How best to fill gap

Question

See pic...As you can see I am preping some woodwork ready for painting but while getting all the loose stuff off I find this gap where the wooden frame meets the wall.Whats the best way to fill this?Just with acrylic silicone OR use a `cement` filler and finish off with silicone?  It is approx a cm wide the gap.My fear would be if using a `cement` type filler then damp could cross the gap and eventually rot the wood.Despite looks the wood is currently in good condition.[IMG]

The Natural Philosopher · Accepted Answer

[IMG]> Acrylic decorator's caulk. - its NOT a silicone. Or an acrylic frame sealer suitable for exterior use. Both can take paint.

stuart noble · Answer

[IMG]>>I always use cement based for this type of exterior filling. A sand/cement mortar with a dash of pva

geraldthehamster · Answer

If it's that wide, I'd mortar it in. For a narrower gap I'd usebuilding silicone.CheersRichard

Geoff Pearson · Answer

[IMG]>>I use Trowel Mastic, for example, one made by Sika.  It is basically boiled linseed oil and sand mixed.  It sets in some months but moves and is waterproof.

Phil L · Answer

[IMG] not foundBut now that you're here, go ahead and search through the billions of photos, images and videos on Photobucket.no thanks

The Natural Philosopher · Answer

[IMG] works, but cracks if wood shrinkscar body filler works too :-)

stuart noble · Answer

[IMG]>>>>>>>>>>>That stuff has become too expensive to use in bulk

SS · Answer

[IMG]>> Page not foundLet my try the link again, sorry about that.....

fred · Answer

In article , Geoff Pearson  writesThat's def the trad way and is what a tradesmen would use on large scale sliding sash windows in Scotland.The more modern approach is foam for bulk plus frame sealant to seal. It's not a trivial gap so it would cost a fortune to do in gun sealant alone so I would use proper gun foam (far more controllable), cut back to a profile when cured then sealed with acrylic frame sealant.One thing, decorators' caulk is wholly unsuitable for this kind of job, it's for indoor use only.

Jonathan · Answer

I have some in the shed that claims to be good for inside and outside.Jonathan

fred · Answer

In article , Jonathan  writesThanks for the heads-up, historically that is quite unusual but I see Toolstation do some that is suitable for both interior and exterior use.That said I'd prefer to use something described as a sealant for this type of job as it generally implies more flexibility than a caulk.

How best to fill gap

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