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angle iron's fine, catnic might actually be your best bet for ease of intallation though, providing you get one the right size. Remember there are other manufacuters of these type of lintel apart from catnic. You may also be able to use a type of lintel that catnic use designed for timber frame...

this is a worrying problem, as the guy said it could be a poorly packed support or insufficient bearing or insufficient selection of beam. Get a new builder in to expose and rectify and phone a lawyer.

it may be that water is entering the cavity externally and is bridging across at the window head due to a lack of or failing dpc apron. the render being blown could either be a cause or a symtom. head up into the loft and have a poke about directly above the offending window, if there is nothing...

double check that the upstand in the middle of the lintel is less that your cavity size if you're using a catnic or it won't fit. unless the outside wall is facing brick i wouldn't bother using a catnic and just use two type c concrete lintels. if you need further explanation give me a shout.

do you mean the starter system or the idividual ties? i use the system(rails), not necessarily staifix, for extensions and the individual ties for blocking up old windows and things where you struggle to fit a full rail in.

they've used a wall starter which is like a rail which is drilled, plugged and screwed into the existing masonry and has ties supplied which slide into the rail. This technically isn't a movement joint, but becuase it is a new addition to the building with a new foundation etc. it is the most...

to get rid of the unsightly surface mould, buy some Miltons sterilising fluid, the stuff they used to use to clean babies bottles back in the day. Get an old spray bottle(the kind used for domestic cleaning), fill about an 8th of this with the miltons, about a 16th of bleach and about a 16th of...

min 200mm deep concrete min 150mm scarcement each side of outside edge of walls(if you know what i mean) min 200mm frost cover (200mm from top of concrete to existing ground level) i would put re-inforcement in, you would probably get away without it, but it's cheap and doesn't take long so...