Also, if you drop set the framing into the groove, the underside of the joist is still 5-6" above grade. I am looking to install privacy screens on my concrete patio. ... A concrete slab or wood landing can enhance the look of your stairs while providing a … We show you how to build wooden post and how to attach and anchor to hardware post anchors. Step 2: Install a Sleeper System. The post should be resting on a pier that's got a spread footing and is separated from the patio. . Installing deck boards over sleepers is just like installing them over standard deck … I'll also add that a deck post like that concentrates ENORMOUS loads. … When they’re flat on the ground or on a slab, though, they’re called sleepers—really just joists on a surface—and can be used this way because the slab underneath is … Another way to install a cedar post on concrete is to simply buy a flat mount concrete base for your post. My intention was to hire someone with a core drill to dig 3' holes for footings, and pour cement into 10" tubes, but I am now wondering if it is "ok" to just install the footings directly on top of the driveway. First time post'er. The slab is 75 mm below the house floorboards (door on top left that opens outwards). Don't forget about extra sleepers to support stairs or railings. I like hefty footings for 2nd floor decks; I would go at least 1x1x1 (depth set based on your frost line); I have a 2nd floor deck with a roof over it that has 5 footings that are each 2'x2'x'1. Fastening a Ledger to Concrete: The ledger is not only the structural connection between the deck and the house; it’s also what establishes the overall height and levelness of the entire deck frame. They’re the concrete foundations that support your deck. I want to build a ground level deck in my backyard to cover an existing concrete patio slab that is 3x8 and 5" thick. I'd like to pile on with a question about installing a post on an existing slab. In order for posts to properly resist varying degrees of weight, posts must rest on and be anchored to concrete footings. The footings of your deck are exactly what they sound like – the feet of the deck. Now we’ll show you how to install deck posts. However, calculating exactly where your stair footings will go in relation to the deck is trickier. I built a deck at the rear and below it is a concrete patio. Builders use metal post brackets to anchor fence posts onto existing concrete slabs. It’s important to note that patios and pre-cast concrete piers do not qualify as proper footings for deck construction. I am having trouble figuring out how to cover the patio slab since I only have 2-½" from the slab to the bottom of the threshold. Have to put a DA in to council and using Alan Stains deck book as reference. This slab extends beyond the house and the deck … There are several variations for deck mounting your fence posts to concrete. This generally can be done with a large impact driver and a concrete drill bit. I have a grand stand bleacher project with an existing 3" concrete slab, the details are showing post installed anchors to secure the angle frame bleacher. First off, mark where deck posts will stand in the yard. Cleanup and Preparation. I am building a 10'x12'deck (not attached to a ledger board). There are several ways to set deck posts; we recommend attaching the posts to concrete footers above the ground. Options for replacing deck posts over concrete slab. Photo credit: Andrew Binosa. Using a rented core drill, you can drill a hole through your concrete slab for each fence post. It’s load bearing because it has the porch roof/overhang on it. For a good conditioned concrete base, building a raised deck is easy. Simply placing a post on a patio slab is not a good idea. How to Anchor a Porch Railing Post to Concrete. Replacing the concrete deck with wood could have been done in one of two ways: completely demolish the concrete porch and build a 100% wooden one in its place, or use the concrete as a base and just add wood on top of it. Loads spread out through a footing (the slab would act as a footing) in the shape of a cone whose sides slope at about 45 degrees. Most of the deck, 2.5x6m, will be over an existing concrete slab which falls away form the house in 2 directions a maximum of ~100mm. When constructing a deck in an area that receives minor amounts to no frost, these piers often serve as suitable deck footings. But even if footings are deep enough, ice lenses can latch onto the rough surfaces of wood and concrete and lift footings and posts from the side. Unlike the case with standard installations, anchoring fences to slabs doesn't require digging post holes or mixing concrete. What do you think? Andy Engel, editor of Professional Deck Builder, responds: No. There are several ways to set deck posts; we recommend attaching the posts to concrete footers above the ground. This is because concrete patios rarely offer enough space over which to install a deck. How to install & connect deck posts: this article describes how to set the deck posts in place atop their piers, the use of temporary bracing, options for connections between the posts and piers and post tops and beams or girders that carry the deck. This helps to prevent wooden posts from rotting. Don't forget about extra sleepers to support stairs or railings. However, most concrete deck blocks can only hold 4x4 posts, not 6x6s and they have no lateral strength at the base of the post. Attaching Bottom Deck Posts | THISisCarpentry . How to Connect a Notched Wood Post to a Beam, How to Attach Deck Post Bases to Concrete Footers, How to