker, January 14
    • 13 replies
    • 1.2k views
    • 
    • MikeGrahamT21
    • January 14