Roof timber, white powder?

[chappers]

nearly all builders merchants will sell the round soffit vents you won't have to comply anyway but the requirements for a new build would be 25mm continuous vent allong the whole soffit or equivilant.
Works out at 1 in every gap between rafters roughly. but as you are only trying to ventilate your roof space and not a void behind insulation I would remove the bricks as you suggested probably in every other gap and fit a vent to those gaps at the soffit

 

[barrata]

Thanks everyone.

I'll get some soffit vents and remove the bricks and then get roof vents.

andy

 

[psollich]

Sorry to be coming back to such an old post. I've also recently found a white powder on beams in my attic, mainly in slight cracks in the wood and on joins (see pictures). It is very soft, dusts off easily, and only affects old beams (from ~1930 I guess) not new ones (had an extension built a couple of years back). The timber feels bone dry.

Any diagnoses as to what this could be, whether I need to worry about it, and if yes how best to get rid of the stuff?

Many thanks in advance. Apologies if I've missed a previous answer which already addresses this question.

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• psollich
• 20 Jul 2009
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• psollich
• 20 Jul 2009
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• psollich
• 20 Jul 2009
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• psollich
• 20 Jul 2009
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• psollich
• 20 Jul 2009
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[Chainsawcharlie]

The white growths is dry rot,very common but less serious.Sometime it can be stopped by drying out the timber with good ventilation.See this

GARBAGE, That is NOT dry rot

 

[Old Salt]

I shouldn’t think he’s bothered he posted that in 2004!

 

[big-all]

aaahhh yes nearly 20 years on i am sure things have moved on indeed i am now possibly senile rather than informed

 

[Chainsawcharlie]

I shouldn’t think he’s bothered he posted that in 2004!

Maybe, but to be honest I didn't post that comment directed at Masona but merely to let anyone else reading the comment, in case they were worried after reading Masona's reply