HAMM Principles THE BALANCE OF HEAT, AIR & MOISTURE MOVEMENT IN BUILDINGS A HOLISTIC APPROACH TO A HEALTHY BUILDING ENVELOPE Heat | Air | Moisture Movement

We are a family owned company in its fourth generation, has been providing solutions and products to the construction industry for over 50 years. We have been developing vapour permeable membranes and vapour control layers for over 25 years, and can provide condensation control and air barrier solutions for all areas of the building envelope, across a variety of projects. Understanding the importance of these key elements on the building envelope is crucial to the successful construction and operation of a building. Architects, designers, and building product manufacturers must seek to ensure...

HAMM Principles Introduction Vapour and air movement in a wall structure Heat Air and Moisture Movement – Managing the balance Heat (Thermal insulation and airtightness) Depending on climate and location “heat” is keeping heat in or keeping heat out, therefore when we are considering heat we are mainly concerned with thermal insulation. The effects of heat flow can have a significant impact on the energy efficiency of a building. Managing energy efficiency from design to construction is increasingly important. The Impact of Heat Flow To maximise the design of a building’s energy efficiency a...

HAMM Principles Unmanaged or uncontrolled air flow can act as a carrier for moist air, drawing it in from outside, or pulling it from inside, into walls, ceilings and roofs. The impact of this uncontrolled moist air movement can have a long term detrimental effect on the durability and life of the building. Impact on energy efficiency Uncontrolled air flow will influence the energy efficiency of the building. Initial heat load calculations for heating and cooling equipment will usually make an allowance for a level of natural infiltration or uncontrolled air flow. The higher the infiltration...

HAMM Principles Spacetherm A2 Cold Bridge Strip SPACETHERM® SLENTEX® A2 Spacetherm SLENTEX® A2 is a flexible, high-performance, silica aerogel-based insulation material of limited combustibility used for exterior and interior applications. Supplied in a variety of finishes**, the substantial layers of Spacetherm SLENTEX® A2 meet the requirements for A2 classification. The product is used to optimise the thermal performance and fire properties of façade systems in a number of ways. These include enhancing the thermal performance of the ventilated façade, and addressing thermal bridging in the...

HAMM Principles 3mm Magnesium Oxide Board (MgO) Spacetherm WL (Wall Liner) is an internal thin insulation system for hard to treat walls and is specifically designed to be installed to internal surfaces of existing solid walls without the need for mechanical fixings. Spacetherm WL, which overall thickness is 13mm, consists of 10mm Spacetherm Aerogel insulation blanket bonded to 3mm Magnesium Oxide Board (MgO). Spacetherm WL is a nonhazardous material for use in applications where improved thermal performance is required with limited space. Spacetherm WL can achieve similar performance to traditional...

HAMM Principles Reflectashield TF 0.81 is a water resistant, non-woven polypropylene foil faced laminate with a unique patented three layer composition, providing excellent breathability, as well as secondary protection to the building during construction. Reflectashield TF 0.81 is vapour permeable, has low emissivity and an enhanced foil surface designed to improve the thermal resistance of timber and steel frame structures. It has a high strength to weight ratio. The product is installed on the external face of the timber frame, foil side face out, similar to that of a traditional breather...

REFLECTATHERM PLUS HAMM Principles Reflectatherm Plus The membrane should be installed with the foil side facing the cavity. In ceilings the product is placed between the underside of the rafters and the ceiling lining. Adjacent sheets should be lapped by 150mm and sealed with Reflectafoil Tape. Penetrations caused by services must be minimised to ensure effectiveness, and all joints need to be sealed. Reflectatherm Plus is a reflective, high resistance vapour barrier for internal walls, ceilings and floors, specifically designed to improve the thermal performance and airtightness when placed...

HAMM Principles Reflectatherm Premier REFLECTATHERM PREMIER Reflectatherm Premier is a reflective vapour control layer with integrated tape for ease of installation. Reflectatherm Premier is for internal walls, ceilings and floors, specifically designed to enhance the thermal performance when placed on the warm side of the insulation. The integrated tape, which is a key feature of Reflectatherm Premier, ensures an efficient, consistent, continuous and well sealed membrane to protect the structure from vapour and air movement. The quick and efficient installation, utilising the integrated tape,...

HAMM Principles Wraptite Wraptite is a unique patented external airtight and vapour permeable, self-adhered membrane which solves the problem of reliably achieving airtightness in buildings. Applying Wraptite to the outside of the building will mean there are fewer penetrations for services therefore the likelihood of expensive remedial work is greatly reduced. Wraptite is easy to install and fully bonds to virtually any substrate, with a key benefit being its speed and ease of installation, negating any requirement for sealants or tapes. This new approach saves on both the labour and material...

HAMM Principles FRAMETITE® Frametite is a vapour permeable, airtight wall underlay, which is durable, flexibile and lightweight allowing for easy installation. Frametite is water resistant and has a resilient composition, which resists punctures and tears during installation. Frametite can be utilised with Wraptite Tape to provide a simplified and robust method of achieving low air leakage rates, particularly when installed on site, as is typical with large scale rain screen construction, or when sealing junctions between prefabricated building components. By reducing the likelihood of failures...