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Question DetailsAsked on 12/2/2015

concerned about old wood/termite damage under aluminum siding

house was built n 1956 and not sure how long the siding has been up probably 20-30 years. On bottom edges of siding the wood that sticks out looks bad. What would be the most cost effective way to take care of this? Would it be to take off old siding, check the old wood, remove or repair it and then put new siding?

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1 Answer


The wood should not stick out under the siding - that is why the siding is there, to protect the framing and house from water and insects. Not sure if you are talking exposed wall sill plate (bottom 2x on top of the foundation) or sheathing behind the metal siding.

Obviously, eliminating the insects is the first thing, if there is an active infestation. Pest Control is the Search the List category for that.

As to the wood damage - some siding would have to be removed to inspect for the extent of damage, working from bottom up - usually only a foot or two worth of removal is needed which is easy with horizontal lap siding, not so much with panel or vertical strip siding. Fairly rarely except in quite old buildings it is bad enough that replacement of the bottom sill plate and sometimes even some studs is necessary. In the other extreme, sometimes it looks bad but is not real deep into the wood and was just from one past infestation so just keeping preventative termite control in place is all you need, with maybe just one or two spots of locall replacement of wood. In the intermediate cases, removing the bottom siding and replacing or sealing the worst places (which affect structural integrity or provide an opening into the house for vermin), then soaking it with touch-up ground-contact treated wood preservative like Cupreanol (Cuprinol in the US) or such is the solution.

Sometimes, especially with vertical siding, it can be easier to assess and repair from the inside - especially if you have open unfinished high crawlspace or basement to work from.

To do the evaluation - Pest Control to look for and control the infestation if any, then probably a Foundation Repair contractor or General Contractor that does remedial framing repairs for wall damage repair would be your Search the List categories for the repair. Any pest control treatment should be coordinated with the repair contractor (if needed) so just before putting the siding back on the opened up areas can be treated with preventative pesticide (usually a powder/granule) as applicable, but any exterior preventative treatment should be held off on (for a short time) until the repairs are done to avoid exposing the workers to fresh pesticide.

Answered 4 years ago by LCD

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