Here is another question asked by a member of the public relating totreating timber trusses. We hope that it and the answer which we include below are useful.

I am converting a cow shed into a house and I have two pitch pine trusses that I am retaining.

They seem to be in an OK condition but have been exposed to the elements over the last 8 months.  A roof is now on and things will slowly start to dry out.

We are looking to either sand or grit blast the trusses as they need cleaning up; in some areas the water has caused a green residue to form.

Please can you advise if I should sand / grit blast first or treat and then sand etc.  Please also advise on the best treatment bearing in mind that it is in situ; someone suggested a paste.

Here's our answer:

Do all the cleaning of the trusses before you treat. For maximum penetration of the timber preservative use our deep kill Timber Paste

If you have a question, that you'd like us to answer, please email John Oxley: john@constructionchemicals.co.uk

Construction Chemaicals offer a free 'Ask John' service and he will be happy to answer any questions you have.