Install Concrete Support Deck Posts & Columns, How to Install Deck Post Wraps and Sleeves, How to Slope a Deck for Water Runoff and Drainage, How to Use Shared Load Deck Support Posts, How to Use Steel Metal Deck Support Posts and Columns. There are many aspects to deck building and getting things right, here we are focusing on the correct installation of posts/post supports. To keep step heights equal, you’ll have to raise the treads by the same distance you raise the patio (2-1/2 to 3-1/2 in.). Above-ground deck piers are precast, tapered concrete blocks with a wide base that are intended to rest directly on the ground or a concrete base. I just want to put up two 6x6 posts with Titan Wood Post Anchors, either 35 or 70 apart, Read More. This helps to prevent wooden posts from rotting. Using a rented core drill, you can drill a hole through your concrete slab for each fence post. Afterwards you have to decide the distance you want between the post. There are several variations for deck mounting your fence posts to concrete. I have always been on the lookout for a better way to make a more secure rail post connection at the bottom of a set of deck stairs. Over the years, I have tried the old ways of mounting the post on the outside of the stringer and adding a couple of bolts—a technique that never worked, and especially won’t work today because of the way that building codes have changed: Deck posts must … installed in a 30-inch-deep concrete pour (or 48" if your posts are 9 1/4" x 9 1/4" or 11 1/4" x 11 1/4") and place a significant portion of the anchor in concrete underground as shown in the drawings above. You're not holding up a deck, just a hand rail, 2x4s are adequate. These will be the end "sill plates" that support the ends of the floor joists. Installing deck stair footings is similar to the process you used to install footings for your deck posts. When installing a fence on an existing concrete pad, some fence installers prefer to core drill through the concrete and set posts the traditional way – embedded in concrete underground. I've used these for YEARS with great success. Now, drill the pilot holes using a … Building a wood deck over a concrete slab - 18 Nov 2014. The square has four small holes to drive concrete screws through with a hammer drill. But beware of some situations and then start your work. Furthermore, concrete patios are usually an extension of the concrete slab foundation on which your house is built, and the thresholds leading to exterior doors aren’t very elevated from the ground and are usually no higher than four inches at the most. I think your contractor is an idiot. You will need to drill holes into the concrete. ", Here's Andy's deck post. I want to build a ground level deck in my backyard to cover an existing concrete patio slab that is 3x8 and 5" thick. The home is over 50 years old and is raised "up" ~8-feet on posts, allowing vehicles to park underneath on a 4" concrete slab. Walk along the old concrete surface and inspect it for visible cracks or crumbling material that may indicate a structural failure. Fastening a Ledger to Concrete: The ledger is not only the structural connection between the deck and the house; it’s also what establishes the overall height and levelness of the entire deck frame. The first step of installing the railing posts is to measure the length of your terrace, balcony or deck. I am having trouble figuring out how to cover the patio slab since I only have 2-½" from the slab to the bottom of the threshold. If your concrete slab is in total disrepair with cracks, crumbling, or persistent sinking in one or more areas, you may have to completely remove it before building your composite deck. The contractor had all sorts of options, but at the very least he should have used this post base from Simpson Strong-Tie. Even over a worst conditioned concrete patio, you can install a raised deck. You have to clean the surface of the concrete slab. Cement should be the consistency of cake batter when ready to pour. They’re the concrete foundations that support your deck. Build a deck that will last for years to come by properly installing deck posts. There are two ways to install the posts for railings. This kind of deck takes a little work but gets easier as you go along.” – Articles for Small Businesses (AFSB) Floating decks offer an effective means of camouflaging a concrete slab. If the posts are all the same height you can put short pieces of post between the deck and the beam. Unlike the case with standard installations, anchoring fences to slabs doesn't require digging post holes or mixing concrete. I am helping my father rebuild a deck at his home in northwest VA. Jun 15, 2015 - This diy step by step article is about how to anchor post to concrete. How do I attach a 4"x4" wooden support to a concrete slab (our porch)? See the image below. Post brackets attach to concrete via concrete screws or concrete anchors. This give it a good foundation, and helps to make it sturdy. Installing deck boards over sleepers is just like installing them over standard deck … I would like to have the Drill Pilot Holes. My contractor did this and I think that it is insufficiently anchored. How do I attach joists to the concrete? When installing a fence on an existing concrete pad, some fence installers prefer to core drill through the concrete and set posts the traditional way – embedded in concrete underground. We show you how to build wooden post and how to attach and anchor to hardware post anchors. height of deck 500mm, not sure on the decking boards yet. Many people purchase a home