Newspaper article The Journal (Newcastle, England)

Airing Issue of Excess Moisture; Good Ventilation Is Vital, Says House Doctor Peter Fall

Newspaper article The Journal (Newcastle, England)

Airing Issue of Excess Moisture; Good Ventilation Is Vital, Says House Doctor Peter Fall

Article excerpt

Byline: PETER FALL

IT is a fact of life with modern buildings that we need to take particular care over generating too much humidity because these homes are both well insulated and largely draught-free.

Older homes, on the other hand, are difficult to insulate to a high standard and in many cases the wind whistles freely through windows and doors blowing away excesses of moisture cooking and washing might generate. Even if they have been "done up", with double-glazing, the retained open fireplaces quickly spirit away moisture.

A big area of concern for modern homes is condensation in the roof space. Warm moist air rises up through the building and when it reaches the top floor ceiling the loft insulation holds the heat in, but the moisture will still move into the space above. Once the moisture is exposed to the cold underside of the sarking felt under the slates or tiles it can only mean one thing - condensation.

To avoid this we have to blow the moisture laden air away - by ventilating the roof space. When you have taken particular care to keep heat inside the house it seems balmy that you take extra measures to ventilate from the roof spaces what small amount of heat that squeezes through the insulation and makes the roof space even cooler. But it is important.

We ventilate roof spaces by a variety of ways, such as airbricks in end walls or a sarking felt under slates that "breathes" and lets moisture out. We can fit ventilation grills at the eaves and grills under the ridge tiles. But by far the most common method is to fit ventilation tiles at intervals across each slope.

These are used instead of slates or tiles and underneath they penetrate through the sarking felt.

There are perhaps 50 or more types. This proliferation can be their downfall or at least that is my reason for why a leaking shower couldn't be solved with a bit of sealant and re-grouting joints. …

Search by... Author
Show... All Results Primary Sources Peer-reviewed

Oops!

An unknown error has occurred. Please click the button below to reload the page. If the problem persists, please try again in a little while.