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Backer rod ensures that whatever sealant is used it is bonded on only two sides.
This allows the sealant to cope with any change in the joint width,
normally due to different coefficients of thermal expansion.Any damp material, (plaster, building rubble, etc., between the brick wall and door frame), needs to be removed. IS the door frame only anchored by a couple of screws/wedges?
Yep, just some packing and a couple of screw fixings.
You may consider filling the bulk of the void with anything you have to hand, (end of a bag of plaster etc.)
First thought was expanding foam but would look in to it to ensure it won't draw moisture from the brick out towards the wood.
Soudal Fix All High Tack Adhesive & Sealant, (Toolstation 84704),
has much better unprimed adhesion than any silicone sealant, I have used.Yep this stuff is great, have used it around the place.
A 30mm wide joint will need a bead of sealant at least 15mm deep to give a longlife waterproof seal.
Just measured it again, it's 15mm at the worst, but will still need a big old dollop of sealer.
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Howard
Has poor unprimed adhesion to most commonly encountered building substrates.
Backer rod ensures that whatever sealant is used it is bonded on only two sides.
This allows the sealant to cope with any change in the joint width,
normally due to different coefficients of thermal expansion.
Any damp material, (plaster, building rubble, etc., between the brick wall and door frame), needs to be removed. IS the door frame only anchored by a couple of screws/wedges?
You may consider filling the bulk of the void with anything you have to hand, (end of a bag of plaster etc.)
Soudal Fix All High Tack Adhesive & Sealant, (Toolstation 84704),
has much better unprimed adhesion than any silicone sealant, I have used.
A 30mm wide joint will need a bead of sealant at least 15mm deep to give a longlife waterproof seal.