DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Bricks, Masonry and Concrete > laying concrete blocks




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Old 07-14-2012, 12:47 PM  
sisyphus
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Default laying concrete blocks

Hello all, I would like to learn how to lay concrete blocks but have never done this. I've watch a few videos on this, but I can't figure out how they keep the joint spacing uniform. does anyone have any tips for a newbie? thanks.



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Old 07-14-2012, 05:17 PM  
stuart45
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Do you mean the bed or perp joints, or both?



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Old 07-15-2012, 09:04 PM  
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I'm not famuliar with the term perp joint. I'm refering to the spacing between the blocks on all sides. how are the spacings kept uniformed?

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Old 07-16-2012, 08:07 AM  
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In the USA brick and block spacing rules can be used, but here we use a piece of 2x1 batten with the course marks on it. For example if the height of the block is 8 5/8 inches with a 3/8 inch bed joint you mark the batten every 9 inches and when building the corners check the heights with this. If you need to lose an inch overall in height you take a bit off each course so the marks are a bit lower, or increase them if you need to gain an inch.
With the perp or head joints (vertical joints) you set out the first course, and make them smaller or bigger to suit the run. Then next course lay the block or brick so it's halfway over the one below.
For high quality brickwork a pencil mark is made about every 4th brick using a level to keep them plumb.

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Old 07-16-2012, 09:01 AM  
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thanks for the reply. know anything about installing concrete steps? specifically about whether they need to be attached to the house or not?

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Old 07-16-2012, 03:58 PM  
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Pre-formed concrete steps do not have to be attached to the house.

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Old 07-17-2012, 02:36 PM  
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Steps don't have to be attached to the house. Here's a brick set that have a gap as they would bridge the damp proof course if touching the wall.
phphlfiihpm.jpg

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Old 07-18-2012, 06:53 PM  
sisyphus
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Quote:
Originally Posted by stuart45 View Post
Steps don't have to be attached to the house. Here's a brick set that have a gap as they would bridge the damp proof course if touching the wall.
Attachment 4112
that might be doable for me. I'm assuming that the bricks are sitting on a concrete slab? and it look's like that's attached to the house? and what would you do to conceal that gap?
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Old 07-18-2012, 11:16 PM  
nealtw
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Never herd of (damp proof coarse) before, but I don't work on brick or block so I shouldn't be surprized. It makes alot of sence to keep thing away and allow things to have air. Is this used in North America?

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Old 07-19-2012, 05:22 AM  
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Quote:
Originally Posted by sisyphus View Post
that might be doable for me. I'm assuming that the bricks are sitting on a concrete slab? and it look's like that's attached to the house? and what would you do to conceal that gap?
They are on a concrete slab. The foundation depth depends on ground conditions and your climate. The slab just butts up against the wall. The exterior
wall will have stucco down to the batten, which is just above the damp proof course.
nealtw,
You may know damp proof course by a different name. Nowadays it's a plastic membrane that comes in a roll the width of the brickwork which is laid on top of the walls at least 6 inches above the ground to prevent rising damp.
Years ago 2 courses of slate were used.


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