Forest Garden Mendip 5m x 4m Log Cabin Garden Office 45mm

The Forest Mendip 5m x 4m Log Cabin (VMEN45D54P2HDBUN) is a large pent-roof garden office measuring 5m x 4m externally (approximately 17ft x 15ft). It delivers 17.5m² (188ft²) of usable internal floor space enough for a proper home office setup with room to spare.

Walls are built from 45mm kiln-dried interlocking logs, which provide solid natural insulation. The 19mm tongue and groove floor sits on pressure treated bearers and handles heavy loads well. The pent roof uses 19mm tongue and groove boarding topped with a 24kg tear-resistant polyester felt carrying a 15-year life expectancy. A 60cm overhang reduces sun glare. All timber is FSC-certified.

Entry is through glazed double doors (1400mm wide x 1730mm tall) with a key-operated lock. Three 3/4-length tilt-and-turn windows are double glazed with 4mm toughened safety glass. Two flank the doors and a third fits left or right of the structure giving excellent natural light throughout. Cable routing for electrics is possible though a qualified electrician must carry out any electrical work.

At 17.5m² this is a serious work-from-home building. Thick log walls keep it comfortable year-round. FSC timber, double glazing and a premium felt roof make it a well-specified garden office.

The Forest Mendip uses 45mm kiln-dried interlocking logs as both structure and wall finish no separate frame is needed. The logs stack and interlock to form solid walls that provide natural thermal mass. The 19mm tongue and groove floor sits on pressure treated bearers to resist ground moisture. The pent roof uses 19mm tongue and groove boards covered with 24kg polyester felt rated to 15 years. A 60cm overhang reduces solar glare. All glazing is 4mm toughened safety glass in double-glazed units used in both the doors and all three tilt-and-turn windows. All timber is FSC-certified.

Structure and walls: 45mm kiln-dried interlocking FSC-certified logs. Floor: 19mm tongue and groove timber on pressure treated bearers. Roof: 19mm tongue and groove boards with 24kg polyester felt. Doors and windows: 4mm toughened safety glass in double-glazed units with UPVC or timber frames. No OSB, SIP panels or MDF used in this log construction.

A solid, level concrete base is required and must be in place before delivery or installation. No base is supplied. The cabin cannot be assembled on grass or uneven ground. The buyer is responsible for all groundwork. A poured concrete slab is the recommended foundation.

The cabin is delivered flat packed and requires self-assembly using the interlocking log construction method. No specific assembly time is stated by the manufacturer. At 3380kg packaged weight, multiple people will be needed. A professional installation service is available as an optional extra and is carried out within 10 working days of delivery.

A professional installation service is available as an optional extra. Installation is carried out within 10 working days of delivery. It does not cover base preparation, electrics or accessories including solar lighting kits. The buyer must have a solid level base ready before the installation date.

No wiring or electrical components are included. Electrics are not part of any installation service. The log construction allows cable routing but all electrical work must be carried out by a qualified electrician arranged separately by the buyer.

Apply a solvent-based preservative immediately on assembly this is a requirement, not a suggestion. Forest recommend Timmersol, applied in three coats, with a top-up coat every five years. Clean glazing regularly. Check the roof felt annually for damage and clear any debris from the overhang. The 1-year guarantee depends on correct treatment being applied.

At 17.5m² (188ft²) internally this is a genuinely large garden building. Two full-size desks fit easily with space left for shelving, a sofa or a meeting area. It works well as a dedicated home office for one or two people. The 19mm tongue and groove floor handles heavier items so it suits a hobby workshop or light gym setup too. Three 3/4-length windows and glazed double doors bring in strong natural light a real advantage for creative studios or photography work.

Most garden buildings fall under permitted development in England and do not need planning permission. This model has a ridge height of 2420mm which sits within typical permitted development limits. Rules differ in Scotland, Wales and Northern Ireland and on designated land. Always check with your local planning authority before you build. This is not legal advice.