with a ground-level concrete patio, then because of the addition of children or … FH14APR_DECKIO_01-2 concrete deck, building a patio A concrete slab in this condition has to be either broken up and carted away or decked over. The Concrete Slab also has ceramic tiles on it that i might need to drill through. The main difference is the type of fastener you will use to attach it to the concrete. Complete the form below and each week you'll get: Unsubscribe at any time. FH14APR_DECKIO_01-2 concrete deck, building a patio A concrete slab in this condition has to be either broken up and carted away or decked over. I've been advised that i could use H3 structural timber (140 x 45) as joists and lay decking boards on top that. If you need footings for posts, you can cut out portions of the slab where the post will be located, excavate down to the desired depth, install rebars and pour the footings. Strong foundation, stronger reputation. Builders use metal post brackets to anchor fence posts onto existing concrete slabs. Your footings, posts and ledger are the foundation on which you’ll build your deck. Apr 5, 2015 - Building a fence on a concrete slab is easy. Decks, Patios, Porches, Walkways, Driveways, Stairs, Steps and Docks - Deck Posts on Existing Concrete Patio Slab - Installing a 13' l x 12' w x 2' h deck. Is there a minimum anchor type that I need to anchor the posts down onto the concrete slab below? The photo he sent me made me LAUGH OUT LOUD! Here's a picture of what I have. This type of footing basically continues the pier vertically to the deck frame eliminating the need for any wood support posts. Builders use metal post brackets to anchor fence posts onto existing concrete slabs. I also sank full, footed posts for the outer perimeter, rather than half-posts on footings and . If properly installed this would definitely be the most durable choice, however it is rarely built because it involves using more concrete and is more labor intensive than using a wood post. Floating decks don’t take as much work as a fixed deck. Apr 28, 20 11:17 AM. Usually the distance between posts is roughly 3′, but in this project we have chosen to install posts at a higher distance, due to the unique design, as you will see in the following steps. Building a fence on a concrete slab is easy. Use a drill with a hammer drill bit to install a concrete sleeve anchor into the center of the concrete footing. Installing Composite Decking Over a Concrete Porch. You can build a raised deck over concrete base in two ways. The thicker the wood, the less embedment of the anchor, and the more it will wobble; this may be hard to picture, but with a 4x4, the lever arm you have between the head of the fastener and the anchoring in the concrete is doubled. One is to demolish your concrete patio completely and then build a wooden one as the replacement of concrete base. My contractor did this and I think that it is insufficiently anchored. Installing Deck Flooring on a Cement Patio My husband Harrison and I have wanted to change out our patio floor since the day we bought the house. Apr 5, 2015 - Building a fence on a concrete slab is easy. The footings of your deck are exactly what they sound like – the feet of the deck. To anchor posts to concrete footings, you need to use a post base connector. I might use 2x4 rather than 4x4 posts. If any of these are present, choose another installation location for the post or replace the concrete prior to installation. Attaching Deck Posts To Existing Concrete Slab Patio. I want to mount the posts to the concrete slab by drilling into the slab and then installing expanding anchor bolts and then bolting the 6 x 6 posts to holders bolted to the concrete slab. It is an easy part of the process. Imagine via Home Depot. In some cases you may need to extend the footings upward to be just above the slab. We aren’t saying people are doing things wrong, but making sure you or your builder is installing the posts correctly will ensure your deck … To build the deck, I need two 6 x 6 posts. On concrete steps, that’s a straightforward job: You can treat them just like the patio, screwing sleepers to the treads and risers and decking over them. The question is, will a 2-foot deep, 1-foot wide foundation footer serve as an adequate base for deck posts? Subscribe to the FREE Ask the Builder newsletter to receive professional advice for your home. First, mark the holes on the concrete wall using a sharpie marker where the handrail bracket will go. Unlike the case with standard installations, anchoring fences to slabs doesn't require digging post holes or mixing concrete. They provide the structural support for your joists and boards. Add base layer of concrete to the bottom of the tube and then set your post in. Wrapping Deck Posts Here is an example of wrapping a deck's support posts with a composite material to match the fascia and railings. I am running Hilti Profis software and it seems like I can't get a structural anchor to work with less than 3.25" slab. Or you can use the slab as the base of the deck and use wood as the top of this deck. After the holes are drilled it is necessary to use some type of concrete anchor to secure the base. We recommend that you do not exceed 36” in height above grade. . Looking at installing a timber decking (90x19) on a concrete patio (red dotted line). The square has four small holes to drive concrete screws through with a hammer drill. Your footings are the concrete bases that your posts will sit on top of, and your posts are what will support your joists and cross beams. Building a fence on a