Blockboard
Contents |
[edit] Introduction
Blockboard is a timber-based sheet material that comprises a core, faced on both sides. The core is made from parallel, rectangular-section, bonded softwood strips (around 28mm wide); these are sandwiched between a variety of facing materials which can include veneers of softwood, hardwood, thin MDF or particle board. The assembly is glued under high pressure.
The construction can be three-layer – with a single facing on each side of the core, e.g MDF or particleboard, or it can be five-layer for better stability – with two facings on each side. The grain of the facing material is usually arranged so that it is perpendicular to that of the core strips – which for reasons of strength run along the length of the board and are usually made from seasoned, lightweight timbers, such as poplar or spruce. Their moisture content is usually 12% or less.
Blockboard can also be referred to as battenboard, coreboard or lumber core (US). Laminboard is a similar product but generally with thinner strips of core timber.
[edit] Uses
Like chipboard, blockboard is used mainly for interior uses due to the nature of the adhesives used. But in contrast to chipboard, blockboard has great structural stability and strength and is suited to applications such as doors, shelves, tables, panelling, partitions or kitchen worktops which have no intermediate supports.
Blockboard also forms a good base material for veneering, but the edges will have to be lipped with solid wood. It can also be painted after a light sanding but the edges will still require lipping or alternatively filling and sanding.
Blockboard is commonly available in 2,440mm x 1,220mm sheets (based on the imperial 8ft x 4ft dimensions) and in thicknesses of 18mm and 25mm.
[edit] Working
Blockboard can be worked with standard tools: it is easily sawn and has good screw-holding and nail-holding properties. It can be resistant to warping if both sides have similar treatments. It can also be boiling water-proof and 'eco-friendly'.
[edit] Related articles on Designing Buildings
- Adhesives.
- Cedar.
- Chipboard.
- Confederation of Timber Industries.
- Cross-laminated timber.
- Engineered bamboo.
- Engineered wood products EWP.
- Glulam.
- Laminated veneer lumber LVL.
- Lime wood.
- Medium density fibreboard - MDF
- Modified wood.
- Oriented strand board.
- Plywood.
- Softwood.
- Timber.
- Timber construction for London.
- Timber preservation.
- Timber vs wood.
- Types of timber.
Featured articles and news
Cladding remediation programmes, transparency and target date.
National Audit Office issue report on cladding remediation.
HBPT and BEAMS Jubilees. Book review.
Does the first Labour budget deliver for the built environment?
What does the UK Budget mean for electrical contractors?
Mixed response as business pays, are there silver linings?
A brownfield housing boost for Liverpool
A 56 million investment from Homes England now approved.
Fostering a future-ready workforce through collaboration
Collaborative Futures: Competence, Capability and Capacity, published and available for download.
Considerate Constructors Scheme acquires Building A Safer Future
Acquisition defines a new era for safety in construction.
AT Awards evening 2024; the winners and finalists
Recognising professionals with outstanding achievements.
Reactions to the Autumn Budget announcement
And key elements of the quoted budget to rebuild Britain.
Chancellor of the Exchequer delivers Budget
Repairing, fixing, rebuilding, protecting and strengthening.
Expectation management in building design
Interest, management, occupant satisfaction and the performance gap.
Connecting conservation research and practice with IHBC
State of the art heritage research & practice and guidance.
Innovative Silica Safety Toolkit
Receives funding boost in memory of construction visionary.
Gentle density and the current context of planning changes
How should designers deliver it now as it appears in NPPF.
Sustainable Futures. Redefining Retrofit for Net Zero Living
More speakers confirmed for BSRIA Briefing 2024.
Making the most of urban land: Brownfield Passports
Policy paper in brief with industry responses welcomed.
The boundaries and networks of the Magonsæte.