supporting a deck on existing patio

DIY Steps for Building a Deck Over a Patio Slab: The Low Down.

If your new deck will extend beyond the existing patio, lay out the pier blocks as needed. Bridge from the concrete slab to the first pier block with a pressure-treated joist board of standard width—the joist extension board. Make sure the adjacent ripped joist is level.【Get Price】

Wood decking over existing concrete slab patio | DIYnot Forums

1. I have a large area to deck (700 sq. ft.). My current plan has approx. 250 brick supports with 2x4 joists at 18" spacing and bricks every 30" along each joist. So that would be a lot of cutting, drilling bolting. 2. Also, would still have wood to patio slab contact, which I am hoping to avoid. Cheers, Andy【Get Price】

Decking - can I lay over existing patio? — MoneySavingExpert.

How are you supporting the decking? "Floating" on the patio itself or with its own legs going into ground properly? If the latter, then consider a membrane to pin over the patio to suppress weed growth. Make sure there aren't any drain covers under there.【Get Price】

How Do I Cover an Old Concrete Patio? | All Pro Decks and Patios

An existing concrete patio will make your deck installation much easier and faster, and you can install your deck directly onto the concrete. You will want to account for water drainage and material expansion/contraction, so it is best to place boards called ‘sleepers’ underneath the deck.【Get Price】

Decking on my existing patio | DIYnot Forums

I did a small-ish deck outside the back of my house by screwing deck boards laid flat directly to the patio flags using concrete screws, to form a supporting frame. I then screwed the surface boards to this.【Get Price】

Types of deck sub-frame for Garden Decking

DECK OVER EXISTING PATIO on existing structurally sound concrete slab ie. 100mm slab on top of 100mm compact hardcore. In this instance 72mm thick beams are supported off the slab using strong angle brackets and durable packing pieces. (45mm thick Use Class 4 joists could also be used for this purpose).【Get Price】

Support For Exterior Deck - Structural Support - Home

For deck joists perpendicular to house wall, a much-preferred alternate method of support is to install a beam (girder) about 2 to 3 feet away from (and parallel to) the house wall. Although this method will cost more than connecting ledger board to house, the support provided is much more secure.【Get Price】

decking on existing patio | Screwfix Community Forum

if the existing slabs are to be used for the base then the clearance is the same, if you remove some or not. what's needed is enough material to screw the decking boards onto. a 3x2 frame with noggins and supports will do the job. i would also put down a black dpm over the slabs. unless you know there is one under the slabs.【Get Price】