How thick should loft boards be?

Standard loft boards come in two different sizes; 2,400mm x 600mm and 1,220mm x 320mm; both of which are 18mm thick. Remember to make sure that the boards you decide on will actually fit through your loft hatch!
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Is 18mm chipboard OK for loft?

18mm is fine for storage,you could try 22mm but consider the extra weight.
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What size loft boards do I need?

Simple enough in theory - you just need to multiply the width of your loft by its length. You will also need to measure the distance between your joists or trusses. With your measurements to hand, you can now work out how many loft boards you'll need.
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Can you lay loft boards directly onto joists?

You can still board directly on to the joists if you want, but it is worth noting that this would not pass a building control inspection, because you wouldn't have the full 270mm depth of insulation required by regulations. Whatever you do, make sure you put as much insulation beneath the boards as possible.
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What boards do you use for loft?

We'd recommend using purpose-built loft boards as they tend to have tongue and groove fittings for easy installation, and they are also often shorter, so easier to get through your loft hatch.
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How to Board a Loft | ADVICE | Homebuilding



How do you board a loft cheaply?

For a cheaper way to board than Diy store boards, buy larger flooring boards and cut them down yourself, better value for money especially if you can pick them up from a merchant. You can then measure loft hatch opening and lay in longer lengths, depending on height to pull boards up.
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Is it OK to board over loft insulation?

By boarding over your loft insulation, you can create a lot more storage space whilst creating a safe and stable environment. Despite this being an extremely effective solution, it is important to complete the process to the best standard to ensure that your loft insulation isn't compromised.
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Can I walk on loft boards?

If your loft floor isn't sufficiently boarded, movement can be tricky. Never stand on the plasterboard as this won't bear your weight and only stand on the ceiling joists if you have to. For easier movement in the loft, we recommend using walk boards (also known as crawl boards) laid across the joists.
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Do loft boards have to be staggered?

Lay Out Your Loft Boards

Try to lay out your loft boards in a staggered pattern. This is important because you don't want the joints in all your loft boards to meet up as this could compromise its structure. The best screws for the job include 4mm x 30mm countersunk multi-purpose screws.
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How thick is a loft floor?

How thick is the loft floor in a tiny house? The most common beams used in tiny house lofts are 2×4 or 2×6. Once the frame is laid, the flooring is placed on top. These floorboards add around half an inch of tiny house loft floor thickness, with the flooring material topping it up by another 1/4 to 1/2 inch.
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How do I strengthen my joists in my loft?

How to Reinforce an Attic Floor with Sister Joists
  1. Clear the Joist Spaces. Pull out all insulation and any debris from all of the joist spaces so you can see the full length of each joist, including where it meets the exterior walls. ...
  2. Measure the Old Joists. ...
  3. Cut the Sister Joists. ...
  4. Install the Sister Joists. ...
  5. Install Blocking.
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Does boarding a loft add value?

The biggest loss of heat in a building is through the roof, and boarding your loft strengthens the insulation. A boarded loft is also likely to add value to your home — a mixture of energy efficiency, convenience and the simple fact that it looks a lot nicer than a loft with bare joists.
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What is the difference between P4 and P5 chipboard?

P4 – It is load-bearing only for dry conditions. P5 – It is moisture resistant and load-bearing. It is preferred for chipboard floorboards.
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Is chipboard OK for loft flooring?

Excellent Size for Loft Flooring

These chipboard loft panels are excellent and easy to handle in confined spaces.
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How much weight can loft boards take?

Trusses in new build homes are designed and built to allow for 25Kg/m2 of storage plus the weight of a person walking in the loft. For older homes a professional survey may be required. The safe load will depend on the size of the joist and the length of its span.
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How much weight can loft legs take?

Though loft legs can support high weights up to 500kg we would recommend no more than 50kg per m² due to load bearing characteristics of a loft.
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How do you attach a loft Board?

How to board a loft
  1. Step 1: Measure Up. Work out the area that you need the boards to cover. ...
  2. Step 2: Get to Work. Put on your protective clothing and place a board between the ceiling joists to act as a temporary work platform. ...
  3. Step 3: Making it Permanent.
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Can I board my loft and use it as a bedroom?

Can I board my loft and use it as a bedroom? If you're converting your loft into an extra bedroom, or a room that is considered a living space, the work will have to meet the government's Building Regulations. The room must be accessible via a permanent staircase and must have the correct fire regulations.
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How do you insulate a loft board?

Use a downlight cover such as a Loft Lid before rolling insulation over the fittings. Don't block any vents such as soffit vents with insulation. Don't squash the insulation as this can reduce its thermal performance by over 50%. Don't install loft boards directly to joists or trusses.
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Can loft boarding cause damp?

How Standard Loft Boarding Can Damage Your Property. Can cause damp – as standard boarding is placed onto the joists of your roof, this will inevitably squash your insulation, which stops it from working and will cause condensation to build up as it doesn't have room to breathe.
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Does boarding your loft cause condensation?

Does Loft Boarding Cause Condensation? Yes, it can. Before the amount of insulation changed it wasn't so much of a problem. However, now, if standard boarding is placed on top of your deep insulation, the material below won't be able to breathe or take in the moisture.
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Can I cover my attic insulation with plywood?

Once the insulation is down, you can turn your attic into valuable storage space by covering the floor with plywood. It will also make the attic a safer place in which to walk.
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What kind of wood should I use for an attic floor?

You need 3/4-inch plywood. The thinner plywood is acceptable when the joist spacing is 16 inches. If you plan to finish the floor in the attic and turn the room into a living space, however, you should always use 3/4-inch plywood.
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