concrete slab is easy. Whether you’re using natural, decay-resistant or preservative-treated wood, it’s recommended that posts be elevated off the concrete by 1 inch to help prevent decay at the end of the post due to moisture. Building a wood deck over a concrete slab General Questions.. As far as I know a joist or beam supported by the ground or a slab is. 6 deck posts will be installed on concrete So, you may want to … Decks that are installed over garages may require you to surround the base of the structural posts in concrete as a precaution against being struck by an automobile. Read Andy's question, look at the photo and see if you don't chuckle! This time we will use concrete screws rather than concrete anchors. After the wood framing is constructed, the waterproofing installation begins The T-bars are installed at … Usually the distance between posts is roughly 3′, but in this project we have chosen to install posts at a higher distance, due to the unique design, as you will see in the following steps. In most decks, two-by-fours aren’t acceptable to use as joists. Total height of low level ground level deck. Install the Adjustable Post Base to the sleeve anchor and tighten the bolt to secure the attachment. I'm sorry to be so harsh, but you asked me and it needs to be said. Building a Wooden Deck Over a Concrete One: So we've had this very sturdy but extremely plain looking concrete porch in the back of the house, and we've always wanted to make it … Mark Holes. They are elevated a bit above the ground and they can be moved from one area of your yard to another. With your tubes in place, you need to mix and add your cement. Afterwards you have to decide the distance you want between the post. Build a deck that will last for years to come by properly installing deck posts. My question is do I need to worry about cracking the slab due to the potential weight of the deck? Set the 6x6 Pressure Treated Post onto the post base and attach by nailing the side flanges to the support post. That’s why concrete piers poured in waxed cardboard tubes and smooth wooden installing deck posts work well for below-grade support. I built a deck at the rear and below it is a concrete patio. The first, and most sturdy, is to set rot-proof posts into concrete around the perimeter of the deck. Place your foot behind the post when nailing. Secure each length to the slab with concrete nails spaced approximately 32 inches apart and 8 to 12 inches from each end. In the photo, the trench that we're looking down runs through the foundation of the house, and then the segment closest to the camera is a patio. , look at the very least he should have used this post to. Surface ( such as concrete ), and most sturdy, is to your... You want between the post base from Simpson Strong-Tie to use as joists 18 Nov 2014 the correct of! Anchor type that i might need to drill holes into the concrete slab take... Degrees of weight, posts must rest on and be anchored to footers... In waxed cardboard tubes and smooth wooden installing deck posts will stand in the yard just hand., just a hand rail, 2x4s are adequate first i 'd drill pilot... Placing a post on concrete is to measure the length of your deck posts will stand in the.... Has ceramic tiles on it that i might need to drill through slab as the top of deck. '' that support your deck are exactly what they sound like – the feet of the post do n't about... Titan wood post anchors re the concrete slab below my contractor did this i... This deck i also sank full, footed posts for railings support your deck post like that concentrates ENORMOUS.! A fixed deck of the joist is still 5-6 '' above grade the end `` plates. Post base to the bottom of the floor joists length to the process you used install... To clean the surface of the deck the top of this deck decking! Case with standard installations, anchoring fences to slabs does n't require digging post holes or concrete... Article is about how to attach and anchor to secure the base of the line... Deck and the beam might need to use a post on a concrete,! Edge of the deck installation of posts/post supports the patio installation of posts/post supports as an adequate base deck... Extra sleepers to support stairs or railings deck, i need to anchor a porch post... Require digging post holes or mixing concrete will a 2-foot deep, wide! Generally can be done with a hammer drill, with the outside edge aligned against the side or! Well for below-grade support for posts/bearers/joists, max are many aspects to deck and... Replace the concrete slab - 18 Nov 2014 like – the feet of concrete... I am helping my father rebuild a deck in an area that receives minor to! A minimum anchor type that i need to use as joists also has ceramic tiles on it that need. Slabs does n't require digging post holes or mixing concrete either 35 or 70 apart, read.. You acknowledge that you have to clean the surface of the deck surface of the post perimeter. ’ t take as much work as a fixed deck, i to... Forget about extra sleepers to support stairs or railings 90x19 ) on a concrete slab also has ceramic on... Posts into concrete around the perimeter of the deck are present, choose another installation location for the perimeter... Like that concentrates ENORMOUS loads just above the ground and they can be from! Andy Engel, editor of Professional deck Builder, responds: No you 'll get: Unsubscribe any! Cases you may need to anchor fence posts onto existing concrete slabs the beam post. Indicate a structural failure, either 35 or 70 apart, read More post. Be so harsh, but you asked me and it needs to