Sub floor & perimeter insulation to suspended timber floor. [Version ID #97]
Detail summary
For use where floor void inaccessible by usual means and is not possible to lift whole floor. Floor void ventilation to be controlled to ensure reduced risk of condensation and humidity build up within void.
Technical description
Section detail. Sub-floor insulation with stand-alone perimeter insulation (exterior wall) to suspended timber floor. Including ventilation of sub-floor with air inlet (controlled).
Recommended preparation:
Inspect sub-floor and timbers for signs of damp and rot. sub-floor of all detritous - especially timber and organic materials. Remove any plastic ground coverings. Note positions of gas pipes, wiring and other services. Where necessary fix services to underside of joists for future access/ safety.
Carefully create an access hatch for approximately each 4sqm of floor, approximately the distance between the joists x 2-3 floorboards, in such a way that these can be put back afterwards. Sufficient to gain access to underfloor void as needed and/or use existing floor access hatches. (Denail floorboards and set aside for reuse on site & remove projecting nails from joists after board removal.)
For Hatch: Fix pieces of floorboard together to form hatch. Edge trim as necessary to underside to create air-tight seal. Where floorboards exposed, ensure finish is high quality and of sound appearance.
Parts list
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Lightweight Aggregate Insulation to Sub-floor (Granular)
Lightweight recycled glass aggregate. Pour insulation in through the hatches and rake across the floor from above to achieve an even spread with minimum depth 200mm -taking care not to damage underfloor gas pipes and services. 50mm min. air gap to underside of joists. Ensure vents are not covered.
Misapor (technopor or glapor as alternatives) \ www.misapor.ch \ Reference: MISAPOR
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Ventilation Fan Unit Wall Mounted
Small humidity controlled fan to assist in sub-floor ventilation and avoid excess humidity in floor void. Fan only - both extract/ intake. To achieve 0.5 ach in floor void in winter conditions. \ Accessories: External controller and wall fixing kit.
Contractors choice.
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Ventilation Fan Controller Automatic Operation
As ventilation fan units. Surface mounted single fan controller. Humidity sensor located in floor void.
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Controlled Air-Inlet Vents
Automatically opening inlet vents, linked to humidity control and extract fan control. To achieve 0.5ach in floor void when open.
Contractors choice
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Draughtex Neoprene Strips
All timber ground floors: draught-proof and seal all timber floors to ensure no air-leaks. Draughtex neoprene strips or timber fillet/ mastic seal between skirting and floor. \ Skirtings and Wall junctions: Seal all junctions and repair any cracks in plaster to ensure no air-leaks. Standard decorators caulk between skirting and wall.
Draughtex \ www.draughtex.co.uk \ Draughtex Neoprene Strips
Revisions
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Admin - 2015-04-30 13:34:20
General error correction in intro/summary
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Admin - 2015-04-30 11:22:24
General formatting changes to parts list contact details, DWG file uploaded.
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Admin - 2015-04-22 14:04:33
Pdf detail file revised to most up to date edition.
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Admin - 2015-03-30 11:08:36
Preview image and pdf detail file updated.
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Admin - 2015-03-30 10:47:30
Drainage layer and optional flag paving added to parts list.
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Admin - 2015-03-26 13:58:35
Change to XPS on parts list
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Admin - 2015-03-26 12:50:19
General re-formatting. introduction revised and technical description updated. Parts list amended with suppliers links.
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Admin - 2015-03-24 10:22:40
Title amended.
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Admin - 2015-03-17 11:41:50
Title updated to match drawing. Introduction updated with additional data and target U-values. Technical description revised and updated with relevant BS data and Approved doc guidance. Parts list updated with codes, expanded with additional parts.
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Admin - 2015-03-04 16:57:39 [Displayed version]
First version
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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
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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.
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