The Property Care Association and Graham Colman of Remedial technical services have some interesting research in progress. This is a study of the vapour pressure differentials inside randomly chosen homes around the UK, compared to external measurements. Condensation problems are common and seem to be growing. Those of us involved in condensation and mould control […]
Internal vertical DPM’s used in existing buildings to keep out damp; ventilate behind or not?
08 Dec 10 by
Using some form of vertical barrier to hide damp has been around for a long time. Many walls in old schools and churches still retain the dado rails and match boarded linings at their base. Recently, dimpled profile membranes, made by Newton, Delta, Oldroyd and Platon have really expanded into this market. The method involves […]
Electrical Moisture meters in building surveys; unnecessary? or Essential?
05 Dec 10 by
Every surveyor I’ve ever met owns an electrical moisture meter. It makes me think; what did surveyors do before these arrived? The short answer is that they used their eyes. Were their survey reports wrong as a result? I doubt it. So what is the point of these expensive and maligned gadgets? To answer this […]
Positive Input Ventilation as a condensation control: Case study in York: 2…the data:
25 Nov 10 by
As I was saying in my last article on this subject, anecdotal evidence for the benefits of PIV’s is good. When I returned to the bungalow in York, last Monday morning it was business as usual; “This is a different house” exclaimed my client “The stuffy feel has gone and you can just tell it’s […]
A word on Relative Humidity……(in houses).
21 Nov 10 by
Later this week I will blog the results of the data logging I’m completing at York See this Article I though it would be useful to recap some general information on environmental measurement, as it relates to condensation diagnosis and control; for those who may not deal with these issues in such detail. Humidity can […]