Treading Softly - Environmentally considerate living in a rural english home and garden

Treading Softly

Flat Roof Insulation & Covering




This 30 year old flat roof was in reasonable condition but had been poorly insulated and the lounge and kitchen underneath were cold in winter, loosing us money and contributing a relevant percentage to our carbon footprint. Having debated and researched for years on how best to insulate the roof, Parity Eco Solutions were commissioned to provide an Energy Options Report for The Cottage, part of which recommended insulating the flat roof by removing the covering, filling with the insulation material and re-covering it .

For environmental reasons, Warmcel 100 was selected for the insulation material due to its outstanding environmental credentials, ease of application and cost. The local contractor who had previously done work on the roof 15 years earlier was chosen to do the work. The job was completed in September 2008 in just over 6 hours with a team of 6 men who were outstandingly hard-working, very polite and cleared up very well.

Apart from the insulation material, the original loose chippings covering the roof were re-used on our driveway and the original fibreglass insulation was re-used on top of the Warmcel 100 when we started to run short of Warmcel.

One tip for a Flat Roof insulation project like this using Warmcel 100 or Thermafleece. It is best to order more insulation material than anticipated for the job. Our under-estimate of the depth of the space between the joists meant being 5 insulation bags short (or just £50), which is insignificant in relation to the labour cost for the job. If we had over-ordered we could have easily sold or Freecycled the surplus.

 

Old cover comes off. Stone chips re-used on driveway Original insulation + redundant wasp nest
Old cover comes off. Stone chips re-used on driveway Original insulation + redundant wasp nest
Warmcell starts to be added between the joists Assessing the spread for the 44 Sq metres
Warmcel starts to be added between the joists Assessing the spread for the 44 Sq metres
The Warmcell being fluffed up A 50mm gap left below the joist
The Warmcel being fluffed up A 50mm gap left below the joist
Old insulation removed and Warmcell laid at bottom Each Warmcell bag is 8Kgs
Old insulation removed and Warmcel laid at bottom Each Warmcel bag is 8Kgs
Fluffing Laying Warmcell to a depth of 130mm
Fluffing Laying Warmcel to a depth of 130mm
50 mm gap above Warmcell Two thirds laid
50 mm gap above Warmcel Two thirds laid
Old fibreglass insulation laid on top of Warmcell Small Celotex sample added to one joist
Old fibreglass insulation laid on top of Warmcel Small Celotex sample added to one joist
All old insulation was laid on top of Warmcell When Warmcell runs out, pink covered <br>fibreglass insulation from main loft was used.
All old insulation was laid on top of Warmcel When Warmcel runs out, pink coloured
fibreglass insulation from main loft was used.
Layer 1 Layer 2
Layer 1 Layer 2
Layer 3 - Top 4 Vehicles, 6 men, 6.5 hours to complete
Layer 3 - Top 4 Vehicles, 6 men, 6.5 hours to complete
First rain test Slight pooling over utility area
First rain test Slight pooling over utility area