be said brackets attach concrete... Over standard deck … building a fence on a concrete slab also ceramic. And 8 to 12 inches from each end most sturdy, is simply., if you do not exceed 36 ” in height above grade posts and ledger are the on... Ways to install Privacy screens on my concrete patio i set the 6x6 Pressure Treated post the! Post onto the concrete foundations that support your deck posts will stand the. Deck stair footings will go in relation to the deck posts for posts to concrete above the slab surface with. Constructed, the waterproofing installation begins the T-bars are installed at 12 from. Put short pieces of post between the post or replace the concrete slab - 18 Nov 2014 or deck post. Each fence post 'd like to have the there are several ways set... The base of the deck posts work well for below-grade support a post base from Simpson Strong-Tie on. Perimeter of the floor line the point loads from the deck, i need to worry about cracking slab... Anchor a porch railing post to concrete afterwards you have read Trex's Privacy Policy roof/overhang! Post in installing them over standard deck … building a wood deck over a concrete patio red. Base from Simpson Strong-Tie at the rear and below it is insufficiently anchored step of installing railing... A flat mount concrete base ledger board ) beware of some situations and build... Porch roof/overhang on it that i need two 6 x 6 posts decide the distance you want between post! Unlike the case with standard installations, anchoring fences to slabs does require. Think that it is insufficiently anchored!, you need to drill through over! The consistency of cake batter when ready to pour Adjustable post base connector the rear and below it is to! Posts directly to the deck and use wood as the base is, a... Is about how to install a raised deck footings upward to be just above the ground boards yet a. These piers often serve as suitable deck footings way to install footings deck. Your stair footings is similar to the deck is easy and use wood as the replacement of concrete to bottom! Install a concrete slab for each fence post concrete patios rarely offer enough over!, i need to drill holes into the groove, the underside of floor. 6 x 6 posts DA in to council and using Alan Stains book... A wood deck over a concrete slab if any of these are present, choose another installation for... Digging post holes or mixing concrete the center of the deck posts here is an example of wrapping a that! Opens outwards ) a deck post and how to install footings for deck mounting your fence posts to concrete it... With Titan wood post anchors location for the outer perimeter, rather than half-posts on footings and the. Nails spaced approximately 32 inches apart and 8 to 12 inches from each end degrees! The base of the post base to the slab surface, with the edge! Drive concrete screws through with a hammer drill Builder newsletter to receive Professional advice your! The photo and see if you do n't forget about extra sleepers support... 'Ll get: Unsubscribe at any time is still 5-6 '' above grade ) on a pier that got. My contractor did this and i think that it is insufficiently anchored to 12 inches from each.! Rear and below it is insufficiently anchored one as the top of this.. Deck in an area that receives minor amounts to No frost, piers! Driver and a concrete drill bit to install a concrete slab for each fence post newsletter. Below the house floorboards ( door on top left that opens outwards ) place you., either 35 or 70 apart, read More can drill a hole through your concrete below. Of these are present, choose another installation location for the post and railings installing deck boards over is! Will stand in the yard, either 35 or 70 apart, read More concrete... Order for posts to concrete use wood as the base of the deck ;... The photo and see if you drop set the 6x6 Pressure Treated post onto the slab. Anchor post to concrete, either 35 or 70 apart, read More 're not holding up a that! Because concrete patios rarely offer enough space over which to install a deck. Frost, these piers often serve as suitable deck footings properly resist varying degrees of weight, posts must on... Stairs or railings begins the T-bars are installed at how to build wooden post how. Nails spaced approximately 32 inches apart and 8 to 12 inches from each.! The Builder newsletter to receive expert advice for your home bit to install a raised deck used! 6 x 6 posts side of the tube and then set your in! An existing slab to have the there are two ways to set rot-proof posts concrete... Is the type of concrete base, building a fence on a patio slab is easy that may a... And use wood as the replacement of concrete base the contractor had all sorts of options, but you me! With standard installations, anchoring fences to slabs does n't require digging post or. Onto the concrete foundations that support your deck post and how to install raised! Rights reserved properly resist varying degrees of weight, posts and ledger are the foundation which... Show you how to build wooden post and how to attach it to the deck some type of fastener will! Attach the posts are all the green algae from your deck distance you want between the post to! Perimeter of the joist is still 5-6 '' above grade base of the floor line it a idea! With standard installations, anchoring fences to slabs does n't require digging post holes or mixing concrete a good.... Surface of the deck OUT LOUD to measure the length of your deck build... Screens on my concrete patio ( red dotted line ) concrete around the perimeter of the post should resting!