Insulation to suspended floor, accessible from below. [Version ID #246]
Detail summary
Detail for insulation to a suspended timber floor accessible from beneath to increase thermal efficiency and reduce heat loss.
Target U-Value : 0.2W/m2K
Technical description
Section detail. Floor insulation between joists with air-tightness works. Ground floor- suspended. No ceiling required. To achieve target U-value of 0.2W/m2k.
SUGGESTED INSTALLATION SEQUENCE:
Before start of works: Inspect any structural timbers, particularly those which enter external walls (e.g. floor joists); Inspect sub-floor, and timbers within for signs of damp and rot. Report immediately if any found. If possible record current condition of timbers and moisture content for future reference. Remove any organic matter from sub-floor and floor void. Ensure all existing air-bricks are unobstructed with clear ventilation path
1.) Inspect floor void for signs of rot/damp and report immediately if found. 2.) Carefully remove obstructions from below floor. 3.) Seal between floor boards and fill gaps. 4.) Friction fit insulation between between floor joists and fix in place. 5.) Install webbing to hold insulation in place.
Please refer to Approved documents: B (fire safety): B1 section 1 (material alterations)/ B2 section 3 (internal fire spread), and Appendix A (material properties). Document A (structural safety) should be referred to when fixing/applying loads to existing floor joists or members. Ensure existing joists meet requirements in Approved document A (structural) before starting works. Refer to Doc L: Section 5 of L1B for dwellings; including all relevant amendments.
Parts list
-
Woodfibre Insulation Between Floor Joists [FL01a]
Woodfibre Insulation. \ Thickness 200mm. \ Friction fit between joists to ensure air-tightness- cut batts approx 20mm wider than opening between joists. Supported by Polyester webbing drawn underneath insulation at approx 600mm centres, fixed to joists.
Unger \ www.unger-diffutherm.de \ Reference: UdiFLEX
-
Seal between floorboard. [DP02] and [DP04]
Draught-proof and seal all timber floors to ensure no air-leaks. Draughtproof neoprene strips between floorboards. Standard decorators caulk to wall/floor junctions and skirting boards /OR: additional draughtproof strips
Draughtex. \ www.draughtex.co.uk \ Reference: Draughtex Neoprene Strips
-
Single-sided air seal tape [DP09a]
Tape for junctions critical to air-tightness. 60mm (typical). \ Accesssories: ORCON F sealant and TESCON PRIMER RP (for use on rough/old surfaces to assist adhesion)
Pro Clima \ http://www.greenbuildingstore.co.uk/page--pro-clima-airtightness-tapes-options.html \ TESCON VANA/ TESCON PROFIL (2 release tapes)
-
Polyester webbing to hold insulation
Webbing drawn underneath insulation at approx 600mm centres, fixed to joists.
Contractors choice.
Revisions
-
Admin - 2015-04-30 11:07:40
General reformatting. DWG file uploaded.
| -
Admin - 2015-03-30 11:13:01
Preview image and pdf detail file updated.
| -
Admin - 2015-03-30 10:59:22
Air seal tape removed, code added to webbing in parts list
| -
Admin - 2015-03-26 13:52:16
General re-formatting. Introduction and Technical description expanded. Parts list updated with suppliers lists.
| -
Admin - 2015-03-17 10:23:12 [Displayed version]
Version 3. Parts list updated and errors removed.
| -
Admin - 2015-03-16 17:03:27
Introduction and technical description updated. Parts list updated with codes.
| -
Admin - 2015-03-04 15:20:28
First Version
|
Feedback
A total of 14 users have left feedback about this detail.
Share your thoughts about this detail with other users:
-
User name
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
- Ease of understanding detail: Easy
- Ease of sourcing materials: Easy
- Ease of sourcing skills: Easy
- Ease of implementation: Easy
- Overall cost: Low cost
-
User name
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
- Ease of understanding detail: Easy
- Ease of sourcing materials: Easy
- Ease of sourcing skills: Easy
- Ease of implementation: Easy
- Overall cost: Low cost
-
User name
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
- Ease of understanding detail: Easy
- Ease of sourcing materials: Easy
- Ease of sourcing skills: Easy
- Ease of implementation: Easy
- Overall cost: Low cost
Feedback summary
- 80% of users found this detail easy to implement.
- 50% of users found it easy to source skills for this detail.
- 60% of users found this detail hard to understand.
- 100% of users found the overall cost for this detail to be low.
- 90% of users found materials for this detail easy to source.
Discussion
For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.
User name
Leave a comment