read the manufacturers instructions... phenolic boards required at least 25mm clear cavity... there is nothing wrong with your 50mm insulation plus 50mm cavity. but there could well be everything wrong with the 100mm fulfill wrong insulation, this will cause future problems.
50mm or 100mm kingspan in cavity wall
- Thread starter ey143
- Start date
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What kind of problems?
As someone else has already said Damp and consequently loss of insulation performance.
Any damp that penetrates the otter leaf has a chance of tracking onto the inner leaf via the wrong type of insulation fitted as fulfill. Check with the manufacturers recommendation of the insulation before fitting. some insulations are designed for fulfill, others are designed for part-fill.
Any damp that penetrates the otter leaf has a chance of tracking onto the inner leaf via the wrong type of insulation fitted as fulfill. Check with the manufacturers recommendation of the insulation before fitting. some insulations are designed for fulfill, others are designed for part-fill.
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any moisture in the cavity is directed back to the outer leaf via cavity trays and dealt with by weep holes the wrong type of insulation can prevent this.
sorry, the insulation fitted wrongly can prevent this.... it's all in the design, suggest you consult a surveyor or architectural designer.
This is all for my understanding I'm sure my builder will do a fine job *cough cough*.
The use of cavity trays and weep holes surely require water to drop down that exact part of the section right? It's not like there's a hole going across the whole width of the cavity so does sufficient air get in to dry it out?
The use of cavity trays and weep holes surely require water to drop down that exact part of the section right? It's not like there's a hole going across the whole width of the cavity so does sufficient air get in to dry it out?
The cavity is not sealed at the top will vent into breathable part of roof. A good set of working drawings will help you to understand this detail. The amount of moisture into the cavity is minimal and weep hole and cavity trays can deal with this. (The concrete at footing level in the cavity is chamfers down to the external leaf below doc, which also directs any moisture away from the inner leaf) Only if there is a failure on the external skin or ageing spalled brickwork becoming porous does excess mousture in the cavity become a concern....Or a bad detailing, or incorrect installations!
Arr...... Predicted text!.... 'Doc' is meant to be DPC (damp proof course)!
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