Good evening all,

Does anyone have any experience of the above? We’ve recently moved, and are suffering the first signs of mould now the weather is degrading.

A loft based fan system has been suggested – a Drimaster unit. Has anyone tried one, and does it really keep the dreaded black spot at bay?

Ta.

your loft simply needs more ventilation. Find out if any airways are blocked due to insulation etc. If not consider fitting additional soffit vents.

only other solution is reduce the escape of warm air through loft hatch through good draught sealing

What about other measures in the house?
Is this an older house with newer double glazing fitted? Even so, there should be enough ventilation without paying for something like that. Also – how are you actually using the house? A friend who works in social housing sees very good houses that can be used very badly if the occupant doesn’t understand what is needed to maintain healthy airflow.

Have a look at what you as a family do there and see what might be changed to reduce moisture and improve airflow first.

Old house, thick granite walls, windows and doors open when possible but the outdoors humidity is high. We’ve had this problem in the previous house, was wondering if the loft-space pumped positive pressure systems really do reduce the condensation problem enough to keep the mould at bay.

Length of soil pipe through ceiling at top of stairs, through roof, and caped with a cowl, passive stack ventilation, nice grill on ceiling upstairs, no need for a fan etc.

Jobbies.

The house might just need living in for a while to help dry it out.

From all accounts I’ve heard the positive input ventilation works great but it can be a little cold, some units have a small pre heater which helps this a bit.

I’ve spoke to a few people that have had them fire in damp houses and they highly rate them