I've tried several different weights of paper, and find that 120g/m2 is the best. 80g paper is likely to tear, and sharp corners are difficult with 170g. Matt paper is obviously essential.

You will need two copies of the drawing, but one can be the just black mortar lines (go back to the version you saved, and switch off the background brick colour). This second copy will be used as a template to cut out window and door openings, so can be printed on ordinary paper. It's quite useful to reverse the entire image for the second copy for reasons to be explained.

120g paper is obviously not strong enough by itself, and needs a card backing. The first stage is to cut a piece of card exactly the same size as one of the walls with window/door openings, and then glue or tack the black print to this (the inside of the wall if you've reversed the image before printing). You can then cut out the openings - this needs to be done very accurately. Remove the template if you wish, and glue the card to the back of your finished print, obviously making sure that the window and door openings line up. At this stage you won't have cut out the windows and doors on the finished print, so it can be a bit tricky to get this right. Apply the glue to the card, so that there is no glue on the backs of the windows and doors.

You can now finish the window/door openings. From the back, cut down the middle of the window, and accurately cut the top and bottom. You should now have two flaps which can be folded into the openings, so that the brickwork courses continue into the opening. The bottom of the opening will eventually be covered by the window sill, and the top cannot be seen.

Repeat the process with any other walls with windows, and add card reinforcement to the remaining walls. Cut out a floor, and fit everything together.

That's the hard bit done. It remains to assemble the building with the floor in place, and then add the detail - windows, doors, roof, guttering etc, before final weathering