Vital Work on Soaked Insulation Boards at Hwyel Dda Health Trust Ceredigion

Insulation boards on the flat roof were saturated
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Damage extended over the whole roof area and posed a risk to the use of rooms below
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Closed cell insulation meant water could be effectively removed
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Large patches of damp showed where water was sitting
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Soaking insulation boards were a major problem not quoted for (not known about) in the overlay specification from this NHS Hwyel Dda Health Trust hospital. Replacing this full-tapered insulation system would have cost almost 15k, and the hospital had no other budget left to allocate - which could have scuppered the whole project.

A solution to help our NHS keep extremely important rooms in use was needed... and we found one.

We began by peeling back the old roofing membrane to expose the boards, before drilling multiple core holes into the insulation. We then used a 37 horse power hydroplane machine suction hose in all the core holes, laying the membrane back over the insulation & leaving the suction hose in place for 6 hours. 5 gallons came out in 49m2 - which is only viable if the insulation is closed cell.

The following day, board surfaces were vacuumed with the hydroclean normal hard floor wand for 5hrs. Moisture readings were 3%. The sun, which has been missing for 7 months, miraculously came out - literally cooking the boards to a surface temperature of 53C red on the laser thermometer, completely drying the insulation boards.

This enabled a new faced carrier membrane to be fitted, followed by the liquid membrane system. The carrier will temporarily be left uncoated to test for vapour blistering (from any missed moisture) before the liquid coating is applied, waterproofing the area jointlessly and seamlessly for decades to come.

Above Cost vs total removal
£5k vs £20k = £15k saving to client.

What now?

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